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THE UNIVERSITY OF HONG KONGLIBRARIES

This book was receivedin accordance with the Books

Registration OrdinanceSection 4

DRAFT CODE OF PRACTICE

FOR

SITE SAFETY SUPERVISION

December 1997

BOOKS REGISTRATION ORDINANCEChapter 142

No.: HK 98393S FT

FOREWORD

In order to improve safety on or adjacent to private construction anddemolition sites in Hong Kong, a new site safety supervision plan system is introduced.This calls for the submission of a supervision plan prior to or at the time of application forconsent to commence works.

The Technical Memorandum for Supervision Plans (the TechnicalMemorandum) issued under section 39A of the Buildings Ordinance sets out the principles,requirements and operation of supervision plans, whereas detailed guidance on theapplication of the Technical Memorandum and the preparation of supervision plans are tobe provided in the Code of Practice for Site Safety Supervision (the Code).

The Code is now issued as a draft document. It will be replaced by afinalized edition when it has been reviewed through experience gained in its application.

Any enquiries or comments on the Code may be directed to the ChiefOfficer/Site Monitoring of the Buildings Department at 12/F - 18/F, Pioneer Centre, 750Nathan Road, Kowloon, Hong Kong.

December 1997Buildings Department

Contents

1 Background 1-2

2 Application and Scope 2

3 Interpretation 3

4 General Principles 3 -5

5 Management and Responsibilities 5-53

6 Assessment of Degree of Complexity 54 - 82

7 Supervision Requirements 83-100

8 Additional Safety Supervision Requirements 101 -107

9 Communication and Reports 108-110

10 Minor Deviations from a Supervision Plan 111-112

1 Background

1.1 In order to improve safety on or adjacent to private building construction

sites in Hong Kong, the Buildings (Amendment) Ordinance 1996 was

enacted. This Ordinance requires, inter alia, the preparation and adherence

to a new form of document called a supervision plan.

1.2 The supervision plan as defined in Section 2 (1) of the Buildings Ordinance

sets out a system for safety management of building works or street works.

It is to be lodged by an authorized person with the Building Authority:-

(a) prior to or at the time of application for consent to the

commencement of building works or street works; or

(b) as a result of carrying out urgent works.

1.3 The supervision plan, is to be put into operation by qualified and

experienced professional and technical personnel i.e. Technically

Competent Persons.

1.4 Safety management of building works and street works addresses two types

of supervision:

(a) Quality Supervision

This means ensuring that the building works or street works are

carried out in general accordance with the provisions of the Buildings

Ordinance and Regulations and with the plans approved in respect of

them by the Building Authority and with any order made or condition

imposed, pursuant to any provision of the Ordinance or regulations in

that behalf, by the Building Authority; and

(b) Site Safety Supervision

This means controlling hazards from building works and street works

so as to minimise the risk to :

(i) the workers on site;

(ii) all persons around the sites; and

(iii) adjoining buildings, structures and land.

1.5 The Technical Memorandum for Supervision Plan (Technical

Memorandum) sets out the principles of management for supervision, the

framework for managing site safety supervision and for the format of

supervision plans.

2 Application and Scope

2.1 This Code of Practice provides detailed guidance to the practitioners on the

application of the Technical Memorandum, addressing specifically the

following so as to assist the practitioners in the preparation of the

supervision plan:

(a) safety management structure;

(b) assessment of complexity of types of building works and street

works;

(c) safety supervision requirements; and

(d) communication and reporting requirements.

2.2 This Code of Practice is to be read in conjunction with the Technical

Memorandum. In implementing the requirements of the supervision plan,

reference should also be made to the Buildings Ordinance, the Building

Regulations, Practice Notes for Authorized Persons and Registered

Structural Engineers (PNAPs), Practice Notes for Registered Contractors

(PNRCs) and any other relevant documents issued by the Building

Authority.

2.3 In considering method statements, precautionary and protective measures,

practitioners are encouraged to consider not only the minimum standards

referred to in this Code of Practice but to consider prevalent standards and

improved measures, if relevant and practicable.

3

Unless specified otherwise, the terms and expressions used in this Code of

Practice have the same meaning as has been assigned under the Buildings

Ordinance and the Building Regulations. Any additional terms and

expressions used in this Code of Practice are explained in the text of this

Code or defined in the Technical Memorandum.

4 General Principles

Underlying Principles

4.1 The Technical Memorandum sets out the underlying principles of safety

management and the following major aspects of the supervision system:

(a) the framework and purpose of the site safety management system;

(b) the roles and responsibilities of the parties concerned;

(c) the two types of site safety supervision - routine safety supervision

and engineering safety supervision;

(d) the employment of Technically Competent Persons; and

(e) the preparation of supervision plans.

4.2 This Code of Practice explains:

(a) how to establish the degree of complexity of various types of works;

(b) how to approach method statements, precautionary and protective

measures;

(c) how to establish the class of supervision;

(d) how TCPs may best be deployed and how their duties may be

combined;

(e) the management structure within each functional stream and the

responsibilities for communication; and

(f) the specific tasks of TCPs in carrying out safety supervision.

Basic Principles for Assessing Safety Supervision Requirements

4.3 In principle, the total supervision requirements (SRT) for a particular type of

building works or street works is a function of scale (S), difficulty (D) and

risk (R), such that:

SRT = f,(S) x f2(D,R)

where:

• fj is a modifier which makes allowance for the scale of the building

works or street works;

• f2 measures the complexity of the building works or street works;

• complexity is a combination of difficulty (D) and risk (R);

4.4 The information used to assess scale, difficulty and risk (in the form of

input parameters) is measured independently for each parameter.

4.5 Both the complexity f2(D, R) and the supervision requirements SRT will be

assessed in discrete steps.

Phased Implementation

4.6 The Technical Memorandum and Code of Practice set out the qualifications

and experience of TCPs and the frequency of their site inspections. These

overall requirements will be introduced progressively on an incremental

basis over a transition period.

4.7 The length of the transition period, and the incremental arrangements will

be determined by the Building Authority and published from time to time in

the Practice Notes for Authorized Persons and Registered Structural

Engineers (PNAPs) and the Practice Notes for Registered Contractors

(PNRCs).

4.8 After the standards .set out in the Technical Memorandum and Code of

Practice have been fully attained, the Building Authority will review and

may upgrade the'required qualifications and experience of the TCPs and the

frequency of their site inspections in order to further improve the standard

of supervision, after taking into consideration the supply of TCPs, the

prevailing state of construction technology and method.

5 Management and Responsibilities

5.1 This section sets out the responsibilities of each TCP and other personnel in

the site safety management structure. This includes listing of individual

responsibilities and references to tables of specific tasks. Guidance is given

on the division of responsibility for temporary works between the

Contractor and RSE.

Chain of Responsibility

5.2 The AP, RSE and RGBC/RSC are at the head of the organizational

structure and have overall responsibility and accountability for their

respective functional streams. They will each appoint a Representative who

is the highest grade TCP within their respective supervision streams and

who is required to take the senior role in the site safety management

structure. In the chain of responsibility, therefore, the appointed

Representatives are accountable to the AP, RSE or RGBC/RSC (in the last

case through the Authorized Signatory [AS]). All other site safety

management personnel are accountable to the appointed Representative of

their respective streams.

5.3 Under normal circumstances with a full site staff complement the general

responsibilities of TCPs are as follows.

TCP Grade General Responsibilities

Tl Check on a routine basis that the work on site complies with

general site safety requirements and that the general site

safety aspects of building works or street works are properly

carried out.

T2 Check that identified specialist aspects of site work comply

with safety requirements.

T3 Monitor the activities of subordinate TCPs to ensure that

routine checks are being carried out at the frequency set out

in this Code of Practice and that reports and records are

properly prepared and filed.

T4 Check that specified aspects of site work comply with the

design requirements where these are related to site safety

and with the supervision plan including method statements,

precautionary and protective measures. Check that systems

are in place and followed, to record that site safety

supervision has been properly executed.

T5 Check that site operations and installations meet safety

requirements. For the design of temporary and/or permanent

works where safety relies on assumed conditions being

present on site, validate those assumptions by checking the

actual site conditions and taking necessary follow up action.

Direct subordinate TCPs in priorities and identify aspects of

work which require special care and supervision.

5.4 TCPs may be called on to carry out the general responsibilities of junior

positions and the duties of TCPs may be combined.

5.5 Within the safety management structure two types of site safety supervision

are identified. As defined in the Technical Memorandum these are:

a) Engineering Safety Supervision; and

b) Routine Safety Supervision.

5.6 In the check lists of specific tasks set out in Tables of 5 series, the tasks and

responsibilities of TCPs are assigned with reference to the above broad

headings but referred back also to the levels of supervision established in

the Technical Memorandum.

5.7 The responsibilities arising out of engineering safety supervision should be

discharged by TCPs of grade T4 or T5. TCPs of lower grades should not be

called on to carry out engineering safety supervision responsibilities as

these are commensurate with the qualifications and experience associated

with professionally qualified persons or the qualifications of degree holders.

5.8 Further details of the responsibilities of each stream are set out below.

AP 9s Safety Management Structure

5.9 The AP's Representative will have the duties and responsibilities listed

below.

Responsibilities

(a) The AP's Representative is accountable to the AP for the

implementation of the AP' s supervision plan.

(b) He is the formal point of contact, representing the AP in

communication with other functional streams.

(c) He is accountable to the AP with a responsibility for coordinating

and compiling reports on supervision activities including reports on

non-conformity, incorporating those reports on supervision activities

prepared by other disciplines and for forwarding them to the AP as

appropriate; (the activities include but are not confined to those in

the check list of specific tasks which is provided in this Code of

Practice).

Duties

(d) He will coordinate the submission of supervision plans for all

streams;

(e) In respect of non-conformity he will follow the procedures set out in

Section 9 of this Code of Practice.

5.10 An AP's TCP who is responsible for undertaking engineering safety

supervision will have the duties and responsibilities listed below.

Responsibilities

(a) He is accountable to the AP, through the AP's Representative, for

the implementation of the AP's supervision plan.

(b) He has the relevant responsibilities set down in the Technical

Memorandum and this Code of Practice.

Duties

(c) He is responsible for the safety supervision of the works including,

but not confined to, those specific tasks set out in the check list

provided in this Code of Practice.

(d) When necessary, he will validate conditions on site which relate to

design assumptions.

(e) He will take action in respect of non-conformity by referral to the

AP's Representative and by notifying TCPs in other streams.

5.11 An AP's TCP who is responsible for undertaking routine safety supervision

will have the duties and responsibilities listed below.

Responsibilities

(a) He is accountable to the AP through the AP's Representative.



Duties

(c) He is responsible for site safety supervision including but not

confined to those specific tasks set out in the check list provided in

this Code of Practice.

(d) He will monitor closely the work of the Contractor's TCPs in

respect of supervision of general and minor site safety aspects of

building works or street works as identified in this Code of Practice.

(e) He will maintain on site, registers of all relevant safety supervision

plans together with all reports, documents and correspondence

relating to the particular site safety supervision plan.

(f) He will take action in respect of non-conformity by referral to the

AP's Representative and by informing TCPs in other streams.

RSE 's Safety Management Structure

5.12 The RSE's Representative will have the duties and responsibilities listed

below.

Responsibilities

(a) He is accountable to the RSE for implementing the RSE's

supervision plan, in respect of site safety aspects.

(b) He is the formal point of contact, representing the RSE in


(c) He has overall responsibility to check if the safety measures on

site meet with the requirements of safety supervision plans.

(d) He is accountable to the RSE for the satisfactory execution of

the specific tasks and responsibilities of junior TCPs, including

but not confined to those set out in the check list provided in


Duties

(e) He will assist the RSE in carrying out site safety management

functions.

(f) In respect of non-conformity of structural nature, he will follow

the procedures set out in Section 9 of this Code of Practice.

5.13 An RSE's TCP who is responsible for undertaking engineering safety


Responsibilities

(a) He is accountable to the RSE through the RSE's Representative,

for the implementation of the RSE's supervision plan.



Duties

(c) He Is responsible for the engineering safety supervision of the

works including, but not confined to, those tasks set out in check

list provided in this Code of Practice.

(d) When necessary, he will validate conditions on .site which relate to

design assumptions.


RSE's Representative and by notifying TCPs in other streams.

5.14 An RSE's TCP who is responsible for undertaking routine safety


Responsibilities

(a) He is accountable to the RSE through the RSE's Representative.



Duties

(c) He is responsible for site safety supervision including but not

confined to the specific tasks set out in the check list provided in


(d) He is responsible for checking that the Contractor's TCPs have

carried out their supervision tasks in areas of work including but not

confined to the specific tasks set out in check list provided in this

Code of Practice.


RSE's Representative and by notifying TCPs in other streams.

Contractor's Safety Management Structure

5.15 The Authorized Signatory of the Contractor (AS) will have the duties and

responsibilities listed below.

Responsibilities

(a) He has overall responsibility for safety matters regarding the project.

(b) He is responsible for ensuring that his Detailed Safety Supervision

Plans are regularly reviewed and implemented.

10

(c) He will ensure that reports of non-conformity, are immediately acted

on and that rectification is carried out forthwith.

(d) He will have delegated authority to accept instructions and advice

on behalf of the Contractor and will be given authority by the

Contractor to take necessary action.

Duties

(e) He will ensure good communication exists between his

Representative and other TCPs including the AFs and RSE's

Representatives.

(f) He will establish and maintain communication between himself and

his Representative.

5.16 The Contractor's Representative will have the duties and responsibilities

listed below.

Responsibilities

(a) He is accountable to the AS for implementing the safety supervision

plan.

(b) He is accountable to the AS for the implementation of the

contractor's supervision plan.

(c) He is the formal point of contact, representing the Contractor in


(d) He has sufficient delegated authority to instruct subordinates and

sub-contractors on safety related matters.

Duties

(e) He will assist the AS in carrying out his site safety management

functions

(f) He will ensure that all members of line management, including sub-

contractors and TCPs, are conversant with the Detailed Safety

Supervision Plan and the supporting documentation and have

sufficient resources to implement safety measures.

