venue: barcelona hotels, wuse, abuja -...
TRANSCRIPT
The Nigerian Institute of Quantity Surveyors
A Guide to the 4th Edition of the NIQS Building and
Engineering Standard Method of Measurement.
By
Dr. GANIYU AMUDA YUSUF (FNIQS, RQS)
Department of Quantity Surveying
Faculty of Environmental Sciences, University of Ilorin, Ilorin, Kwara State
2- Day National Workshop on the Relevance of BESMM4 in
Total Cost Management of Construction works
Date: 6th – 7th April, 2016
Venue: Barcelona Hotels, Wuse, Abuja
OVERVIEW OF BESMM4
The preparation of the NIQS BESMM4 was achieved as follows:
Initiated by the NIQS 2011 – 2013 NEC.
Completed through NIQS Ad-hoc committee for the review of
BESMM3 and launched in November 2015 by NEC 2013-2015.
Bulk publication and training by NEC 2015-2017.
Declaration of effective date for use by 2015-2017 NEC (January,
2016) if not changed.
The document intended to replace BESMM3
The Document contains:
The preface highlight the approach adopted in the development of previous SMMs &
parties involved.
The general rules give direction about the information provided in the document and are
applicable to every section of the documents;
The classification of work items covered the following information:
items of work to be measured;
measurement rules;
definition rules;
coverage rules and;
supplementary information
Descriptions are derived from general rules and classification tables.
OVERVIEW OF BESMM4
STRUCTURE OF BESMM4
BESMM4
Part 1: General Rules Pg 1-9
Part 2: Rules for detailed measurement of building works
Pg. 10-25
Part 3: Tabulated rules of
measurement for building and
engineering works
Pg. 26 - 489
Section1:Measurement of
Building Works Pg. 32-307
Section 2: Measurement of Civil/Industrial Engineering
works and the Likes Pg. 308 -489
Appendices Pg. 490 -503
The document is divided into 3 main sections with supporting appendices
Part1: General rules (pg. 1-9)
“Bills of quantities shall fully describe and accurately represent the
quantity and quality of the work to be carried out. More detailed
information than is required by the rules shall be given where
necessary in order to define the precise nature and extent of the
work required” Clause 1.1. pg.1
STRUCTURE OF BESMM4
Part 2: Rules for detailed measurement of building works (pg 10-25)
This section outlines
– the purpose and benefits of Bills of Quantities, – explains types of bills of quantities and preparation of bills of
quantities, – describes responsibility for quantifying building works under
various procurement option, – outlines works under preliminaries, – defines the information required to enable preparation of bill of
quantities and, – describes the key constituents of bill of quantities and explained
how to prepare bill of quantities
STRUCTURE OF BESMM4
Part 3: Tabulated rules of measurement for building and engineering works – (Pg.32 -489)
It comprises the majority of the BESMM4 being the tabulated rules
for the measurement and description of building and engineering
works for the purpose of works procurement
STRUCTURE OF BESMM4
Appendices: Pg 26-489
Appendix A: Guidance on the preparation of bill of quantities (pg.491-495)
Appendix B: Template for preliminaries pricing schedule (condensed) (pg.496)
Appendix C: Template for preliminaries pricing schedule (expanded) (pg.497-499)
• Appendix D: Template for pricing summary for elemental bill of quantities (condensed) (pg.500)
Appendix E: Template for pricing summary for elemental bill of
quantities (expanded) (pg.501-502)
Appendix F: Templates for provisional sums, risks and credits (pg.503)
STRUCTURE OF BESMM4
PRIMARY FUNCTIONS/USES OF BESMM4
Assist in standardising the method of categorising construction works into
component parts
Clearly indicating the different circumstances under which items of
construction works will be executed
Categorising and defining the items of temporary works
Indicating different circumstances under which items of work are executed
so as to distinguish between degrees of difficulty, risks or site conditions.
Indicating different circumstances that significantly affect
construction/installation costs cost
Clearly defining the limits of the items to avoid misinterpretations of what
is included deemed to be included or excluded.