(g) He will ensure good coordination and communication exists

between his site safety management TCPs and safety officers and

safety supervisors provided under other legislation.

11

(h) In respect of non-conformity, he will report follow the procedures

set out in Section 9 of this Code of Practice.

(i) He will investigate the causes of each non-conformity and will

institute measures which will prevent further occurrence.

5.17 A Contractor's TCP who is responsible for undertaking engineering safety


Responsibilities

(a) He is accountable to the AS through the Contractor's

Representative.

(b) He has the overall responsibilities detailed in the Technical

Memorandum and this Code of Practice and is also responsible for

checking that conditions and circumstances shown on the drawings

are present on site but excluding checking of the AP's and RSE's

design.

Duties

(c) He will check that where required in the Detailed Safety Supervision

Plan, design assumptions made in the design of temporary works

and method statements are validated on site.

(d) He will take action in respect of non-conformity by referral to the

Contractor's Representative, by instructing rectification and by

notifying TCPs in other streams.

5.18 A Contractor's TCP who is responsible for undertaking routine safety


Responsibilities

(a) He is accountable to the Contractor's Representative.

(b) He has the overall responsibilities set down in the Technical

Memorandum and this Code of Practice, including those which are

detailed in this paragraph.

12

Duties

(c) He will also check specialist aspects of work to see that it is

carried out in accordance with the method statements,

precautionary and protective measures in order to ensure that it

complies with the submitted safety supervision plans.

(d) He will take action in respect of non-conformity by referral to the

Contractor's Representative and by informing TCPs in other

streams.

(e) Where more than one TCP is appointed to carry out routine safety

supervision their responsibilities should be established in the

contractor's DSSP.

Division of responsibility between RSE and Contractor for Temporary

Works and Working Procedures

5.19 The Contractor has the sole responsibility to ensure the integrity of the

temporary structure itself and the associated fixing methods.

5.20 The division of responsibility between RSE and Contractor for temporary

works is detailed below:

Case 1 When the prescribed plans stipulate temporary works and the

sequence of construction or method statements are also shown

on prescribed plans, both the RSE and the Contractor have the

responsibility of supervising the carrying out of the works in

accordance with the approved plans.

Case 2 When the temporary works, the sequence of construction or

method statements are not required to be shown on prescribed

plans and in cases when these have no effect on the permanent

structure, the Contractor has the sole responsibility of ensuring

the integrity of temporary works and that the carrying out of

temporary works should be safe and should not endanger the

workers on site, the public and adjoining buildings.

13

Case 3 In cases when the temporary works or the sequence of

construction or method statements are not required to be shown

on the prescribed plans but have a potential effect on the

integrity or serviceability of the permanent structure whether

during construction or after completion, two different cases will

be considered:-

Case 3A Part of the permanent structure will be temporarily

overstressed due to stress redistribution in the

partially constructed structure.

CaseSB The permanent structure is affected by way of

additional imposed loading over the designed

loading.

The demarcation of responsibilities between the RSE and the

Contractor on supervision of carrying out of the temporary

works and the sequence of construction are shown in the

flowchart at Chart 5.1.

5.21 For case 3A, the plans, design information and/or method statement that is

to be lodged with the project RSE by the Contractor will be certified and

signed by a person whose name is included in the list of Registered

Structural Engineers kept by the Building Authority. The certificate for

completion of temporary works will also be signed by the same person to

certify that the temporary works have been carried out in accordance with

the plans.

5.22 For case 3B, the certificate that the permanent structure will not be

overloaded, which is to be lodged with the project RSE by the Contractor

will be signed by a person whose qualifications and experience are not

inferior to that required for a T5. The certificate for completion of

temporary works will also be signed by the same person to certify that the

works have been carried out to his satisfaction.

14

5.23 The RSE may require the Contractor to submit further calculations to

substantiate his design check.

Communication Procedures

5.24 Successful implementation of the Supervision Plan requires effective and

efficient communication within and between each stream. Within streams,

lines of communication should be established between the engineering

safety supervision level and the routine safety supervision level whereas

interstream communications should usually take place between stream

counterparts.

5.25 Lines of communication between the site safety management structure

levels are needed for reporting, instructing and information purposes.

Safety Management Statement in DSSP

5.26 In completing the DSSP, a statement is required to the effect that safety

management of the works will be carried out in the manner prescribed by

the Ordinance and Regulations. Each author in turn is required to

consider this topic under the following items of the DSSP:

Item 8 to be considered by APs; item 12 by RSEs; item 18 by RGBCs and

item 24 by RSCs.

Author's Signature

5.27 The DSSP authors are required to state and sign to the effect that the

relevant part of the DSSP has been prepared by the AP (item .9), the RSE

(item 13), the RGBC (item 19) and the RSC (item 25), and also that the

part of the DSSP which they have prepared complies with the Technical

Memorandum, Code of Practice, the Buildings Ordinance and

Regulations.

15

Chart 5.1 - Division of Responsibility Between RSE and Contractor for Temporary Works andWorking Procedures That Are Not Required To Be Shown OnPrescribed Plans But That May Affect Permanent Structure(Section 5.20 refers)

Temporary works / workingprocedures that may affectpermanent works temporarily

Case 3A

Temporary overstressing ofthe permanent structure dueto stress redistribution,e.g. Refuse chute opening

21 days before thecommencement of theTemporary Works theContractor will lodge withthe Project RSE the plansand design information forthe Temporary Works,and/or a method statement

If the Project RSE is satisfiedthat the integrity of thePermanent Works remainsunaffected he will issue a reply(copied to AP) to allow theContractor to proceed

Within 14 days after thecompletion of the TemporaryWorks; the Contractor willsubmit a certificate to theProject RSE to certify that theTemporary Works have beencarried out in accordancewith the plans

Case 3BImposing loading on thepermanent structure,e.g. temporary workingplatform, bending yardor storage

RSE to release relevantdesign information tothe Contractor on request.

21 days before thecommencement of theTemporary Works theContractor will submita certificate to the ProjectRSE to certify that thepermanent structure willnot be overloaded

Within 14 days after thecompletion of the TemporaryWorks, the person appointedby the Contractor will submita certificate to the Project RSEto-certify'that the works havebeen carried out to hissatisfaction

16

Check Lists For Specific Tasks by TCPs

Table No. Specific Tasks by

5.1.1 AP's Representative

5.1.2 AP's T4

5.1.3 AP's T3

5.2.1 RSE's Representative

5.2.2 RSE's T5

5.2.3 RSE's T4

5.2.4 RSE's T3

5.2.5 RSE's T2

5.3.1 Contractor's Representative

5.3.2 Contractor's T5




5.3.6 Contractor's Tl

17

Table 5.1.1 Check List of Specific Tasks For AP's Representative Sheet 1 of 2Type of Tasks : Systems and Reports

Project: Type(s) of Works :

TCP filling in this check list

Name : . Signature: Date :

Sharing duties of other TCPs : AP 's stream RSE's stream

ItemNo. Description

Satisfactory

Yes NoNot

Applicable

1 .1 .1

General

Check that an office has been established for a central registry

1.1.2

Systems

Establish systems for:- co-ordinating and compiling reports- filing of reports in central site registry- maintenance of filing systems- forwarding reports to AP in case of:

i. non-conformity and failure to take remedial measuresii. non-conformity posing immediately danger

1.1.3

1.1.4

1.1.5

1.1.6

1.1.7

1.1.8

1.1.9

Action and Reporting

Register reports of non-conformity and inform other representativesof non-conformity.

In the case of report of non-structural non-conformity, verify thatnon-conformity has occurred and instruct rectification works

If the non-conformity is considered to pose an imminent danger,report to the AP immediately

If the non-conformity is considered to be a significant risk or asource of danger and if the Contractor does not comply withinstructions, report to the AP

Inform RSE of actions taken

Notify Contractor's Representative if rectification measures areinadequate

Report to AP copied to Contractor's and RSE's Representatives whennon-conformity has been rectified

18

Table 5.1.1 Check List of Specific Tasks For AP's Representative (Cont'd) Sheet 2 of 2Type of Tasks : Systems and Reports



Name : Signature : Date :

Record of Instruction of Rectification Works

Instruction given to : (Functional Stream : , Grade of TCP :.

Item No. Instruction of Rectification

Record of Referral

Item No Person Referred to Functional Stream Grade of TCP

19

Table 5.1.2 Check List of Specific Tasks For AP5s T4 Sheet I of IType of Tasks : Engineering Safety Supervision


TCP fil

Name :

Sharing

ItemNo.

1.2.1

1.2.2

1.2.3

1.2.4

1.2.5

1.2.6

Record

Instruct

Item Nc

ling in this check list

Signature : Date :

•r dnties of other T^Ps • AP's stream RSE 's stream

DescriptionGeneral

Check that works on site comply with method statements

Check and satisfy that precautionary and protective measures are inplace to meet site conditions

Site Formation

Check that revealed conditions are compatible withpredicted/assumed conditions

Check and monitor sequence of excavation to ensure lateral supportis not removed in advance of adequate propping or restraint

Check access benches and edges for any evidence of unstable planesor wedges

Check that temporary cuttings will not cause any instability toadjoining ground and final formation

Satisfactory

Yes NoNot

Applicable

of Instruction of Rectification Works

ion given to: (Functional Stream : .Grade of TCP: ^

>. Instruction of Rectification

Record of Referral


20

Table 5.1.3 Check List of Specific Tasks For AP's.TS Sheet 1 of 2Type of Tasks : Management and Co-ordination;

Routine Safety SupervisionProject: Type(s) of Works :

TCP filling in this check list ~~~~

Name : Signature: Date :

Sharing duties of other TCPs : AP 's stream RSE *s stream

ItemNo.

1.3.1

1.3.2

1.3.3

1.3.4

1.3.5

1.3.6

1.3.7

1,3.8

1.3.9

1.3.10

Description .General

Check that central record system and registry have been physicallyestablished for all streams (Contractor, AP and RSE)

Maintain registry and all relevant safety supervision plans togetherwith all relevant reports, documents and correspondence

Check and satisfy that copies of approved plans are kept on site

Check that the hoarding and/or covered walkways are erected tosecure safety of the public in accordance with the hoarding planagreed by the Building Authority

Management

Check that Contractor's T1/T2/T3 are making inspections no lessthan the required frequency and carrying out duties in accordancewith the Technical Memorandum and the Code of Practice for SiteSafety Supervision

Demolition

Check that the provision and condition of scaffolding, catch fans,matscreens and heavy duty nylon mats, as appropriate, aresatisfactory

Site Formation

Check that monitoring stations are installed when necessary and thatreadings are being taken

Check that piezometers, where required, are properly covered andmaintained and readings taken at the frequency required

Check that method statements have been prepared and are beingfollowed for installing rock anchors or soil nails

Action and Reporting on Non-Conformity

Report non-conformity to AP's Representative and to counterpartTCPs

Satisfactory

Yes NoNot

Applicable

21

Table 5.13 Check List of Specific Tasks For AP's T3. (Cont'd) Sheet 2 of 2Type of Tasks : Management and Co-ordination;

Routine Safety Supervision .•


TCP filling in this check list ————- -

Name : '. Signature : __ Date :




Record of Referral


22

Table 5.2.1

Project :

Check List of Specific Tasks For RSE's RepresentativeType of Tasks : Systems and Reports

Sheet 1 of !

Type(s) of Works :



Sharing

ItemNo.

2.1.1

2.1.2

2.1.3

2.1.4

2.1.5

2.1.6

2.1.7

2.1.8

f duties of other TCPs : AP 's stream RSE 's stream

DescriptionSystems

Set up communication systems with RSE's TCPs

Action and Reports

In the case of report of structural non-conformity, verify that non-conformity has occurred and instruct rectification works

If the non-conformity is considered to pose an imminent danger,report to the RSE

If the non-conformity is considered to cause a material concern forsafety and if the Contractor does not comply with instructions, reportto the RSE

Inform AP's Representative of actions taken

Monitor that rectification measures are properly carried out

Notify Contractor's Representative if rectification measures areinadequate

Report to the RSE, copied to the Contractor's and AP'sRepresentatives, when non-conformity has been rectified

Satisfactory

Yes NoNot

Applicable


Instruction given to : (Functional Stream : . Grade of TCP : )


Record of Referral


23

Table 5.2.2

Project:

Check List of Specific Tasks For RSE's T5Type of Tasks : Engineering Safety Supervision

Type(s) of Works :

Sheet 1 of 3


Name : „ __ Signature : Date :

Sharing duties of other TCPs : AP 's stream RSE 's stream

ItemNo.

2.2.1

2.2.2

2,2.3

2.2.4

2.2.5

2.2.6

2.2.7

2.2.8

2.2.9

2.2.10

2.2.11

2.2.12

DescriptionGeneral

Check that structural works on site comply with method statements

Instruct RSE's TCPs Grade T2/T3 on aspects of work which requirespecial care and consideration

For cases where plant and machinery are supported or anchoredagainst the permanent structure or supported on a temporary structurethat affects the permanent structure and in such case, the integrity ofthe permanent structure is not maintained, check that the permanentstructure is adequate for the imposed load

Demolition of Superstructure

Check that cantilever structures are removed before generaldemolition of each floor

Excavation and Lateral Support

Check that approved/agreed method statement is followed

Check that there is no risk of artesian conditions

Check that nearby buildings and ground are not adversely affected

Check that depths of sheet pile or other vertical supporting membersare consistent with those estimated at design stage

Check that sufficient layers of horizontal support are provided

Check that design of walings including packing and web stiffening isadequate

Check that design of props for deflection and acceptance of proploads is adequate

Check that raking props are adequately supported and have sufficientand reliable reaction

Satisfactory

Yes NoNot

Applicable

24

Table 5.2.2 Check List of Specific Tasks For RSE'3 T5 (Cont'd)Type of Tasks : Engineering Safety Supervision

Sheet 2 of 3



Name: Signature : Date :

ItemNo. Description

Satisfactory

Yes NoNot

Applicable

2.2.13

2.2.14

Excavation and Lateral Support (Cont'd)

Check that as excavation proceeds, depth of sheet piles or similarvertical members are in place to sufficient depth to provide adequatecut off and lateral support below current depth of excavation byreference to original design, installation records and characteristicsof subsoil being excavated

Check that effect of groundwater table is consistent with design oftemporary works

2.2.15

2.2.16

2.2.17

2.2.18

2.2.19

Top Down Construction

Check that enclosing walls show no signs of defect or lack ofsoundness

Check that before excavation takes place the highest new deck levelis in place and has achieved sufficient strength to provide lateralprop forces

Check that records are in place to show that during excavation thereis no unexpected deflection on the highest deck level and subsequentnew floor levels

Check that at new deck levels adequate reinforcement or fixings arein place to locate, support and restrain floors at joints with walls andcolumns

Check that columns are adequate to accept substructure loads and areadequately braced or restrained at all times

25

Table 5.2.2 Check List of Specific Tasks For T5 (Cont'd) Sheet 3 of 3Type of Tasks : Engineering Safety Supervision



Name : Signature : , Date : _____


Instruction given to : (Functional Stream : , Grade of TCP


Record of Referral


26

Table 5.2.3 Check List of Specific Tasks For RSE's T4 Sheet 1 of 3Type of Tasks : Engineering Safety Supervision



Name : Signature : Date,

Sharing duties of other TCPs : AP 's stream RSE's stream

ItemNo.

2.3.1

2.3.2

2.3.3

2.3.4

2.3.5

2.3.6

2.3.7

2.3.8

2.3.9

2.3.10

2.3.11

2.3.12

2.3.13

DescriptionGeneral

Check that structural works on site comply with method statements

Instruct RSE's TCPs Grade T2/T3 on aspects of work which requirespecial care and consideration

For cases where plant and machinery are supported or anchoredagainst the permanent structure or supported on a temporary structurethat affects the permanent structure and in such case, the integrity ofthe permanent structure is not maintained, check that the permanentstructure is adequate for the imposed load





Check that survey points and other geotechnical instrumentationhave been installed and are regularly monitored and results kept onsite

Check that there is no risk of artesian conditions


Check that depths of sheet pile or other vertical supporting membersare consistent with those estimated at design stage


Check that design of walings including packing and web stiffening isadequate

Check that design of props for deflection and acceptance of proploads is adequate


Satisfactory

Yes NoNot

Applicable

27

Table 5.23 Check List of Specific Tasks For RSE's T4 (Cont'd) Sheet 2 of 3Type of Tasks : Engineering Safety Supervision




ItemNo. Description

Satisfactory

Yes NoNot

Applicable

2.3.14

2.3.15


Check that as excavation proceeds, depth of sheet piles or similarvertical members are in place to sufficient depth to provide adequatecut off and lateral support below current depth of excavation byreference to original design, installation records and characteristicsof subsoil being excavated

Check that effect of groundwater table is consistent with design oftemporary works

2.3.16

2.3.17

2.3.18

2.3,19

2.3.20

2.3.21



Check that before excavation takes place the highest new deck levelis in place and has achieved sufficient strength to provide lateralprop forces

Check that during excavation there is no unexpected deflection onthe highest deck level and subsequent new floor levels

Check that at new deck levels adequate reinforcement or fixings arein place to locate, support and restrain floors at joints with walls andcolumns

Check that excavation does not proceed below defined levels or inexcess of defined bay widths


28

Table 5.23 Check List of Specific Tasks For RSE's T4 (Cont'd) Sheet 3 of 3Type of Tasks : Engineering Safety Supervision



Name : Signature : Dale :


Instruction given to : (Functional Stream : , Grade of TCP : ,


Record of Referral


Table 5.2.4

Project:

Check List of Specific Tasks For RSE's T3Type of Tasks : Routine Safety Supervision

Sheet 1 of 1

Type(s) of Works :

TCP fil

Name :

Sharing

ItemNo.

2.4.1

2.4.2

2.4.3

2.4.4

2.4.5


Signature : Date .

y duties of other T^.ps • AP'x stream RSE 's stream

DescriptionGeneral

Check that Contractor's TCPs carry out Routine Safety Supervisionitems related to :- structural support for plant and machinery- temporary works and intermediate stages of building works


Check that survey points and other geotechnical instrumentationhave been installed and are regularly monitored and the results kepton site

Check that there is no over-excavation



Check that columns are adequate to accept substructure loads andare adequately braced or restrained at all times

Satisfactory

Yes NoNot

Applicable


Instruction given to : (Functional Stream : . Grade of TCP • )

Instruction of Rectification

Record of Referral


30

Table 5.2.5

Project:

Check List of Specific Tasks For RSE's T2Type of Tasks : Routine Safety Supervision

Sheet 1 of 1

Type(s) of Works :



Sharing

ItemNo.

2.5.1

2.5.2

2.5.3

2.5.4

2.5.5

Record

Instruct

Item N<

* duties of other TCPs : AP 's stream RSE 's stream

DescriptionGeneral

Check that Contractor's TCPs carry out Routine Safety Supervisionitems related to :- structural support for plant and machinery- temporary works and intermediate stages of building works


Check that survey points and other geotechnical instrumentation havebeen installed and are regularly monitored and the results kept on site





Satisfactory

Yes

of Instruction of Rectification Works

:ion given to : (Functional Stream : , Grade

3. Instruction of Rectification

No

of TCP :

NotApplicable

}

Record of Referral


31

Table 53.1 Check List of Specific Tasks For Contractor's RepresentativeType of Tasks : Systems and Reports

Sheet 1 of 2



Name: Signature: Date:

Sharing duties of other TCPs :

ItemNo. Description

Satisfactory

Yes NoNot

Applicable

3.1,1

3.1.2

3.1.3

3.1.4

General

Check that Contractor's TCPs and sub-contractors are conversantwith DSSPs and the supporting documentation

Check that communication systems are in place with AP's and RSE'srepresentatives

Set up communication and co-ordination with safety officers andsafety supervisors

Set up procedures to check and satisfy that safety measures andsafety actions have been checked and recorded.

3.1.5

3.1.6

3.1.7

5.1.8

.1.9

Action and Reporting on Non-Conformity

Instruct subordinates and subcontractors to take action on safetyrelated matters

Instruct rectification of non-conformity

Monitor rectification measures

Report to AP's and RSE's Representatives when non-conformity hasbeen rectified

Investigate reasons for non-conformity and set up systems andprocedures to avoid future non-conformity

32

Table 53.1 Check List of Specific Tasks For Contractor's Representative (Cont'd) Sheet 2 of 2Type of Tasks : Systems and Reports







Record of Referral


33

Table 53.2

Project:

Check List of Specific Tasks For Contractor's T5Type of Tasks : Engineering Safety Supervision -

Type(s) of Works :

Sheet 1 of 4




ItemNo. Description

Satisfactory

Yes NoNot

Applicable

3.2.1

3.2.2

3.2.3

General and Minor Aspects of Building Works

General Items

Check that there is adequate installation of catch fans, catchplatforms and protection screens as necessary to secure safety againstfalling objects

Liaise with AP's and RSE's T4/T5 as applicable to check and satisfythat design assumptions are being validated on site

Assess actual site conditions encountered in relation to the DSSP;direct subordinates on priorities and identify aspects of work whichrequire special care and supervision

3.2.4

Formwork for Concrete

Check that the design and supports of formwork and shoring areadequate to support all intended loads

3.2.5

3.2.6

.2.7

Structural Support for Plant and Machinery

General

For cases where plant and machinery are supported on a temporaryelevated platform without affecting the permanent structure, checkthat the supporting structure is adequate for the imposed loads

For cases where plant and machinery are supported on or anchoredagainst the permanent structure or supported on a temporary structurethat affects the permanent structure and in such case, the integrity ofthe permanent structure is maintained, check that:- the design information is given- the permanent or temporary structure is adequate for the imposed

load- fixing and supports are secure

For cases where plant and machinery is supported on or anchoredagainst the permanent structure or supported on a temporary structurethat affects the permanent structure and in such case, the intendedintegrity of the permanent structure is not maintained, check that:- fixing and supports are secure- the temporary structure, if applicable, is adequate for the imposed

load

34

Table 5.3.2 Check List of Specific Tasks For Contractor's T5 (Cont'd) Sheet 2 of 4Type of Tasks : Engineering Safety Supervision




ItemNo.

3.2.8

3.2.9

3.2.10

3.2.11

3.2.12

3.2.13

3.2.14

3.2.15

3.2.16

3.2.17

DescriptionCranes and Hoists

Check that crane fixing and supports are secure

Man Hoists, Goods Hoists and Gondolas

Check that towers, pulleys and supporting frames are securelyattached to the building

Check that floor mounted machinery and pulleys are adequatelyfounded and secured by proper fixings

Excavation Plant and Piling Rigs

Check that if operated on ground, state of the ground is fit for useby the plant

Check that if operated on an elevated working platform, theworking platform is adequate to support the plant

Check that rigs, masts, excavator jibs and buckets do not riskstriking members of the public or road users

Stationary Plant, e.g. Compressors and Concrete Batching Plants

Check that fixed plant is securely founded and fixed

Temporary Works and Intermediate Stages

Excavation & Lateral Support


Check that as excavation proceeds, depth of sheet piles or similarvertical members are in place to sufficient depth to provideadequate cut off and lateral support below

Check current depth of excavation by reference to original design,installation records and characteristics of subsoil being excavated.

Satisfactory

Yes NoNot

Applicable

35

Table 53.2 Check List of Specific Tasks For Contractor's T5 (Cont 5d) Sheet 3 of 4Type of Tasks : Engineering Safety Supervision



Name : - Signature: Date:

ItemNo.

3.2.18

3.2.19

3.2.20

3.2.21

3.2.22

3.2.23

3.2.24

3.2.25

3.2.26

3.2.27

3.2.28

3.2.29

3.2.30

DescriptionFalsework for Elevated Structures

Check that vertical supports are adequate in section and securelyfixed for applied static and dynamic loading

Check that vertical supports are properly aligned with adequatediagonal and horizontal bracing

Check that cross members supporting deck or formwork areadequately fixed and braced to accept static and dynamic loads

Check that deck and/or formwork are adequate for applied loads






Check that restraining guy ropes and/or nets are provided beforeremoval of external walls

Check that before removal of walls, beams or columns :- all loads other than self weight are removed- slot cut is carried out- restraining guy ropes or nets are provided

Check that supporting scaffolding is provided to lower floors whereappropriate

Check that there is no excessive debris on cantilever or floor slabsand that no build up occurs against external walls

Check that provision and condition of scaffolding, catch fans,matscreens and heavy duty nylon mats, as appropriate, aresatisfactory

Check that mechanical plant is operating safely and in accordancewith method statements

Satisfactory

Yes NoNot

Applicable

36

Table 53.2 Check List of Specific Tasks For Contractor's T5 (Cont'd) Sheet 4 of 4Type of Tasks : Engineering Safety Supervision


TCP filling in this check list ~~~

Name: Signature: Date,

Item

No.

3.2.31

3.2.32

3.2.33

3.2.34

3.2.35

3.2.36

3.2.37

DescriptionSite Formation

Check that angle of cutting is within specified limits

Check that loose material or boulders are not present at the crest orintermediate benches of slopes

Check during blasting operation that protective measures are in placeand maintained

Check stability of temporary stockpiles

Check that temporary stockpiles do not surcharge slopes or retainingwalls

Check that excavation, filling or temporary stockpiles do not obstructwatercourses or drains

Inspect all boulders within 20m of crest of excavated slopes to see ifthey are stable

Satisfactory

Yes No

Not

Applicable


Instruction given to :


(Functional Stream:. ., Grade of TCP:.

Record of Referral


37

Table 533

Project:

Check List of Specific Tasks For Contractor's T4Type of Tasks : Engineering Supervision

Type(s) of Works :

Sheet 1 of 4




ItemNo. Description

Satisfactory

Yes NoNot

Applicable

3.3.1

3.3.2

3.3.3

General and Minor Aspects of Building Works

General Items


Liaise with AP's and RSE's T4/T5 as applicable to check and satisfythat design assumptions are being validated on site

Assess actual site conditions encountered in relation to the DSSP;direct subordinates on priorities and identify aspects of work whichrequire special care and supervision

3.3.4

Formwork for Concrete

Check that the design and supports of formwork and shoring areadequate to support all intended loads

3.3.5

3.3.6

.3.7


General

For cases where plant and machinery are supported on a temporaryelevated platform without affecting the permanent structure, checkthat the supporting structure is adequate for the imposed loads

For cases where plant and machinery are supported on or anchoredagainst the permanent structure or supported on a temporary structurethat affects the permanent structure and in such case, the integrity ofthe permanent structure is maintained, check that:- the design information is given- the permanent or temporary structure is adequate for the imposed

load- fixing and supports are secure

For cases where plant and machinery is supported on or anchoredagainst the permanent structure or supported on a temporary structurethat affects the permanent structure and in such case, the intendedintegrity of the permanent structure is not maintained, check that:- fixing and supports are secure- the temporary structure, if applicable, is adequate for the imposed

load

38



TCP filling in this check list ' • ~~~~


ItemNo,

3.3.8

3.3.9

3.3.10

3.3.11

3.3.12

3.3.13

3.3.14

3.3.15

3.3.16

3.3.17

DescriptionCranes and Hoists





Excavation Plant and Piling Rigs






Temporary Works and Intermediate Stages

Excavation & Lateral Support


Check that as excavation proceeds, depth of sheet piles or similarvertical members are in place to sufficient depth to provideadequate cut off and lateral support below

Check current depth of excavation by reference to original design,installation records and characteristics of subsoil being excavated.

Satisfactory

Yes NoNot

Applicable

39

Table 533 Check List of Specific Tasks For Contractor's T4 (Cont'd)Type of Tasks : Engineering Safety Supervision



Name:

Sheet 3 of 4

Signature: Date:

ItemNo.