Prescribing the method and procedure for determining dimensions, and
calculating the quantities of measured items.
Lay good basis for automated applications in terms of software and
systems development thereby allowing users to price tender documents
more efficiently.
Lay good foundation for effective collaboration by quantity surveyors and
other project team which is a major requirement for Building Information
Modelling (BIM) adoption.
PRIMARY FUNCTIONS/USES OF BESMM4
The drivers for BESMM4 development as identified here are:
Reference documents (SMM7 &CESMM3) now outdated
Emergence of new method of construction and the need for provision of precise cost
information by QS.
The desire to make risk management an integral part of early cost estimates for construction
works, as such the generic contingency allowance on construction projects is now outdated
The growing awareness in the use of information and computer technology (ICT) in
the industry, translate to increasing availability of electronic documents. In addition,
the development of automated quantity extraction and estimating systems in five-
dimensional (5D) building information modelling (BIM) systems means that adoption
of the rules of measurement in BESMM3 may be difficult.
DRIVERS FOR BESMM4
COMPARISION OF BESMM3 WITH BESMM4- CONTENT
BESMM3
General Rules
1A Preliminaries/General conditions
C Existing site/buildings/services
D Groundwork
E In situ concrete/large precast concrete
F Masonry
G Structural carcassing metal/timber
H Cladding/covering
J Waterproofing
K Linings/Sheathing/Dry partitioning
L Windows/doors/stairs
M Surface finishes
N Furniture/Equipment Additional Rules – work to
existing buildings
BESMM4
General Rules
1.1 Preliminaries
1.2 Off-site manufactured materials, components and
buildings
1.3 Demolitions
1.4 Alterations, repairs and conservation
1.5 Excavating and filling
1.6 Ground remediation and soil stabilisation
1.7 Piling
1.8 Underpinning
1.9 Diaphragm walls and embedded retaining walls
1.10 Crib walls, gabions and reinforced earth
1.11 In-situ concrete works
1.12 Precast/composite concrete
1.13 Precast concrete
BESMM3
N Furniture/Equipment
P Building fabric sundries
Q Paving/Planting/Fencing/Site
furniture
R Disposal systems
X Transport systems
Y Mechanical and Electrical services
measurement
Additional Rules – work to existing
buildings
Appendices
Alphabetical Index
BESMM4
1.14 Masonry
1.15 Structural metalwork
1.16 Carpentry
1.17 Sheet roof coverings
1.18 Tile and slate roof and wall coverings
1.19 Waterproofing
1.20 Proprietary linings and partitions
1.21 Cladding and covering
1.22 General joinery
1.23 Windows, screens and lights
1.24 Doors, shutters and hatches
1.25 Stairs, walkways and balustrades
COMPARISION OF BESMM3 WITH BESMM4- CONTENT
BESMM3 BESMM4
1.26 Metalwork 1.27 Glazing 1.28 Floor, wall, ceiling and roof finishing 1.29 Decoration 1.30 Suspended ceilings 1.31 Insulation, fire stopping and fire protection 1.32 Furniture, fittings and equipment 1.33 Drainage above ground 1.34 Drainage below ground 1.35 Site works 1.36 Fencing 1.37 Soft landscaping 1.38 Mechanical services 1.39 Electrical services 1.40 Transportation Appendices
COMPARISION OF BESMM3 WITH BESMM4-
CONTENT
Ref: BESMM3 Ref: BESMM4
1A Preliminaries/Gener
al conditions 1.1
Similar provision, expanded and greater detail
added to give clear direction.
1.1 Main Contract Preliminaries
Part A Information and requirements (pg. 33 –
62)
Part B Pricing Schedule (pg 63 – 96)
B Building Works 1.2 Offsite manufactured materials, components or
buildings (Pg. 97-99)
There were no details provided in BESMM4,
now rules included for prefabricated structures,
units (e.g. roof & external walls) in proprietary
packages.
COMPARISION OF PART 3 RULES- BUILDING
WORKS
C
Existing
Site/buildings/service
s (pg. 24 -29)
1.3 Demolitions (pg.100 – 104)
Rules remain very similar; however recycling provisions have been
added.
1.4 Alterations, repairs and conservation (pg. 105-115)
Rules covering conservation have been increased and
decontamination has been expanded.
D Groundwork 1.5 Excavation and filling (Pg.116-128)
Generally no change in principles
D20.1 Site Prep 1.5.1 Increased detail on preliminary work items if used e.g. locating
underground services, trial pits and boreholes etc. (pg 118)
Removing trees 1.5.2 Removing trees - the band widths have been varied. Girth 500-
1500mm; 1 500- 3000mm and girth over 3,000mm. (pg 118)
COMPARISION OF PART 3 RULES- BUILDING
WORKS
D20.2 Excavating 1.5.6
Rules now simplified into either bulk excavation or foundation
excavation with depth ranges now only in 2 m stages. (i.e. dp n.ex
2m; over 2m n.ex 4m and thereafter in 2m stages) (pg.121)
1.5.8
Earthwork support has been simplified in that it is now only
measured where specifically called for in the contract documents
(specification) Pg. 124
There is no requirement to measure working space or compacting
of surfaces.
1.5.11 Filling is now either less than 500mm (m2)or final thickness stated
where over 500mm thick (m3) (pg. 126)
1.5.13-
19 Broken line should divide unit of measurement (m/m2) Pg.128
1.5.20 Cutting off the tops of piles has been included here instead of in
the piling section. (Pg. 129)
COMPARISION OF PART 3 RULES- BUILDING
WORKS
1.6 Ground remediation and soil stabilisation
This is a new section added to BESMM4 (pg. 130 -133)
D30 1.7
Piling - no real change although simplified by removing
separation of different types of piles and cutting off tops
has been moved to excavation. Pg 134--138
D50 1.8 Underpinning - Greatly simplified. Preliminary trenches
and excavation measure no longer required. Pg. 139-140
D40
Embedded
Retaining
Wall. PG 39
1.9
Diaphragm walls - simplified, no excavation measured
here (deemed included), detail description stating
thickness of wall. Pg.141-142
COMPARISION OF PART 3 RULES- BUILDING
WORKS
D41
Crib
Walls/Gabions/
Reinforced Earth
Crib Walls/Gabions/ Reinforced
Earth
Filling to gabion basket removed
but to be measured under section
1.5, and extra for ends, corner now
added. Pg 143-145
COMPARISION OF PART 3 RULES- BUILDING
WORKS
E
In-situ
concrete/large
precast
1.11 In-situ concrete works pg 146- 158
Separated out precast from in-situ concrete and
radical change in the way concrete is measured
New sections are:
1.11.1 Mass concrete - m3 any thickness pg 147
1.11.2 Horizontal work - m3 > or < 300mm thick pg 148-
1.11.3-4 sloping - m3 > or < 300mm thick pg 149
1.11.5 vertical - m3 > or < 300mm thick pg 149
Sundry - m2 or m3 > or < 300mm thick e.g.
machine or plant bases and the like pg 150
Sprayed -m2 thickness stated pg. 150
Surface finishes to insitu concrete m2 pg 150
COMPARISION OF PART 3 RULES- BUILDING
WORKS
E20 Formwork 1.11.13 Formwork - some minor changes. If less than 500mm
wide then measured by metre run. Pg. 151-154
Mortices and holes have been removed from this section
E30 Reinforcement 11.33 Reinforcement - minor changes pg 155- 158
1.33,34
&36
Spacers and chairs are deemed included. Pre tensioned
members have now been added. pg155
E40 Designed joints 1.11.38 Remains the same pg 156
E41 Worked finishes
and cutting has been removed as a separate section
COMPARISION OF PART 3 RULES- BUILDING
WORKS
E42 Accessories 11.41 Accessories - no real change pg. 155
Grouting 1.11.42
Grouting and filling- new section added,
measurement now chases is by metre and grouting
stanchion bases, grillages or filling holes by number
pg158
E50/ E60
Precast concrete
frames /precast
composite concrete
decking
1.12 Precast/ Composite concrete pg 159 -160
Now a section for composite precast units,
measured m2 for walls and floors
1.13 Precast Concrete pg 161-163
Very similar however formwork and reinforcement
is deemed included
COMPARISION OF PART 3 RULES- BUILDING
WORKS
F Masonry 1.14 Masonry pg 164 -172 The natural and artificial stone rules under F20, E21, and E22
are now all put under one section. All walls measured along
centreline and assumed vertical unless stated.