3.3.18

3.3.19

3.3.20

3.3.21

3.3.22

3.3.23

3.3.24

3.3.25

3.3.26

3.3.27

3.3.28

3.3.29

3.3.30

DescriptionFalsework for Elevated Structures

Check that vertical supports are adequate in section and securelyfixed for applied static and dynamic loading

Check that vertical supports are properly aligned with adequatediagonal and horizontal bracing

Check that cross members supporting deck or formwork areadequately fixed and braced to accept static and dynamic loads

Check that deck and/or formwork are adequate for applied loads







Check that before removal of walls, beams or columns :- all loads other than self weight are removed- slot cut is carried out- restraining guy ropes or nets are provided



Check that provision and condition of scaffolding, catch fans,matscreens and heavy duty nylon mats, as appropriate, aresatisfactory


Satisfactory

Yes NoNot

Applicable

40



TCP filling in this check list ~~~"~

Name: Signature, Date :

Item

No.

3.3.31

3.3.32

3.3.33

3.3.34

3.3.35

3.3.36

3.3.37


Check that angle of cutting is within specified limit


Check during blasting operation that protective measures are in placeand maintained

Check stability of temporary stockpiles

Check that temporary stockpiles do not surcharge slopes or retainingwalls

Check that excavation, filling or temporary stockpiles do not obstructwatercourses or drains

Inspect all boulders within 20m of crest of excavated slopes to see ifthey are stable

Satisfactory

Yes No

Not

Applicable


Instruction given to :


(Functional Stream:. ., Grade of TCP :.

Record of Referral


41

Table 53.4

Project :

Check List Of Specific Tasks For Contractor's T3Type of Tasks : Management and Co-ordination;

Routine Safety Supervision

Type(s) of Works

Sheet 1 of 2


Name: _ Signature: Date:


ItemNo. Description

Satisfactory

Yes NoNot

Applicable

3.4.1

3.4.2

Management

Check that T1/T2 are carrying out their duties in accordance with theTechnical Memorandum and the Code of Practice for Site SafetySupervision

Check that records are properly kept

3.4.3

General


3.4.4

3.4.5

3.4.6

3.4.7

3.4.8


Check that the approved method statement is in place


Check that plans of services and adjoining foundations are available

Check that services have been located

Check that, for top down construction and before excavation takesplace, the highest new deck level is in place and has achievedsufficient strength to provide lateral prop forces

3.4.9

3,4.10

3.4.11

Site Formation

Check that prior to forecast heavy rainstorm and during rainfallevents, slopes and temporary drainage have been inspected

Check that when blasting is to be planned, all concerned havereceived adequate instructions and training and understand relevantlegislation and approved working procedures

Check that method statements have been prepared and are beingfollowed for installing rock anchors or soil nails

42

Table 5.3.4 Check List Of Specific Tasks For Contractor's T3 (Cont'd) Sheet 2 of 2Type of Tasks : Management and Co-ordination;

Routine Safety Supervision


TCP filling in this check list ~~~~~~~ —






Record of Referral


43

Table 5.3.5

Project:

Check List of Specific Tasks For Contractor's T2Type of Tasks : Routine Safety Supervision

Type(s) of Works :

Sheet 1 of 5


Name: ... Signature : Date :

Sharing duties of other TCPs :„

ItemNo.

3.5.1

3.5.2

3.5.3

3.5.4

3.5.5

3.5.6

3.5.7

3,5.8

3.5.9

DescriptionGeneral and Minor Safety Aspects

Check that there are arrangements for access and egress of vehicleswhich are satisfactory and do not endanger the public or other roadusers

Check that scaffolding is adequately secured to the building toprevent collapse

Check that the erection of hoarding and/or covered walkways hasbeen erected to secure safety of the public in accordance with thehoarding plan agreed by the Building Authority

Check that there is adequate installation of catch fans, catchplatforms and protection screens as necessary to secure safetyagainst falling objects

Formworkfor Concrete

Check that formwork for concrete is inspected by a competent personbefore pouring of concrete

Structural Erection

Check that suitable anchorage points are provided for the attachmentof safety harnesses and lifelines or a safety net is installed where thedistance of fall exceeds two meters

Check that safety lines are used to prevent any dangerous swing ofsteel works being raised or lowered by crane


Check that fixing and supports for plant and machinery are secure

Cranes and Hoists


Satisfactory

Yes No•Not

Applicable

44

Table 5.3.5 Check List of Specific Tasks For Contractor's T2 (Cont'd) Sheet 2 of 5Type of Tasks : Routine Safety Supervision


TCP filling in this check list ' ~~~~~~


ItemNo. Description

Satisfactory

Yes NoNot

Applicable

3.5.10

3.5.11

3.5.12



Check that there is free or uninterrupted passage provided forgondolas before they are moved


3.5.13

3.5.14

3.5.15

Excavation Plant & Piling Rigs

Check that if operated on ground, state of the ground is fit for use bythe plant

Check that if operated on an elevated working platform, the workingplatform is adequate to support the plant

Check that rigs, masts, excavator jibs and buckets do not risk strikingmembers of the public or road users

3.5.16



3.5.17

3.5.18

3.5.19

3.5.20

3.5.21


Check that the approved/agreed method statement is followed


Check that all columns/walls are removed at each floor level beforedemolition of lower floor


Check that before removal of walls, beams or columns, all loadsother than self weight are removed, slot cut is carried out andrestraining guy ropes are provided, where necessary

45

Table 5.3.5 Check List of Specific Tasks For Contractor's T2 (Cont'd) Sheet 3 of 5Type of Tasks : RoutiEe Safety Supervision



Name : . _ .— Signature: Date :

ItemNo.

3.5.22

3,5.23

3.5.24

3.5.25

3.5.26

3.5.27

3.5.28

3.5.29

3.5.30

3.5.31

3.5.32

3.5.33

3.5.34

3.5.35

3.5.36

DescriptionDemolition of Superstructure (Cont'd)



Check that adequate watering is provided

Check that refuse chute or refuse openings are properly located

Check that provision and condition of scaffolding, catch fans,matscreens and heavy duty nylon mats are satisfactory






Check that positions of sheet piling or other supports does notconflict with services or adjoining foundations

Check that sheet piles or other vertical members are adequatelysupported prior to and during driving


Check that pre-loading is in place, where specified

Check that king posts to lateral support systems are provided, ifrequired


Satisfactory

Yes NoNot

Applicable

46

Table 53.5 Check List of Specific Tasks For Contractor's T2 (Cont'd) Sheet 4 of 5Type of Tasks : Routine Safety Supervision


TCP filling in this check list ~~Name: Signature: Date :

ItemNo. Description

Satisfactory

Yes NoNot

Applicable

3.5.37

3.5.38

3.5.39

Excavation and Lateral Support (Contd)


Check that as excavation proceeds, depth of sheet piles or similarvertical members are in place to sufficient depth to provide adequatecut off and lateral support below current depth of excavation byreference to original design, installation records and characteristics ofsubsoil being excavated

Check that there is no instability of temporary cuttings duringintermediate stages

3.5.40

3.5.41

3.5.42

Falsework for Elevated Structures

Check that the size and arrangement of falsework members are inaccordance with the drawings, if any

Check that base plates are adequate

Check that falsework is free of risk of impact by vehicles or siteplant

3.5.43

3.5.44

3.5.45

3.5.46

3.5.47

3.5.48

3.5.49




Check that before excavation takes place that the highest new decklevel is in place and has achieved sufficient strength to provide lateralprop forces

Check that during excavation there is no unexpected deflection on thehighest deck level and subsequent new floor levels

Check that at new deck levels adequate reinforcement or fixtures arein place to locate, support and restrain floors at joints with walls andcolumns



47

Table 53.5 Check List of Specific Tasks For Contractor's T2 (Cont'd) Sheet 5 of 5Type of Tasks : Routine Safety Supervision



Name: Signature: Date :

Item

No.

3.5.50

3.5.51

3.5.52

3.5.53

3.5.54

3.5.55

3.5.56


Check that existing nullahs and watercourses are properly diverted

Check that monitoring stations are installed when necessary and thatthe readings are taken

Check that piezometers, where required, are properly covered andmaintained and readings taken at the frequency required



Prior to forecast heavy rainstorms and during rainfall events, inspectslopes to check that temporary drainage is adequate and thatunexpected channels or conduits do not develop

Check that access scaffolding for slope works is secure andperiodically maintained

Satisfactory

Yes NoNot

Applicable


Instruction given to : __ (Functional Stream:. ., Grade of TCP:.


Record of Referral

Item No Person Referred tn Functional Stream Grade of TCP

48

Table 53.6

Project:

Check List of Specific Tasks For Contractor's TlType of Tasks : Routine Safety Supervision

Sheet 1 of 5

Type(s) of Works :



Sharing duties of other TCPs :_

ItemNo,

3.6.1

3.6.2

3.6.3

3.6.4

3.6.5

3.6.6

3.6.7

3.6.8

3.6.9

DescriptionGeneral and Minor Safety Aspects

Check that there are arrangements for access and egress of vehicleswhich are satisfactory and do not endanger the public or other roadusers

Check that scaffolding is adequately secured to the building toprevent collapse

Check that the erection of hoarding and/or covered walkways hasbeen erected to secure safety of the public in accordance with thehoarding plan agreed by the Building Authority

Check that there is adequate installation of catch fans, catchplatforms and protection screens as necessary to secure safetyagainst falling objects

Formworkfor Concrete

Check that formwork for concrete is inspected by a competentperson before pouring of concrete

Structural Erection

Check that suitable anchorage points are provided for theattachment of safety harnesses and lifelines or a safety net isinstalled where the distance of fall exceeds two meters

Check that safety lines are used to prevent any dangerous swing ofsteel works being raised or lowered by crane


Check that fixing and supports for plant and machinery are secure

Cranes and Hoists


Satisfactory

Yes NoNot

AppJicabSe

49

Table 5.3.6 Check List of Specific Tasks For Contractor's Tl (Cont'd) Sheet 2 of 5Type of Tasks : Routine Safety Supervision


TCP fil

Name :

ItemNo.

3.6.10

3.6.11

3.6.12

3.6.13

3.6.14

3.6.15

3.5.16

3.6.17

3.6.18

3.6.19

3.6.20

3.6.21


Sisnntur^: Date :

DescriptionMan Hoists, Goods Hoists and Gondolas


Check that there is free or uninterrupted passage provided forgondolas before they are moved


Excavation Plant & Piling Rigs









Check that all columns/walls are removed at each floor level beforedemolition of lower floor


Check that before removal of walls, beams or columns, all loadsother than self weight are removed, slot cut is carried out andrestraining guy ropes are provided, where necessary

Satisfactory

Yes NoNot

\pplicable

50

Table 53.6 Check List of Specific Tasks For Contractor's Tl (Cont'd) Sheet 3 of 5Type of Tasks i Routine Safety Supervision



Name : Signature : , Date :

ItemNo.

3.6.22

3.6.23

3.6.24

3.6.25

3.6.26

3.6.27

3.6.28

3.6.29

3.6.30

3.6.31

3.6.32

3.6.33

3.6.34

3.6.35

3.6.36

DescriptionDemolition of Superstructure (Cont'd)



Check that adequate watering is provided

Check that refuse chute or refuse openings are properly located

Check that provision and condition of scaffolding, catch fans,matscreens and heavy duty nylon mats are satisfactory






Check that positions of sheet piling or other supports does notconflict with services or adjoining foundations

Check that sheet piles or other vertical members are adequatelysupported prior to and during driving


Check that pre-loading is in place, where specified

Check that king posts to lateral support systems are provided, ifrequired


Satisfactory

Yes NoNot

Applicable

51

Table 5.3.6

Project:

Check List of Specific Tasks For Contractor's Tl (Cont'd) Sheet 4 of 5Type of Tasks : Routine Safety Supervision

Type(s) of Works :

TCP filling in this check listName: — Signature : Date :

ItemNo. Description

tisfactor

Yes NoNot

Applicable

3.6.37

3.6.38

3,6.39



Check that as excavation proceeds, depth of sheet piles or similarvertical members are in place to sufficient depth to provide adequatecut off and lateral support below current depth of excavation byreference to original design, installation records and characteristics ofsubsoil being excavated

Check that there is no instability of temporary cuttings duringintermediate stages

3.6.40

3.6.41

3.6.42

Falsework for Elevated Structures

Check that the size and arrangement of falsework members are inaccordance with the drawings, if any

Check that base plates are adequate

Check that falsework is free of risk of impact by vehicles or siteplant




Check that before excavation takes place that the highest new decklevel is in place and has achieved sufficient strength to provide lateralprop forces

Check that during excavation there is no unexpected deflection on thehighest deck level and subsequent new floor levels

Check that at new deck levels adequate reinforcement or fixtures arein place to locate, support and restrain floors at joints with walls andcolumns



3.6.43

3.6.44

3.6.45

3.6.46

3.6.47

3.6.48

3.6.49

52

Table 5.3.6 Check List of Specific Tasks For Contractor's Tl (Cont'd) Sheet 5 of 5Type of Tasks : Routine Safety Supervision

Project : Type(s) of Works :



ItemNo. Description

Satisfactory

Yes NoNot

Applicable

3.6.50

3.6.51

3.6.52

3.6.53

3.6.54

3.6.55

3.6.56

Site Formation

Check that existing nullahs and watercourses are properly diverted

Check that monitoring stations are installed when necessary andthat the readings are taken

Check that piezometers, where required, are properly covered, andmaintained and readings taken at the frequency required



Prior to forecast heavy rainstorms and during rainfall events,inspect slopes to check that temporary drainage is adequate and thatunexpected channels or conduits do not develop

Check that access scaffolding for slope works is secure andperiodically maintained


Instruction given to : '.


(Functional Stream;.. ., Grade of TCP:.

Record of Referral


53

6 Assessment of Degree of Complexity

Content

6.1 This section explains how the complexity of the building works or street

works is to be dealt with and provides guidance on the descriptive parts of

the Outline Safety Supervision Plan (OSSP) and Detailed Safety

Supervision Plan (DSSP).

Site Description (OSSP)

6.2 Item 1 (i) of the OSSP requires the AP to give a general description of the

works which are to be carried out. The OSSP will be drawn up at an early

stage of the construction process and it is important that the general

description covers the whole of the works which are contemplated at the

time. If the nature of the works changes, then revised OSSPs should be

submitted.

6.3 Item l(ii) requires the AP to give the full address of the site and item l(iii)

requires the Lot Number to be identified. If only part of the site is to be

developed at that time then a reference should be made to this effect on

the Project Location Drawing which is required to be submitted in

Appendix A to the OSSP.

Special Features

6.4 Any special features associated with the site need to be identified in the

OSSP. It is not necessary to explain the significance of special features or

to give advice on how to deal with them. To assist the AP and his

professional advisors in completing the OSSP, a list of typical special

features is set out in Table 6.1 and the OSSP proforma provides a check

list which is to be completed by the AP,

54

6.5 Table 6.1 introduces the special features through a list of questions. If the

answer to any of the questions is positive then the AP with his advisors

should identify the feature and put a tick in the respective box in the

proforma.

Site Description (DSSP)

6.6 Item (1) of the DSSP requires the AP to describe the scope of the works

providing details of the address and lot number. Item l(iv) requires that

the site of the works should be shown on a Works Site Drawing enclosed

in Appendix 1.1 to the DSSP. Revised DSSPs referring to changes to the

works may be referenced to a previous Works Site Drawing.

6.7 Under item l(v), the AP is to list the type of works covered by the DSSP

together with the Type of Plans and approval dates.

6.8 As it will be the usual case that consent is sought and given for only a part

of the whole project works, it is important that Item 1 of the DSSP clearly

defines the extent of the works which are to be supervised and that

amended DSSPs clearly set out the nature and scope of the changes to the

works.

OSSP and Consent

6.9 Item 2 of the DSSP requires the AP to refer-to the OSSP which covers the

works and also that he lists the consents which have been issued to

commence other types of building works or street works within the same

site.

Appraisal of Special Hazards

6.10 The AP is required to submit with his DSSP an appraisal of special

hazards arising out of the listed features. The purposes of this list are to

prepare the grounds for the assessment of the degree of complexity of the

works and to assist TCPs in appreciating the special features of the works

55

and aspects which require special care in supervision. From this part of

the DSSP there is a prompt or reminder to the contractor to assist him in

considering the need for method statements and precautionary and

protective measures. Further details are set out below.

6.11 In respect of the site under item 3(i) of the AP's DSSP, the AP and his

professional advisers should describe in Appendix 1.2 the site in terms of:

• its area;

® approved access points;

•. right of way, if any, that have to be maintained through the site;

« presence of services through the site which have to be protected;

• presence of nullahs or watercourses which have to be maintained in

use.

6.12 In respect of adjacent buildings, slopes, streets and lanes under item 3(ii)

of the AP's DSSP, the AP and his professional advisers should describe,

in Appendix 1.2, all the surrounding features which might be affected by

the works in order to assist the contractor in drawing up precautionary and

protective measures. The description of buildings, slopes, streets and

lanes should include general notes on condition and aspects which have to

be taken into account in planning the works. This section should note the

presence of shallow foundations to adjoining buildings, if known.

6.13 The critical stages of the building works under item 3(iii) of the AP's

DSSP should also be set out in Appendix 1.2, in order that TCPs can plan

their visits and increase the frequency of inspection, if necessary, so as to

provide stringent supervision during the critical stages. The list of critical

stages of the building works and the additional supervision requirements

are set out in Section 8 of this Code of Practice.

56

6.14 The sequence of the proposed buildings works under item 3(iv) of the

AFs DSSP should be described in Appendix 1.2 with special.attention to:

• special programming requirements;

• parts or elements of the works which have to be carried out in a set

sequence;

• parts of the works or other completed works which will be occupied

while the subject works are being constructed;

© details of adjacent works which rely on the completion of the subject

works for support and which will be started during construction of the

works;

• parts of the site or existing buildings which will remain in use during

part or all of the time during which the works will be constructed;

• arrangements for phased handover of the subject works.

6.15 If the sequence of the proposed building works is detailed in prescribed

plans, referral to this plan numbers with the approval dates will be

considered acceptable.

6.16 In respect of the structural design of the building works under item 3(v) of

the AP's DSSP, the AP and his professional advisers should state the

standards, codes and any other relevant guidelines adopted in the

structural design.

Project Attributes Score Sheet

6.17 For each of the types of works listed in the Technical Memorandum, a

standard pro forma known as the Project Attributes Score Sheet (PASS) has

been produced. The PASS allows an assessment of the scale of works and

an assessment of the degree of complexity of the works by quantifying the

level of difficulty of the works and the level of risk associated with the

works. Proformas of these PASSes are provided in the Appendix to this

Section.

57

Pile wall may be part of site formation works and also part of excavation

and lateral support works. In such a case, the consent procedures will

require separate consent to commence the pile wall and then the remainder

of the works. When consent is applied for, the relevant PASS should be

used.

6.18 The AP is responsible for completing the PASS, Where appropriate, the AP

can seek advice from the RSE and other professionals such as his

geotechnical consultant. Prior to completing the relevant PASS for the

building works or street works, the AP needs to address any special features

and hazards associated with the works.

Difficulty

6.19 The criteria used to assess the level of difficulty associated with the works

are set out in the relevant PASS. These criteria can be related to the

particular form of the works, or related to installation procedures, involve

special building materials or be associated with the specified requirements

for specific items. Reference should also be made to special features and

hazards in case these contribute to difficulty as well as risk. When

completing this section of the PASS, the AP is required to select all items

relevant to the works, The individual scores associated with each selected

item are then summed to give an overall score for the level of difficulty.

Risk

6.20 The criteria used to assess the level of risk associated with the works are set

out in the relevant PASS. On-site and off-site risks need to be considered.

These risk criteria can refer to special requirements associated with

executing the works, the location of the works, specified distances or the

presence of particular features on or close to the site. When completing this

section of the PASS the AP is required to select all items relevant to the

works, and determine the sum of the individual scores to give an overall

complexity score for the level of risk.

58

Degree of Complexity of the Works

6.21 Five degrees of complexity associated with building works or street works

have been described in the Technical Memorandum as follows:

a) straightforward works are classed as degree of complexity 1;

b) moderately complex works are classed as degree of complexity 2;

c) complex works are classed as degree of complexity 3;

d) very complex works are classed as degree of complexity 4; and

e) extremely complex works are classed as degree of complexity 5.

6.22 The degree of complexity of the works is obtained from the relevant PASS

by adding together the scores for difficulty and risk. This score from the

PASS is related to the degree of complexity of the works as set out in Table

6.2.

59

Table 6.1 General list of special features

The following items should be regarded as a checklist of special features whichshould be taken into consideration when completing the outline safetysupervision plans.

1. Topography 1.1 Is there a major change in level within oracross the site?

1.2 Is there a major change in level within10m of the site boundary?

1.3 Is it expected that there will be basementstructures within the project?

1.4 Is the site on steeply sloping ground suchthat local failures or instability mighthave effects upslope or downslope

2. Geotechnical setting 2.1 Is there presence of the followingpotentially unfavorable exposures?a) fill;b) marine mud;c) abrupt weathering changes;

2.2 Is there presence of unfavorablediscontinuities in rock face?

2.3 Is the designed groundwater near theground surface?

2.4 Is the site close to or affected by anexisting water course?

2.5 Is the site affected by an upstreamcatchment area?

2.6 Will it be necessary to arrange temporaryor permanent diversion of water coursesaround or within the site?

60

6.1 Genera! list of features (Cont'd)

3. Location in scheduledareas

Is the site located in scheduled areas?

4. Presence of services Are any of the following present in the vicinityof the site and could they affect or be affectedby the works?a) Water mains exceeding 75mm in

diameter

b) Gas mains

c) Drainage pipes exceeding 200mm indiameter

d) Underground electricity cables

e) Overhead cables

5. Construction sequenceand programme

5.1 Is there any top-down method ofconstruction?

5.2 Is there any requirements for shrinkagestrip?

5.3 Is there any construction or demolition ofcantilever over street?

6. Presence of buildingsolder than 40 years inthe vicinity

Is there presence of buildings older than 40years in the vicinity of the site?

7. Adjacent buildings inpoor condition

Are there any buildings in poor conditions inthe vicinity of the site?

Are there any conditions imposed by theBuilding Authority under section 17 of theBuildings Ordinance?

8. Conditions imposed bythe Building Authorityunder section 17 of theBuildings Ordinance

61

Table 6.2 Relationship between the project attributes score and the

degree of complexity of the works

Description of

Complexity of Works

Straightforward

Moderately complex

Complex

Very complex

Extremely complex

Degree of Complexity

of Works

1

2

3

4

5

Project Attributes

Score

0-20

21-40

41-60

61-80

81-100

62

Appendix to 6

Project Attributes Score

• Demolition Works

• Ground Investigation Works

• Foundation Works

• Site Formation / Slope / Retaining Wall / Strengthening / Buried Services

Repair Works

• Excavation and Lateral Support Works

• Cap / Footing / Basement Works

• Superstructure Works

• Curtain wall / Cladding Work

• Alteration and Addition Works

® Street Works

Explanatory Notes

1. A score should be assigned to each item marked thus "O" when thecriteria listed under that item are met.

2. For some items under which several criteria are listed, only the criterionthat attracts the highest score should be selected and the correspondingscore assigned.

3. The selected scores should be circled to identify the criteria that are met.

4. Some of the term used in the Project Attributes Score Sheets are definedas follows:•' "crest of cutting" is at the intersection between the cut slope and the

natural slope.• "pile maximum linear dimension'V denoted by d, is the maximum

linear dimension along any direction measured on the pile horizontalcross section. For a circular pile, this is the diameter; for a rectangularpile, this is the diagonal; for a sheet pile, this is the width.

• "depth of excavation", denoted by e, refers to the vertical distancemeasured from the highest ground level that abuts the pile wall to theproposed lowest bulk excavation level.

63

Project Attributes Score Sheet for Demolition Works Sheet 1 of 2

If more than one item is applicable under one attribute, score will be assigned to only theitem with the highest score.

AssignedScore

1. Difficulty

O Type of construction materials

Reinforced concrete structureTimber flooring/roofMasonry structure - - -Precast / prefabricated structureComposite / steel structurePanel glass structure -Prestressed concrete structure - -

O Special structural elements

Flat slab -Waffle slab - -Beam exceeding 12m in spanWall / column exceeding 6m in storey heightJetty or alikeHanging structure or alike - - - - -Transfer structure or alikeCabled structure or alikeArch structure or alikeOil storage structure or alike - - - - -

O Demolition method

By hand held tool - -By heavy mechanical plant on floor - ~By hydraulic crusher with long arm boomBy wrecking ball - -By implosion -

2. RiskSub-total (A)

O Nearest distance of demolition works from the site boundary, sl m < s < 6 m - _Om < s < 1mProjection over street/footpath

O Height of building to be demolished, hd

10m<hd<50m50m <hd

5101015151520

555

10101515151515

510151515

51015

510

64

Project Attributes Score Sheet for Demolition Works Sheet 2 of 2

O Special element

External finCladding/curtain wall -~ ~ ~ - -Bay windowCantilever structure with span exceeding 1.5m

55

1010

O Near the site

Presence of slope at an average gradient greater than 30° andexceeding 7.5m in height within 5m of the site boundaryPresence of retaining wall greater than 6m in retained heightwithin 5m of the site boundary - - - -Presence of prewar buildings or building in poor conditionsadjoining the site -Presence of party wall structures adjoining the site - -

5

5

55

O Existing structure within the site and retaining a ground leveldifference, h

3m < h < 7.5m

Sub-total (B)

Complexity Score (A) + (B)

3. ScaleTotal floor area to be demolished, Ad (m2)

510

Scale Factor = Ad / 2000m2

AssignedScale Factor

(rounded up to one decimal point and subject to a maximum of 2)

65

Project Attributes Score Sheet for Ground Investigation Works Sheet 1 of I


1. Difficulty

O Sinking borehole with foam as flushing media behind retainingwall within a horizontal distance equal to the height of the retainingwall.

O Sinking borehole on slope at average gradient, 9 and theborehole located at more than 5m above slope toe :

15°<e<30° •30° < 9 < 45°45°<0<60°60° <e

Sub-total (A)

10

10253040

AssignedScore

2. Risk

O Sinking borehole within 5m of an existing building

O Sinking borehole within 5m of MTR structure

O Sinking borehole at the top of an existing retaining wall andwithin a distance equal to the retained height, hw:

3m< hw < 6m6m <hw

O Sinking borehole at the uphill side of slope crest and withina horizontal distance from the crest equal to the vertical height ofslope with average gradient 9 :

30°<9<45°45° < 9

Sub-total (B)


3. ScaleNumber of boreholes, N :

Scale Factor = N/100.