Separate face work (e.g quoins, sills, copping, steps in pg 57-58
BESMM3) items have now been removed
G
Structural/
Carcassing
Metal/Timber
1.15 Structural metalwork pg 173-179
Major changes - weight classification now
Less than 25Kg/m, 25 - 50 kgs/m, 50 - 100 kgs/m and so on in
increment of 50kg/m . Short lengths now also included pg.173
1.15.8 Permanent formwork changed to profiled metal decking pg.176
COMPARISION OF PART 3 RULES- BUILDING
WORKS
G20 Carpentry/Timber
framing/First fix 1.16 Carpentry pg. 180183
Separated primary structural members (wall plates)
from engineered or prefabricated members (roof
trusses) pg 181 - 182
1.16.1
All boarding, flooring and sheeting is now
measured here, either < 600 or > 600mm wide pg
183
G30 Metal profiled sheet
decking 1.17 Sheet roof coverings pg184-189
Now covers, bituminous felt, plastic sheets, sheet
metals and rigid boards.
Some major changes in items deemed included in
boundary work pg 186-187
G31 Prefabricated timber
decking Removed
COMPARISION OF PART 3 RULES- BUILDING
WORKS
H Cladding and covering This has been split into numerous sections
H10/12 /13
Patent glazing, structural
glass
(In BESMM3 sections
K11-21 are included
together under H20)
H10, 12, 13 Patent glazing/plastics/
structural glass. 1. 21.1-7
Claddind and Covering Pg. 205-08
The range of claddings have all been included under
section 21 pg.206
H11 Curtain Walling Basic measurement principles remain the same.
H20, 21,
92, K11,
12, 13, 14
and 15,
H30,31,32,
33,41,43
Sheet claddings and
profiled sheet claddings
and other claddings
The categories have been reduced and captured under this
section. However widths lower than 600mm wide now
need to be measured linearly. See pg.206
COMPARISION OF PART 3 RULES- BUILDING
WORKS
H10.4
and 5 Raking curved cutting 21.9
Boundary work - includes all cutting and trims to
form the edge/intersection.
H20.1.1 Rigid sheet cladding 1.21.1 The narrow widths and isolated areas for other
claddings are now no longer required to be measured.
H14 Concrete roof lights 1.13.2.3.4
Precast concrete roof lights are now measured with
other precast concrete works. There is no change to
measurement rules.
K20/21 Timber board flooring 1.16.4 Carpentry
Boarding is measured in metres if not exceeding
600mm wide and in m2 where over 600mm wide.
H51, 52 Natural Stone cladding
/cast stone cladding 1.14.1
Masonry, Natural stone walling and dressings /cast
stone walling and dressings pg. 165
Only measured in m2 except for isolated features such
as piers/columns or arches etc. pg 166
Perimeters and abutments are now measured as extra
over and more work is deemed included. Pg 168
COMPARISION OF PART 3 RULES- BUILDING
WORKS
H51.5 Floors
This is not in the walling section and
should now be referred to the finishes
section 1.28.2
H51.6-10 Staircase works Refer to new section 1.25.1 where
staircases are now numbered.
H60 Plain roof tiling 1.18 Tile and slate roof and wall coverings
pg.190
Basic principles have not changed
H70 -
H76
Metal sheet coverings
etc 1.17 Sheet Roof Coverings pg 184
1.17.1
Now introduced width classification<
500mm wide - measured lineally and >
500mm wide measured m2. Pg. 185
COMPARISION OF PART 3 RULES- BUILDING
WORKS
J Waterproofing 1.19 Waterproofing pg.194
J40
There is no separation of the item for tanking from
coverings. Discretion is given to those drafting the
description to include sufficient information to enable
pricing.
J20.5 Skirting 19.3
The width classifications have been reduced to now
only, 500mm wide or >500mm wide. Skirting are no
longer in band widths but each measured in m stating
the net girth on face. pg. 195
J20.12 Internal angle fillets Not measurable - deemed included
J41, 42, 43 Built up felt roofing 1.17 Sheet roof coverings
Principles are similar except width classification now
<500mm wide and > 500mm wide pg. 185
Girths at abutments are no longer applicable
COMPARISION OF PART 3 RULES- BUILDING
WORKS
K Linings, sheathing dry
partitioning 20 Proprietary linings and partitions
K10.1.1
Proprietary partitions
measured in 300mm
stages, measured in
metres
1.20.1.2
Metal framed systems measured in m2 in
1m height stages, total length stated. Pg.
199
K32 Panel cubicles 1.22
General Joinery.
Cubicle partitions - no change to
measurement PG 210
K40 Demountable
suspended ceilings 1.30.1
Suspended Ceiling
General principles remain the same. Fire
barriers have now been introduced. Pg.246
COMPARISION OF PART 3 RULES- BUILDING
WORKS
K41 Raised Access floors 1.28.3
Measurement principles remain the same. Fire
barriers within the void need now to be measured. Pg
235
L Windows, doors and stairs
L10 Windows 1.23 Windows in section 23, Doors in section 24
Bedding and pointing frames is no longer measured.
1.23.8
Glazing supplied with windows and doors is now
separated and no longer measured in m2; panes are
numbered with size given.
L20 Doors 1.24 Doors
Measurement principles have not changed.
Bedding and pointing frames is no longer measured.
P21 Ironmongery 1.24.16
Ironmongery.
Measurement principles have not changed pg
222
COMPARISION OF PART 3 RULES- BUILDING
WORKS
L30 /
Q41
Stairs and
balustrades 1.25 Staircases
No change to measurement principles,
except the extra over items for ramps,
wreaths etc. which are now deemed
included pg 224-225.
L40
L41
General Glazing
Lead light glazing 1.27 Glazing pg 229-231
L40.1.1
1
Measured glass in
m2. 1.27.1.1.1
Glass now needs to have the panes
numbered with the size stated.
The category of special glass has been
removed but the type of glass needs to be
stated.
COMPARISION OF PART 3 RULES- BUILDING
WORKS
L40.7-10
Engraving etching etc was
measured in m2 or design
work numbered
1.27.4 All additional features are now measured extra
over and are numbered.pg.230
L40.13
Hacking out existing glass
was measured in metres
of the rebate length.
1.27.8 Removal of glass has changed to be measured by
nr. Stating the size of panes. Pg. 231
L42 Infill panels 1.22.18 No change pg.215
M Surface finishes 1.28 Floor, wall, ceiling and roof finishes pg 232-241
M10,
12,13,20,
23 and
J10
Applied in situ finishes 1.28.1 The width category has changed from <300mm
to <600mm pg.234
M10.16 Rounded angles and
intersections These are now deemed included. Pg 235
COMPARISION OF PART 3 RULES- BUILDING
WORKS
M10.24 Accessories 1.28.25-35
The measurements principles remain the same
however reinforcement quilts are separated out from
accessories. All accessories are now numbered. Pg.
240-241
There is the opportunity to measure reinforcement
either in m2 or by the m. No width categories are
provided. Pg.240
M21 Insulation with rendered
finish 1.28.32
Insulation is measured separately from any rendered
finish. Pg 240
M22 Sprayed coatings No specific rules separating this are included.
M30 Metal mesh lathing 28.30, 31 No specific section for this, it is measured either as m or
m2, depending on measurers choice.pg 240
M31 Fibrous plaster No separate rules for this.
M40/42/41
/50/51
Tiling, parquet flooring,
carpeting 1.28
No separation from in situ finishes. Width category is
now general at <600 or >600. Pg. 235-236.