5

75

1020

510


66

Project Attributes Score Sheet for Pile Foundation Works Sheet 1 of 2


1. Difficulty

O Size of pile with maximum linear dimension d,400mm<d< 750mm750mm < d < 2000mm - - ~ ~ ~ -2000mm <d

O Method of installationPercussive and without prescription of predrilling toovercome underground obstructions - - -Non-percussive with casing - - - - - -Percussive with prescription of predrilling to overcomeunderground obstructions - -Non-percussive without casing - - - - - -

O Pile foundation works at more than 5m above slope toe withmaximum linear dimension, d, on slope at an average gradient, 0,

d<400mm and 15°<9<30°d< 400mm and 30°<9<45° ~~ - - -d< 400mm and 45° < 9 - -

d> 400mm and 15°<9<30°d>400mm and 30°<9<45°d> 400mm and 45° < 9 -- «

Sub-total (A)

2. Risk

O Presence of vulnerable features within 5m of the pile foundationworks

Presence of high voltage cable -Presence of gas main - - '• - - ~- - ~ -Presence of footpathPresence of building / elevated structure on pile foundation

Presence of carriageway •Presence of watermain with diameter exceeding 75mmPresence of building / elevated structure on shallow footingPresence of MTR underground structure

O Pile foundation works with pile maximum linear dimension, d,(i) At the uphill side of slope crest and within a horizontal

distance from the crest equal to the vertical height of slopeand/or

Score

51015

55

1015

51015

101520

AssignedScore

5555

10102020

67

Project Attributes Score Sheet for Pile Foundation Works Sheet 2 of 2

(ii) At the top of retaining wall and within a horizontal distancefrom the wall equal to the retained height

d < 400mmd > 400mm


3. ScaleCost of the works, C :

Sub-total (B)

Scale Factor = C/$100M


1530


68

Project Attributes Score Sheet for Insinuating of pile wall (steelchannel planking, sheet piling, pipe piling, sollder piling, bored piling,diaphragm wall or alike and / or grouting) In Site Formation orExcavation and Lateral Support Works

Sheet 1 of 2


1. Difficulty

O Size of pile with maximum linear dimension d,400mm < d < 750mm - - - - -750mm < d < 2000mm2000mm <d

O Method of installationPercussive and without prescription of predrilling toovercome underground obstructionsNon-percussive with casing ~ - - ~ •-»Percussive with prescription of predrilling to overcomeunderground obstructionsNon-percussive without casing

O Pile wall works at more than 5m above slope toe withmaximum linear dimension, d, on slope at an average gradient, 0,

d<400mm and 15°<9<30°30°<9<45°45° < e ' - - -15°<0<30° -30°<9<45°45° < 8

d < 400mmd < 400mmd > 400mmd > 400mmd > 400mm

andandandandand

Sub-total (A)

2. Risk

O Presence of vulnerable features within 5m of the pile wallworks

Presence of high voltage cablePresence of gas mainPresence of footpath - ~ . . - -Presence of building / elevated structure on pile foundationPresence of carriagewayPresence of waterrnain with diameter exceeding 75mmPresence of building / elevated structure on shallow footingPresence of MTR underground structure

Score

51015

55

1015

51015101520

Assigned

555510102020

69

Project Attributes Score Sheet for installing of pile wall (steel Sheet 2 of 2channel planking, sheet piling, pipe piling, solider piling, bored piling,diaphragm wall or alike and / or grouting) in Site Formation orExcavation and Lateral Support Works

O Pile wall works with pile maximum linear dimension, d,(i) At the uphill side of slope crest and within a horizontal

distance from the crest equal to the vertical height of slopeand/or

(ii) At the top of retaining wall and within a horizontal distancefrom the wall equal to the retained height

d < 400mm 75d > 400mm 30

Sub-total (B)


3, ScaleCost of the works, C : $


Scale Factor = C / $ 100M


70

Project Attributes Score Sheet for Site Formation Works, Slope / Retaining Wall /Strengthening Works or Buried Services Repair Works (excluding pile wall) Sheet 1 of 2


Score1. Difficulty

O 1) Cutting in soil greater than 30° and height exceeding 7.5m butnot greater than 15m 5

2) Cutting in soil greater than 30° and height exceeding 15m 10

O Cutting in RockWithout blasting ~ - - 5With blasting - 10

O 1) Soil/Rock fill slope greater than 30° and height exceeding 7.5mbut not greater than 15m 5

2) Soil/Rock fill slope greater than 30° and height exceeding 15m 10

O Tie back/rock dowel in slope and/or retaining wallWithout prestress 10With prestress 20

Sub-total (A)

AssignedScore

2. Risk

O Presence of vulnerable features at the crest or the toe of a proposedcutting and within a horizontal distance from the crest or from thetoe equal to the vertical height of cutting

Presence of gas main - .- ••- - 10Presence of footpath or street 10Presence of building / elevated structure on pile foundation 10Presence of sewage tunnel 10Presence of carriageway - ~ - -.- ' . - • • ~ ~ 20Presence of slope with gradient greater than 30° and heightgreater than 7.5m 20Presence of watermain with diameter exceeding 75mm 30Presence of building / elevated structure on shallow footing 40Presence of retaining wall with height greater than 3m 30Presence of MTR underground structure 50

Sub-total (B)


.71-

Project Attributes Score Sheet for Site Formation Works, Slope / Wall /Strengthening Works or Buried Services Repair Works (excluding pile wall) Sheet 2 of 2



Scale Factor = C/S100M


72

Project Attributes Score Sheet for Excavation and Lateral SupportWorks (excluding pile wall)

Sheet 1 of 2


Score1. Difficulty

O Depth of excavation, e4.5m<e<7.5m - 57.5m<e<12m 1012m<e<18m 2018m<e 30

O Special featuresDesigned ground water level above proposed lowest bulkexcavation level - , 5Requirement for installation of lagging - - 5Requirement for pressure grouting - 10Preloading of strut 20Requirement for tie back . 20

Sub-total (A)

2. Risk


Presence of gas main - 10Presence of footpath 10Presence of building / elevated structure on pile foundation 10Presence of sewage tunnel ~ - 10Presence of carriageway 20Presence of slope with gradient greater than 30° and heightgreater than 7.5m - 20Presence of watermain with diameter exceeding 75mm - - 30Presence of retaining wall with height greater than 3m 30Presence of building / elevated structure on shallow footing 40Presence of MTR underground structure 50

AssignedScore

Sub-total (B)


73

Project Attributes Score Sheet for Excavation and Lateral Support Sheet 2 of 2Works (excluding pile wall)

3, ScaleCost of the works, C : $ [, _




Project Attributes Score Sheet for Gap, Footing or Basement Works Sheet 1 of 2


1. Difficulty

O Depth of excavation, e4.5m < e < 7.5m7.5m<e< 12m12m<e<18m18m <e

O Special features

Designed ground water level above proposed lowest excavation

Requirement for installation of laggingPreloading of strutRequirement for pressure groutingRequirement for tie back _ - -

Sub-total (A)

2. Risk


JL resence 01 gas main ""~ ~ - " '"*"* ~""Presence of footpath - -Presence of building / elevated structure on pile foundation -Presence of sewage tunnel - - - - - _ - _ _ . _Presence of carriageway - - - - - - -Presence of slope with gradient greater than 30° and heightgreater than 7.5m - - - - - - - -Presence of watermain with diameter exceeding 75mm - -Presence of retaining wall with height greater than 3mPresence of building / elevated structure on shallow footingPresence of MTR underground structure - : - - - -

Sub-total (B)

Score

5102030

510151520

1010101020

2030304050

AssignedScore


75

Project Attributes Score Sheet for Cap, Footing or Basement Works Sheet 2 of 2

3, ScaleCost of the works, C :




76

Project Attributes Score Sheet for Superstructure Sheet 1 of 2


1. Difficulty

O Limit state design method

O Construction MaterialsStructural steel or composite constructionConcrete grade > 45DPrestressed concreteTimber

O Structural ElementsFlat slab - - -Waffle slab, ribbed or hollow block slabCantilever structure exceeding 1.5m spanTransfer structure

Score

10101515

5101520

AssignedScore

O Span of beam, L12m<L<18m18m <L

2. Risk

Sub-total (A)

510

O Maximum building height, hb

30m <h b < 100m100m <h b < 200m200m <hb

O TopographyPresence of slope at an average gradient greater than 30° andexceeding 7.5m in height within the sitePresence of retaining wall greater than 6m in retained heightwithin the site

O Presence of vulnerable featuresPresence of building within 5m of the worksPresence of public road adjoining the works

Sub-total (B)

J1020

15

15

1515


77

Project Attributes Score Sheet for Superstructure Sheet 2 of 2

3. ScaleConstruction floor Area, Ac (m ) :

Scale Factor = Ac / 50000m



78

Project Attributes Score Sheet for Curtain Sheet 1 of 1

If more than one item is applicable under one score will be assigned to only theitem with the highest score.

1. DifficultyScore

AssignedScore

O Method of fixingFixing by cast-in anchorFixing by being welded to a structural steel memberFixing by drill-in anchor - - - ~ -Fixing by structural sealant on all sides

Sub-total (A)

2. Risk

O Nearest distance of curtain wall/cladding works from the siteboundary, s

6 m < s < 1 2 m1m < s < 6m -•• • - -•-Arm ^ o *x' 1 tvi -~UII1 _i o v* I ill '

Projection over street/footpath - - -

O Maximum installation height, hi5m < hi < 15m15m<hi<50m

Sub-total (B)


3. ScaleAggregate Surface Area, As (m )

5101550

5101520

5152030


Scale Factor = As / 10000m


79

Project Attributes Score Sheet for Alteration and Addition Works < Sheet 1 of 2

If more than one item is applicable under one attribute, score will be assigned to only the

item with the highest score.

1. Difficulty

O Type of constructionRecasting of concrete element - - ~~ -

Use of weldingUse of anchor boltUse of structural steel or other structural metal

Score

551020

AssignedScore

O Construction of special structural element

Hanging StructureTransfer StructureCantilever Structure

2. Risk

Sub-total (A)

101530

O Nearest distance of alteration and addition works from the publicarea, s

6m<s<12m1 TTI ^ ^ <?*" ^Ttt - •'-•'"•'•

O m < s < l m . . „ - . . ._ . ..... .... .„,,

Projection over street/footpath

O Demolition of Structural element^llaH nf prvntinnmiQ Qnan

Continuous beam - - - - - - - -Column -Structural wall

Sub-total (B)

Complexity Score (A) + (B) •

5101520

5102030

\ \

80

Project Attributes Score Sheet for Alteration and Addition Works Sheet 2 of 2

3, ScaleCost of the works, C :


Scale Factor = C/$50M


For Alteration and Addition works which are structurally independent from the existing building,the score sheet to be used will be the corresponding sheet for the appropriate type of works.

81

Project Attributes Score Sheet for Street Works Sheet 1 ofl

If more than one item is applicable under one score will be assigned to only theitem with the highest score.

1. Difficulty

•O Type of constructionRigid pavement - -Flexible pavement

O Requirement for traffic diversion

O Requirement for drainage works with pipe size, p300mm < p < 525mm - ....... - ..............p

Sub-total (A)

2. Risk

O Presence of vulnerable features within 5m of the street worksPresence of watermain with diameter exceeding 75mmPresence of gas main .....................Presence of building on shallow footingPresence of pre-war buildingPresence of MTR structure - - - ~ ......... ......

Sub-total (B)



Scale Factor = C / $20M


Score

520

20

510

1020203050

AssignedScore


82

7 Supervision Requirements

Contents

7.1 This section explains how to assess the class of supervision having

determined the degree of complexity. Guidance is given on how to

combine different types of works and how to deploy staff flexibly. The

procedures are summarized in Chart 7.1.

Selecting the appropriate class of supervision

12 Six classes of supervision, denoted A to F, have been established in the

Technical Memorandum,, with class A as the lowest class of supervision and

class F as the highest class of supervision

Class of Supervision Related to Degree of Complexity

7.3 Certain types of works are known to generate more non-conformity than

others. The types of works which are considered to have similar degrees of

concern are grouped into categories as indicated in Table 7.1. A form of

stepped weighting has been introduced such that excavation and lateral

support works, by way of example, have been stepped up by three classes of

supervision to reflect their nature and the possible consequences of non-

conformity. Works which are known to be of less concern, such as ground

investigation and streetworks, have been given low classes of supervision

for the same degrees of complexity. Consequently, the class of supervision

is related not only to the degree of complexity of the works but also to the

type of building or street works.

7.4 Having assessed the degree of complexity of the works, the appropriate

class of supervision can be read directly from Table 7.1 for each type of

works.

83

Determining numbers ofTCPs and frequency of inspection visits

7.5 The initial TCP requirements for each functional stream for each class of

supervision are set out in Table 1 of the Technical Memorandum and

Table 1 also indicates the minimum frequency of inspection. Later

Sections of this Code of Practice explain how resources are to be

increased for large scale works and for critical stages of the works.

TCP qualifications and experience

7.6 The minimum qualifications and experience required for each grade of

TCP are summarized in Table 2 of the Technical Memorandum. Any

persons who satisfy these qualification and experience requirements can

be employed as relevant grades of TCP for site safety supervision

purposes.

7.7 The academic qualifications specified for each grade of TCP must have

been obtained in the appropriate disciplines.

7.8 The academic qualifications that are acceptable for TCPs of grades Tl to

T3 should be in the disciplines set out in Table 7.2.

7.9 Recognition of TCPs' academic qualifications should be based on the

following principles:

(a) Diplomas and certificates must have been awarded by Technical

Institutes which are approved and/or recognized by the Vocational

Training Council.

(b) Higher diplomas and higher certificates must have been awarded

by Technical Colleges which are approved and/or recognized by

the Vocational Training Council.

(c) Bachelor degrees and higher degrees must have been awarded by

universities funded by the University Grants Committee or

recognized by the Hong Kong Institute of Architects, the Hong

Kong Institution of Engineers or the Hong Kong Institute of

Surveyors.

84

(d) For the purpose of this Code of Practice, degrees awarded by

universities or institutes other than those mentioned in (c) above

are classified as higher diplomas.

(e) For the purpose of this Code of Practice, non graduate vocational

qualifications awarded by institutions other than those mentioned

in (a) and (b) above are subject to the agreement of the Building

Authority.

7.10 For TCPs relying on professional qualifications, Table 7.3 sets out

appropriate disciplines.

7.11 In accordance with Table 2 of the Technical Memorandum, T4 may be a

degree holder in a recognized subject with total relevant working

experience of not less than 4 years. Such recognized subject means civil,

structural or geotechnical engineering.

7.12 TCP candidates who have corporate membership of the Hong Kong

Institute of Clerks of Works or the Chartered Institute of Building may be

appointed to T3 posts provided that their experience is satisfactory. A

person who is included in the list of Registered Structural Engineers kept

under the Buildings Ordinance is deemed to be acceptable to be T4 or T5.

7.13 In addition to academic and/or professional qualifications, TCPs are

required to have relevant working experience. The minimum number of

years of relevant working experience for each grade of TCP is stipulated

in Table 2 of the Technical Memorandum. Relevant working experience

is calculated as the sum of the number of years of relevant working

experience gained post qualification and half the number of years of

relevant working experience gained prior to qualification.

85

7.14 Further guidance is given below on the aggregation of relevant

experience:

for Tl -

(ii) forT2-

The relevant experience must have been

gained within the previous 5 years and at

least 1 year of experience must be local site

experience.

Similar to Tl but the experience must be

closely related to the specialist work

category concerned.

(iii) forT3- The relevant experience must have been

gained within the previous 5 years, 2 years

of experience must be local experience,

covering a minimum of 3 types of building

works, and 1 year must be on site.