COMPARISION OF PART 3 RULES- BUILDING
WORKS
M52 Decorative papers 1.29.9
The areas that are measured have changed to
being<1.00m2 or >1.00m2. Corners are now
deemed included.
M60 Painting and decorating 1.29 Decoration
General principles remain the same. The isolated
surfaces have increased form -.5m2 to 1.00 m2
pg.244.
1.29.1.2.1
.1
Work to ceilings over 3.5 ne 5m sand thereafter
in 3m stages and not 1.5m pg 243
M60.10 Coloured bands 1.38.16.6 These have been moved to the services section.
Pg293
M61 Intumescent paint fire
protection 1.31.5 Now measured only in m2. Pg 249
N Furniture and equipment 1.32 Furniture, fittings and equipment
COMPARISION OF PART 3 RULES- BUILDING
WORKS
Principles have not changed however the marking of
positions, commissioning and connecting is deemed
included as opposed to being measured in
accordance with BESMM3 PG 252
P Building Fabric Sundries
P10 Insulation, proofing and fire
protection 1.31
Insulation, fire stopping and fire protection. Pg.249-
250
1.31.1
Added ability to measure by m as well as m2 but no
width categories given. Pg.249-250
Now includes for fire stops by the metre and fire
sleeves, numbered.pg 250
P11 Cavity insulation 1.31.6 No change pg 250
P20 Unframed items 1.22 General joinery
General principles of measurement unchanged,
however all ends, angles etc are deemed included. Pg
209
COMPARISION OF PART 3 RULES- BUILDING
WORKS
P20.8 Extra over hardwood All the items are now deemed included. Pg 209
P21 Ironmongery 1.22 General joinery
This was ironmongery
not supplied with
windows or doors.
22.22 Now measured under section 22, principles not changed. Pg.
216
P22 Sealant joints 22.19/20/
21
Rules remain the same; however there is now a separate item
for raking out existing joints. Pg 215
P30 Trenches/pipe ways /Pits
for buried services 1.41.13
The external services have been separated from the internal
ones part of the missing page. The pages are missing in this
document
P30.1 Excavating trenches 1.41.13 Service runs are now measured in 500mm depth stages instead
of 250mm. part of the missing page. Missing
There is no need to measure the bed and surround separately it
is now included in the description of the service run. Missing
P30.9 Other chambers 1.41.17 -
22
The detailed measurement of the component parts of chambers
has been removed and these are now all numbered stating the
depth and giving a detailed description Missing
COMPARISION OF PART 3 RULES- BUILDING
WORKS
1.41.27
A specific item has now been included for testing
and commissioning of external services with
provision for attendance and additional equipment.
The pages are missing in this document
P31
Holes/chases/covers
/supports for
services
1.41
BWIC with M,E and transportation The pages are
missing in this document
P31.19 Cutting or forming
holes 1.41.1
For electrical work there is a removal of need to
measure cutting and chasing by points. This is now
one item per installation type.
For other installations there is no need to measure
holes by their Number - they are deemed included
under the general builders work item for the
services. The pages are missing in this document
COMPARISION OF PART 3 RULES- BUILDING
WORKS
P31.24 and
25 Ends of Supports 1.41.6
These have been simplified and the types of supports have
been broadened to include Pylons, poles, wall brackets, soffit
hangers, stays and proprietary supports
P31.32 Work to existing
structures 1.41.8 & 9
There is still a need to cut holes, chases and matrices in
existing structures and lifting floor boards and chequer plates.
The pages are missing in this document
Q Paving and Fencing 1.35 Site Works Pg. 267 -275
Q10 Kerbs and edgings 1.35.1 No major change, accessories are now measured as extra over
and are only numbered. PG.268
Q21 Insitu paving 1.35.6 No real change – measured in accordance with new section
11.
Q22
Q23
Coated macadam
Gravel etc
1.35.12,
35.13
Addition of band widths, now <300 wide or >300. pg 269 & pg
270
Q24, Q25 Blok and slab paving 1.35.14 Addition of band widths, now <300 wide or >300 pg 271
COMPARISION OF PART 3 RULES- BUILDING
WORKS
Q26 Special surfacings 1.35.18-24 No change however the description for line
marking has been broadened. Pg 273 & 274
Q30
Q31
Seeding and turfing,
Planting 1.37 Soft landscaping - No change pg.279
Q40 Fencing 1.36 Fencing - No change pg.276
R Disposal Systems
R10/11 Above ground
drainage 1.33 Above ground drainage pg.253
The principles for the measurement have not
changed.
R10.3, 4
and 5
Sockets tappings and
bosses 1.33.2 Ancillaries now include these items pg.254
COMPARISION OF PART 3 RULES- BUILDING
WORKS
R10.7 Supports These have been moved to BWIC missing pages
R10.15 Temporary operation This has been removed from the measurement
rules
R12/13 Below ground drainage 1.34 Below ground drainage pg 258
The rules for drainage have changed
considerably, the excavation and beds and
surrounds are not measured separately but
included in the drain run length. Pg.259
R12.1-6
Excavation and beds and
surrounds have all been
removed
1.34.1 Drain runs are now measured in average depth
for the whole run in 500mm depth stages. Pg.259
R12.11-15 Chambers 1.34.6-11 All chambers are numbered stating the depth
with a detailed description pg.263
1.34.13 /
1.34.14
Sundries such as step irons and covers are still
measured separately.
COMPARISION OF PART 3 RULES- BUILDING
WORKS
R12.19 O & M manuals These are now covered under the Preliminaries
section
X Transport systems 1.40 Transportation pg 304
X1-12 Different systems 1.40.1
Greater detail has now been included for each
system with the addition of separate items to be
included for the following Offload and position
equipment, assembly of component parts, free
issue items, interface and connection to other
systems.
X13 marking holes 1.41.2 Moved to BWIC section. Missing pages
X14 identification 1.40.3 This is now an item rather than numbered.
Pg.306
Y M & E Services 1.38 Mechanical pg.284
Y10/ Y11 Pipelines and ancillaries 1.38.3 Pipework - there has been considerable change
to the rules here. Pg.287
COMPARISION OF PART 3 RULES- BUILDING
WORKS
Y10.1 Pipes 1.38.3
Generally the pipe length is to include for all fittings
and the like. The measure of the pipe now needs to
identify the location of the installation. Pg.287
Y10.2.3 Fittings 1.38.4
There are two alternative rules which can be applied.
The metre measure for the pipe can be deemed to
include all fittings or they can be separated and
enumerated. The description of the fitting is to be
precise.pg.287
Y10.9 Pipe supports Removed and included in pipe measure or if special can
be under BWIC
Y11 Pipe sleeves 1.38.5 These are now included under ancillaries and again in
the BWIC section. Pg 288
Y20/ Y40 Equipment 1.38.1 Primary equipment
COMPARISION OF PART 3 RULES- BUILDING
WORKS
Greater detail has now been included for each
piece of equipment with the addition of
separate items to be included for the following
Offload and position equipment and assembly
of component parts. Pg 285
1.38.2
Terminal equipment and fittings - separated out
to identify equipment at the ends of pipe or duct
runs.
Y20.6 Supports These are now under the BWIC - where not
included as part of the equipment.
Y30 Air ductlines/ ancillaries 1.38.6
This is by metre length, generally the length is to
include for all fittings and the like. The measure
of the duct now needs to identify the location of
the installation.
There is an alternative of measuring the fittings
separately.
COMPARISION OF PART 3 RULES- BUILDING
WORKS
Y30.7 Ducting sleeves This has been removed and the hole
required is measured under BWIC.
Y50 Thermal insulation 1.38.9 Insulation and fire protection pg 289
Generally the principles have not changed.
There is again the need to provide the
location of the service.
There is also the alternative here to include
the insulation to fittings and the like within
the measured length or separately.