(iv) forT4andT5- Similar to TL

7.15 It is recognized that at the initial stage of the implementation of the

supervision plan system there may not be sufficient qualified supervisory

personnel who have acquired the required qualifications and experience of

the various grades of TCPs. Therefore, a transitional period as described

in sections 4.6 and 4.7 will be introduced. During the transition period, for

some grades of TCP the absence of. specified qualifications may be

compensated for by extra relevant experience or the lack of sufficient

experience may be compensated for by higher qualifications :

86

Type

of

TCP

Tl

T2

T3

T4

T5

Qualifications and experience which satisfy requirements

for each type of TCP during transition period

No

Formal

Training

Academic Qualification

Certificate Diploma Higher

Certificate

Higher

Diploma

Bachelor

or Higher

Degree

Professional

Qualification

RPE

Equivalent Years of Experience

5

8

12

N/Q

N/Q

2

4

8

N/Q

N/Q

2

4

8

N/Q

N/Q

1

3

5

N/Q

N/Q

1

3

5

N/Q

N/Q

1

1

3

4

N/Q

1 *

1 *

3 *

4 *

5 *

Note:

NQ

Relevant experience obtained before the Professional

Qualification is acceptable

Not qualified

7.16 From time to time the Building Authority may give guidance on bridging

measures which allow competent persons who do not meet the set criteria

to work towards the designated standards. Proposals of acceptance and

upgrading of various levels of qualifications and experience together with

approved topping-up training requirements are to be provided in PNAPs

andPNRCs.

87

Adjustment to supervision resources

7.17 After abstracting the notional supervision resources from Table 1 of the

Technical Memorandum, it may be appropriate to make adjustments to

cover:

• the scale of the works;

© combination of TCPs;

• combination of supervision plans for more than one type of

building works.

Scale of the Works

7.18 As explained in Section 4 above, the effects of the scale of the works, are

considered separately from the complexity of the works. It is necessary to

assign characteristics which may be used to assess the scale of the works

and a list of such characteristics to be used for the assessment of the

various types of building works and streetworks is set down below:

Type of Building Works/Street Works

demolition

ground investigation

site formation

slope/retaining wall/buriedservices repairs

excavation & lateral support

foundation

cap/footing/basement

superstructure

curtain wall/cladding

addition & alteration

street works

Characteristic to be used forAssessment of Scale

maximum floor area of thebuilding to be demolished atone time

number of boreholes

cost

cost

cost

cost

cost

construction floor area

aggregated surface area

cost

cost

88

For each type of building works the appropriate Project Attributes Score

Sheet will list various values of scale factor S for various values of the

characteristics.

7.19 From time to time, the Building Authority will review and amend the

characteristic values to be adopted as benchmarks for various levels of

scale factors.

7.20 Scale factor may be defined as a ratio of the estimated value of the

characteristic chosen to assess the scale of the building works or street

works versus a scale factor of unity. The scale factors are capped at 2,

7.21 The basis of the scale assessment is that for a scale factor of unity, a full

day is expected to be devoted to inspection on each occasion that the site

is visited by a TCP except when the TCP needs to undertake Level 5 - full

time supervision.

7.22 Scale factors of more than 1 would attract extra supervision input which

would be provided by increasing the frequency of inspections or by

increasing the numbers of TCPs. Scale factors of less than 1 would allow

visits of duration less than one full day but at the same frequency. The

minimum frequency of visits as set out in the Technical Memorandum

may not be reduced.

7.23 When the scale factor exceeds unity, the scale factor may be applied in

two ways to increase the level of supervision input in addition to the base

level provided in Table 1 of the Technical Memorandum.

These are:

(a) to upgrade the level of supervision carried out for each grade of TCP

which is listed in Table 1 in the Technical Memorandum for that

class of supervision; and

89

(b) to increase the number of TCPs required to carry out full time

supervision.

7.24 The frequency levels of inspection, 1 to 5 listed in the Technical

Memorandum, can be quantified in terms of man-days per month as

shown in Table 7.4. As there is a significant difference in input between

levels 4 and 5, further guidance is give in Table 7.5 which subdivides

level 4 to take into account circumstances where more frequent

inspections are required.

7.25 The adjusted supervision input expected from a grade of TCP is the

product of the scale factor and the figures in Table 7.4. If the duties of

TCPs are not to be combined and if the supervision plan is not to be

combined with others, the process of the adjustment is best carried out

using Table 7.6 as follows:

(i) Read the required frequency level of site inspection for a grade of

TCP for the particular Class of Supervision from Table 1 of the

Technical Memorandum and enter into column (1) of Table 7.6.

(ii) Convert this figure to man-days per month, by reference to Table

7.4 and enter into column (2).

(iii) Multiply that figure by the scale factor, S, in order to calculate a

revised figure of man-days per month and enter this figure into

column (3).

(iv) Repeat this process for the other grades involved.

(v) Having calculated the scale enhanced supervision requirements in

man-days per month, take each grade of TCP in turn and with

reference to tables 7.4 and 7.5 assess the best combination in terms

of numbers of TCPs of that grade and the frequency of site visits

to fill in columns (4) and (5).

90

7.26 For full time TCPs, if the scale factor of the works does not exceed 1, full

time attendance is still required to provide continuous supervision. For

full time assignments with scale factors exceeding 1, the number of full

time TCPs is to be increased or the required supervision input extra over

that by one full time TCP is to be combined with that of other higher

grade TCPs.

Principles of Combination of Supervision Resources

7.27 It is common practice to submit, under the Buildings Ordinance, plans for

approval and consent to the commencement of works for sections or

stages of the project. Prior to or at the time of application for consent to

commencement of works, the AP has to lodge a supervision plan such

that, without further provisions to the contrary, there would need to be

many supervision plans.

7.28 In order to reduce the administrative workload and to make the best use of

supervisory resources, as many types of building works or street works as

practicable may be aggregated and covered by one supervision plan

provided that the plans for the respective building works or street works

have been approved by the Building Authority. In such cases, the

separate TCP roles for each type of building works may be combined

together into the duties of one or more persons.

7.29 The main principle of combining resources is that TCPs carrying out

combined supervision duties have to:

• satisfy the most stringent requirements for experience and

qualifications; and

« meet the individual requirements for the disciplines for all types of

works.

91

7.30 As another aid to simplify the deployment of TCPs, a higher grade TCP

may take up the duties of a junior grade TCP in his stream provided that

the requirements for qualifications and experience of the junior grade are

satisfied.

Procedure for Combining Supervision Resources

7.31 In order to combine the resources required for one or more types of

building works, or to combine the roles of junior TCPs within the duties

of a more senior TCP, the principle explained previously for application

of scale factor may be followed and Table 7.7 may be used to facilitate the

calculations.

7.32 The completed Table 7.7 should be submitted together with the

supervision plan.

7.33 It is necessary first to group the types of works under consideration into

non-concurrent and concurrent works. The remainder of the procedures

are explained in notes accompanying Table 7.7.

7.34 The AP and RSE, after calculating the supervision input in accordance

with Table 7.7, may further combine their two streams in accordance with

the same principles.

Completion ofDSSP

7.35 Having assessed the supervision input, the completed figures should be

entered into the DSSP as follows:

Item 6: AP's Representative and TCPs;

Item 10: RSE's Representative and TCPs;

Item 16: RGBC's Representative and TCPs;

Item 22: the RSC's Representative and TCPs.

92

7.36 The DSSP proforma set out in the Technical Memorandum requires an

acknowledgment over the Author's signature that the site management

structure, together with the specific duties and responsibilities of the TCPs,

specific tasks, method and timing for inspecting, reporting and rectifying

any deviations from the site safety requirements for ensuring the site safety

of works are to be in accordance with the Technical Memorandum.

This aspect is covered under the following items of the DSSP:

AP Item 7

RSE Item 11

RGBC Item 17

RSC Item 23

93

Chart 7.1 FLOW CHART FOR DETERMINATION OF THE SUPERVISIONREQUIREMENTS

Identify type of building works

Identify special features and hazardsassociated with the works

Calculate the Project Attributes Score

and the Scale Factor by filling in the

Pro]ect Attributes Score Sheet

Determine the Degree of Complexity

by referring to Table 6.2 of this Code

Determine the class of supervision by

referring to Table 7.1 of this Code

Determine the minimum supervision

requirements and inspection frequency

level by referring to Table 1 of the

Technical Memorandum

Combine supervision resources

Combination of supervision resources

by filling in Table 7.7 of this Code

Determine the required inspectionfrequency level of the corresponding

TCP by referring to Tables 7.4 and 7.5of this Code

Consider additional supervision

requirements at critical stages by

referring to Table 8.1 of this Code

Deploy suitable grades of TCP andenter their names into the

supervision plan

Adjustment of thesupervision resources bytaking the scale of works

into consideration andby filling in the

Table 7.6 of this Code

94

Table 7.1 Class of Supervision In Relation To Degree of Complexity ForVarious Types of Building Works and Street Works

Types of Works

demolitionfoundationsite formationslope / retaining wall / buried services repairspile wallexcavation and lateral support

cap / footing / basementsuperstructurecurtain wall / claddingaddition and alteration

ground investigation that is regarded asbuilding works

street works

Degree of Complexity

1

C

A

A

2

D

B

A

3

E

C

B

4

F

D

C

5

F

E

D

Table 7.2 Appropriate Disciplines for TCPs (Tl to T3 Only) Relying onAcademic Qualifications

Type of Works


foundation

cap / footing /basement

excavation & lateralsupport works

site formation

slope / retaining wall /buried services repairsaddition & alteration

demolition

superstructure


street works

TCPunder AP

Civil / Structural /Geotechnical Engineering

Building Studies

Building Surveying

Architectural Studies


Building Studies

Building Surveying


TCP underRSE

Civil / Structural /GeotechnicalEngineering

Civil / Structural /GeotechnicalEngineering

TCPunder RGBC/RSC



Building Studies

Building Surveying


95

Table 7.3 Professional disciplines which are generally acceptable* for

qualifying as TCP of grades T4 and T5

Type of Works


foundation

cap / footing / basement

pile wall

excavation & lateralsupport works

site formation

slope / retaining wall /buried services repairs

addition & alteration

demolition

superstructure


street works

TCPtinder AP

RPE (Civil,Geotechnical orStructural)

RPE (Civil orGeotechnical)

RA

RPS(BuildingSurveying)

RPE (Civil,Building orStructural)

TCPunder RSE



RPE (Civil orStructural)

TCPunder

RGBC/RSC


RPE (Civil orGeotechnical)

RPE (Civil,Building orStructural)

* For those works, which in the opinion of the Building Authority, require specialized

engineering input, he may specify such other additional requirements he considers appropriate

for qualifying as TCP.

96

Table 7.4 Table Showing Frequency Levels of Site Inspection in Terms of

Man Days Per Month For Works of Scale Factor = 1

Level

Level 5

Level 4

Level 3

Level 2

Level 1

Description

Full time

Quarter-monthly visits

Half-monthly visits

Monthly visit

As and when required

Notional Supervision Input

(Equivalent Man-days per Month)

25

4

2

1

0.5

Table 7.5 Table Showing Adjusted Supervision Input for Works

Requiring Frequent Visits

Frequency Level of

Site Inspection

5

4.3

4.2

4.1

4

Description

Full time on site

Four visits every week

Three visits every week

Two visits every week

Quarter-monthly visits

(One visit every week)

Notional Supervision Input

(Equivalent Man-days

per Month)

25

16

12

8

4

97

Table 7.6 Adjustment to Supervision Resources

Supervision Plan Ref.

Class of Supervision

TCP

1

2

3

4

5

AP* RSB*

Scale Factor S :

Contractor *

Supervision Resources in Equivalent Man Days

Minimum Frequency. Level

of Site Inspectiond)

Notional SupervisionInput

(Man-days / month)(2 )

AdjustedSupervision Input

(Man-days/month)

( 3 )

Number ofTCP

(4)

Adjusted FrequencyLevel

of Site Inspection(5 )

Notes:

(a) * Delete as appropriate.

(b) The relationship of Notional Supervision Input to Minimum Frequency Level of Site

Inspection is shown in Table 7.4 and 7.5.

(c) The Adjusted Supervision Input is the product of the Scale Factor and the Notional

Supervision Input in terms of Man-days per month.

(d) The Adjusted Frequency Level of Site Inspection cannot be lower than the Frequency

Level directly obtained from Table 1 of the Technical Memorandum.

(e) For a part-time TCP, if the Adjusted Supervision Input is more than the Notional

Supervision Input, then by consulting Table 7.4 and 7.5 and entering the adjusted

number of man-days per month, read off the next highest level of supervision, in all

cases rounding up to the higher level.

(f) For a full-time TCP, if the Adjusted Supervision Input is more than the Notional

Supervision Input, then the number of TCPs of that grade needs to be increased

accordingly, rounding up to the nearest whole number.

(g) If the adjusted supervision input for any post exceeds 25 man-days per month, an extra

TCP is required unless the required supervision input extra over that by one full time

TCP is to be combined with the input from other higher grade TCPs.

(h) This table should not be used for supervision plans or resources which are combined.

98

Table 7.7 Combination of TCPs for one or more types of buildings works or street works under one supervision plan prepared byAP/RSE/RGBC/RSC *

Building Works / Street Works

( 1 )

Types ofBuilding works

orStreet works

( 2 )

Groupingof

works

(3 )

Degreeof

Complexity

( 4 )

Classof

Supervision

( 5 )

ScaleFactor( S )

Supervision Input Before Combination

( 6 )

TCPGrade

( 7 )

FrequencyLevel of Site

Inspection

(8)

Notional SupervisionInput

(man-day/month)

(9 )

Adjusted supervisioninput

(5) x (8)(man-day/month)

Combined Supervision Input

( 1 0 )

TCP gradesunder

combination

( i i )TCP post with

combinedduties

( 1 2 )

Summation ofsupervision input

under thecombined TCP

(13 )

No. ofcombined

TCP

(14)

RequiredFrequency

Level of SiteSupervision

Note: 1. * Delete as appropriate.2. All types of building works or street works covered by the supervision will be listed under column (1). They will be grouped in

such a way that any portion of works under one group will not be carried out concurrently with any works under other groups.3. Other notes follow on the next page.

99

Explanatory notes for filling In Table 7.7

1. The first step is to list those types of building works or street works of which supervision

resources are to be combined.

2. Types of works should then be grouped together into concurrent and non-concurrent

works.

3. The Degree of Complexity and Scale Factor for each type of works refers to the Project

Attributes Score obtained from the Project Attributes Score Sheet which is attached to this

Code of Practice.

4. The Class of Supervision refers to Table 7.1 which shows the relationship between Class

of Supervision and Degree of Complexity for various types of building works or street

works.

5. TCP grade and the Frequency Level of Site Inspection required for the required Class of

Supervision can be referred to Table 1 of the Technical Memorandum.

6. Notional Supervision Input corresponding to the Frequency Level of Site Inspection can

be found from Table 7 A.

I. The Adjusted Supervision Input is the product of the Scale Factor and the Notional

Supervision Input.

8. TCP grades that are to be combined are listed in Column 10.

9. Grades of TCP whose duties are to be combined are listed in Column 11.

10. The Supervision Input required for those TCPs who are to be combined is summed up as

the supervision input required for the combined TCP.

I1. The number of combined TCP and Frequency Level of Site Inspection required after the

combination of TCPs can be derived using tables 7.4 and 7.5 using the same technique as

used in Table 7.6.

100

8 Additional Safety Supervision Requirements

8.1 This section explains how the practitioner should deal with features which give rise to a

need for special care in preparing a supervision plan or in carrying out site safety

supervision. These are:

® critical stages of the works;

• method statements;

• precautionary and protective measures; and

• geotechnical aspects of works.

Critical Stages of the Works

8.2 Only the minimum safety supervision requirement is specified in each class of

supervision. Extra supervision resources are required for critical stages of the works.

8.3 Item (3) of the DSSP deals with an appraisal of special hazards which includes critical

stages. In item 3 (iii) of the DSSP, the AP is required to declare that the critical stages

of the works have been taken into account in the preparation of the DSSP and a list of

critical stages will be included along with an appraisal of special hazards within

Appendix 1.2 of the DSSP.

8.4 The contractor's AS should notify the AP and RSE no less than 14 days before

commencing the critical stages of the works, setting out the commencement date and

estimated time for completion of critical stages.

8.5 Additional safety supervision resources are to be allocated to critical stages of the works

based on the following principles:

(a) during critical stages of the works, increased frequency of inspections are to be

carried out;

101

8.7

(b) the extra inspections should incorporate:

(i) a record of the state of completion of the critical stage;

(ii) progress made since the previous inspection;

(iii) a record of any aspects which give rise to concern or potential concern

for safety of the works or the workers on site, or all persons around the

site or adjoining buildings, structures and land; and

(iv) a record of recommendations made and of any actions taken in

respect of (iii).

8.6 The critical stages of the works together with the additional supervision requirements

are set out in Table 8.1. This table may be reviewed from time to time and amended by

the Building Authority taking into account current good practice. In addition, the AP,

RSE or Contractor, may determine that a particular section of the works is particularly

difficult or risk prone or that the consequences of a non-conformity might be serious. In

these cases any party may notify his counterparts that he considers the section of works

to be a critical activity and include it in the DSSP.

During the period in which a TCP is carrying out supervision of critical stages, he is

required also to carry out supervision of other work as appropriate to his grade. In this

case his deployment is deemed to satisfy also the requirements of Table 1 of the

Technical Memorandum in respect of his grade.

Method Statements

8.8 The RGBC and the RSC are required to deal with method statements in Part 3 and

Part 4 respectively of the DSSP.

102

8.9 In preparing a method statement, the working procedures and sequences which are

necessary in order to. achieve the required completed form of the works need to be set

down and any hazards associated with these procedures or sequences of working

identified, together with any additional special features or hazards associated with the

site location.

8.10 There are two types of method statements which require separate action:

(a) method statements which are provided on prescribed plans or on plans that are

not prescribed plans but have to be submitted by the AP/RSE to the Building

Authority for agreement; and

(b) method statements which are provided by the Contractor to deal with a

particular aspect of the works that need not be submitted to the Building

Authority.

8.11 For case (a), the Contractor is not required to submit any further method statement

along with the supervision plan as the plans showing the method statements should

have been submitted previously to the Building Authority. For case (b), the

Contractor has to submit his method statement together with the supervision plan.

Precautionary and Protective Measures

8.12 In completing their relevant parts of the DSSP, the RGBC and the RSC are required to

submit details of precautionary and protective measures which need to be taken to

ensure site safety.

8.13 Precautionary and protective measures associated with building works and street

works are listed in Table 8.2.

103

Geotechnical Aspects of Works

.14 Supervision required for geotechnical aspect of the works may be imposed by the

Building Authority under section 17 (1) of the Buildings Ordinance. Supervision

imposed under this section of the Ordinance is of two types, part-time supervision and

full time supervision. TCPs who are deployed for site safety supervision can also

undertake the duties of the personnel undertaking supervision on geotechnical aspects

of the work or vice versa as long as their qualifications and experience are acceptable

to the Building Authority for carrying out supervision of the geotechnical aspects of

the works and providing they fulfill their obligations as required by the Technical


104

Table 8.1 Additional Supervision Requirements for Critical Stages for Building Works

Type of BuildingWorks

Demolition;Addition andAlterationworks

Foundation

Excavation andlateral support;Site formation;Slope/retainingwall/buriedservices repairs

Superstructure

Dl

D2

D3F4

F5

El

E2

E3

E4

E5

SI

S2

Critical Stages of Works

Demolition of cantilever structure over street

Demolition of hanger structure

Demolition of prestressed concrete memberPiling near the crest of retaining wall within azone contained by a 45° line from the toe ofwall

Piling works within 5m of MTR structure,highway/railway structure or buildingcompleted more than 40 yearsPresence of a watermain with diameterexceeding 200mm, gas main, building onshallow footing or MTR structure within azone contained by a line measured at 60° tothe horizontal from the base of excavation

Construction of diaphragm wall/bored pilewall or installation of sheet pile/pipepile/soldier wall within 5m of MTR structure,highway / railway structure, watermain largerthan 200mm diameter / gas main larger than200mm diameter or building founded onshallow footings

Preloading of struts

Operation of recharging well

All related work when monitoring indicatesmovement of ground or building orgroundwater drawdown exceeding thatallowableConstruction of cantilever structure over street

Construction of elevated structure, likepodium deck, over street

Inspection FrequencyContractor's

T3

Full Time

Full Time

Full TimeFull Time

Full Time

Full Time

Full Time

Full Time

Full Time

Full Time

Full Time

Full Time

RSE's Stream

T43idaily

Daily

DailyBidaily

Bidaily

Bidaily

Bidaily

Bidaily

Daily

Bidaily

Daily

Daily

T2Full Time

N/A

N/AN/A

N/A

N/A

N/A

Full Time

N/A

Full Time

N/A

N/A

Notes:

1. One TCP of the appropriate grade as shown in the above table is required to supervise the critical stagesofworks.

2. For inspection frequency at Daily intervals the TCP is required to carry out site inspection at least onceevery working day.

3 . For inspection frequency at Bidaily intervals; the TCP is required to carry out site inspection at least onceevery other working day.

4. N/A means not applicable.

105

Table 8.2 Precautionary and protective measures for various types ofbuilding works and street works

Type of Building Works Typical PrecautionaryMeasures

Typical ProtectiveMeasures

Demolition;Addition and alterationworks

© Propping of floorsbeneath demolitionarea

• Tie-back• Identifying and

locating services• Warning notices• Prohibition of

working in drop zones

• Catch Fans• Hoardings• Netting

Ground investigationfoundation;Caps/footing/basement

Support to excavationProtection/support toadjoining buildingsMonitoringIndicate position of allservices includingoverhead lines withinthe works

• Fence around drillingrigs, excavations andbored pile openings

• Hoardings

Excavation and lateralsupport;Site formation;Slope/retainingwall/buried servicesrepairs

Pre-loading of strutsVertical supports topropsWelded connectionsMonitoringAdequate drainagearound excavationcrestPrecautionary worksagainst heavy rainfallBlast control

• Sealing of existingcracks

• Hoardings• Fencing

106

Table 8.2 Typical precautionary and protective measures for varioustypes of building works and street works (Cont'd)

Type of Building Works Typical PrecautionaryMeasures

Typical ProtectiveMeasures

Superstructure;Curtain wall/cladding

Fence openingsProp floors belowworking floors afterstripping of formworkRestraint to partywallsAdequate propping ofcolumns and wallsafter stripping offormworkTemporary proppingof precast elementsDefined lifting zonesTemporary supports,props or restraint tocladdingProperly designed andsecured rubbish chutes

• Catch fans• Hoardings© Netting (horizontal

and vertical)

Street works Identify and indicatepositions of servicesAdequate propping toexcavationAdequate proppingand restraint to signsand street furnitureAdequate temporarydrainageDefined loading andunloading zones

Concrete trafficbarriersAdequate temporaryfencing and trafficcontrol

107

9 Communication and Reports

Contents

9.1 This section deals with the principles of and procedures for

communication. The procedures for dealing with non-conformity are

illustrated in Chart 9.1.

Interstream Communication

9.2 The requirements for interstream communications are described in the

Technical Memorandum. Interstream communications are afforded the

same priority as within-stream communications in order to facilitate

effective safety supervision.

9.3 It is presumed that TCPs will take all reasonable and practical steps to

inform their counterparts of any aspect of the works which gives rise to

concern or which could give rise to concern on grounds of safety.

Site Safety Supervision Reports

9.4 As set out in the Technical Memorandum, site safety supervision reports

have to be completed by all TCPs whenever they carry out site safety

supervision activities. Subsequently these reports are filed and maintained

at the site office.

Non-conformity Reports

9.5 If a non-conformity arises and comes to the attention of a TCP, the

following procedures will be initiated :

(i) TCP informs the Representative of his functional stream.

(ii) The Representative informs the Representatives of other functional

streams,

(iii) The Contractor's Representative should promptly arrange the

necessary rectification works.

108

(iv) Upon the completion of the rectification works, the Contractor's

Representative will inform the AP's and RSE's Representatives.

(v) If the non-conformity is of a structural nature, the RSE's

Representative will check and satisfy that the rectification works

have been properly completed. For other cases, the AP's

Representative will check and satisfy that the rectification works

have been completed properly.

(vi) If the Contractor's Representative does not initiate the rectification

works or does not carry out the rectification works properly, the

AP's or RSE's Representative, as the case may be, will issue

instruction for proper rectification works.

(vii) If the non-conformity is considered to pose an imminent danger, the

AP's or RSE's Representatives, apart from following the above

procedures will report immediately to the AP or RSE as the case

may be. The AP or RSE upon receiving the report will issue

rectification instruction to the AS and inform the RSE or AP as the

case may be. The AP will also report the case to the Building

Authority.

(viii) If the non-conformity is considered to cause a material concern for

safety and the Contractor does not comply with instructions, the

AP's or RSE's Representative will report to the AP or RSE as the

case may be. The AP or RSE will instruct the AS to initiate action

immediately and inform the RSE or AP as the case may be. If the

Contractor still fails to comply promptly with the rectification

instruction, the AP will coordinate further action and report the case

to the Building Authority.

(ix) When the non-conformity has been rectified, the Contractor's

Representative will report to the AP's and RSE's Representatives

who will report to the AP and RSE accordingly. If the report on

non-conformity has previously been submitted to the Building

Authority, the AP will also report to the Building Authority upon

the completion of the rectification works.

109

Chart 9.1 FLOW CHART FOR DEALING WITH NON-CONFORMITY

Non-conformity event

TCP informsRepresentative

of his functional stream

Representative informsother Representatives

Contractor'sRepresentative should arrange

rectification works

Is non-conformityof structural nature?

NO

YES

RSE's Representative willcheck and satisfy adequacyof rectification works and if

necessary instruct rectification

AP's Representative willcheck and satisfy

adequacy of rectificationworks and if necessary

instruct verification

Is non-conformityconsidered to cause material concern

for safety and Contractor failsto comply with rectification

instruction?

Is non-conformityconsidered to poseimminent danger?

Contractor's Representativereports to AP and RSERepresentatives whennon-conformity has

been rectified

APs or RSE's Representativereports to AP or RSE

who will instruct AS totake action and AP will

report to Building Authority

AP's or RSE's Representativereports to AP or RSE

who will instruct AS totake action

AS acts on report ofnon-conformity andrectification process

begins forthwith

AS reports to AP andRSE when non-conformity

has been rectified

AS acts on report ofnon-conformity andrectification process

begins forthwith

AP reports toBuilding Authority

AP reportsto Building Authority

AS reports to AP andRSE when non-conformity

has been rectified

no

/ 0 Minor Deviations from a Supervision Plan

Contents

1.0.1 This section explains how to deal with minor deviations from a

supervision plan.

Absence of TCP due to personal circumstances

10.2 As provided in Section 9.1 of the Technical Memorandum, there will be

occasions when TCPs are absent because of:

® accident;

• illness; and

• emergency

10.3 A substitute TCP of equal or better qualifications and experience is

required to be posted to site within 48 hours and relevant details such as

the substitute's name, identity card number and contact telephone number

are to be entered into the site register.

Unexplained absence or other absence outside the provisions of the

Technical Memorandum or Code of Practice

10.4 Unexplained absences or absences outside the provisions of the Technical

Memorandum or Code of Practice will be addressed by the

Repres'entative(s) of the stream(s) concerned who will enter into the site

register:

(a) the period of absence;

(b) the reasons for the absence; and

(c) the action which has been taken.

111

Other Non-conformity in Supervision Arrangements

10.5 If a non-confomiity arises in supervision arrangements other than the

absence of a TCP and not being a non-conformity in the execution of the

work, method statements, precautionary or protective works, the

following procedure will be initiated:

(i) TCPs when learning of the non-conformity will report to their

respective Representative;

(ii) the respective Representative will request that the supervision

arrangements be rectified;

(iii) in case of non-compliance, the Representative will report to the AP,

RSE or AS, as the case may be; and

(iv) the AP, RSE or AS, as the case may be, will further request that the

supervision arrangements be properly complied with and if action is

not taken he will report accordingly to Building Authority.

112

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