COMPARISION OF PART 3 RULES- BUILDING
WORKS
1.39 Electrical pg 295
Y60/ Y63 Conduit and cable
trunking 1.39.3
Generally containment is measured by length
including all fittings and ancillaries
Y60.1 -12 1.39.4
The rules have been greatly simplified however
there is an alternative whereby the fittings can be
enumerated separately. Pg.297 & 298
Forming holes or supports are covered under BWIC
section.
Y61/ Y62/
Y80
HV/ LV cables, busbar
trunking, earthing and
bonding
1.39.5 Cables are still measured by length but the
locations of the cables have been redefined. Pg.298
Terminations and glands are still enumerated
pg.298, but supports and holes are now measured
with the BWIC section but Missing in BESMM3.
COMPARISION OF PART 3 RULES- BUILDING
WORKS
Y62.7 Busbar
trunking 1.39.9 Busbar pg 300
This is by metre length, generally the length is to
include for all fittings and the like. The measure of
the busbar now needs to identify the location of the
installation. pg 300
1.39.10 There is an alternative of measuring the fittings
separately.pg.300
Y80.13 Tapes 1.39.11 Tapes Pg 301
The length now includes all joints and test clamps,
there is no alternative. Pg 301
COMPARISION OF PART 3 RULES- BUILDING
WORKS
Electrodes and terminations are enumerated Pg 301
Y61.19 Cables in final
circuits 1.39.7 Final circuits
These remain as numbered circuits identifying the location of
each circuit and the number and type of points. Pg.299
1.39.8 Modular wiring systems has been added. This is enumerated.
Pg.299
Y70/ Y71
HV switchgear, LV
switchgear and
distribution
boards
1.39.1 Primary equipment Pg.296
Enumerated by system stating location and with the addition of
separate items to be included for the offload and position of
equipment and assembly of component parts.pg 296
COMPARISION OF PART 3 RULES- BUILDING
WORKS
Supports if not provided with the
equipment are measured under BWIC.
missing
Y73/ Y74 Luminaires and lamps /
accessories 1.39.2
Terminal equipment has been included and
covers all the items in this section. They are
again enumerated.
Y81 Testing and
commissioning
1.39.15
& 16
Testing has been separated from
commissioning and further items have been
added for system validation training and
maintenance. Pg.302
Additional rules for
work to existing
buildings
The work to existing buildings has now been
absorbed into the various work sections.
COMPARISION OF PART 3 RULES- BUILDING
WORKS
INTERPRETING THE REQUIREMENTS OF
BESMM4
GENERAL RULES: Page 1, Item 1.3: Classification Tables
ITEM OR WORK
TO BE
MEASURED
UNIT FIRST
DIVISION
SECOND
DIVISION
THIRD
DIVISION
MEASURE
MENT
RULES
DEFINITION
RULES
COVERAGE
RULES
SUPPLEMENTAR
Y
INFORMATION
38 Plain
39Formed
40Cut
M 1.Dimensioned
description
2.Total depth
stated
1. Horizontal
2. Vertical
3. Curved,
radius stated
Accessories cast into insitu concrete
41 Type or
proprietary
reference stated
M2 1. Dimensione
d description
Cast in accessories
include anchor
bolts, dowels,
anchor boxes……..
m
nr
Page 157
1.3.1: Within the classification Table where a broken line is shown, the rules given
above and below the broken line may be used as alternatives depending on the
component of description
1.3.2: Measurement unit column disregarded in referring to columns
1.3.3: The left hand column of the
classification table lists descriptive features
commonly encountered in construction
work.
1.6. Descriptions/Supplementary rules
1.2 Off-Site Manufactured, Components or Buildings (Pg 97
Information Required Measurement
rules
Definition Rules Coverage Rules Supplemen
tary
Informatio
n
A Drawings that must accompany this section of measurement
1. Site plans
2. Plans
3. Sections
4. Elevations
5. Installation details
B. Mandatory Information
These are deemed to be
included:
C1 All factory applied
finishes
C2. Transport from factory
to site
C3 Offloading and storing
on site
C4. Setting, hoisting, and
placing in final position
Item or work to
be measured
Unit First
division
Second
division
Third Division
1.Component nr 1.Overall
Dimensio
ns
1.Descripti
on of
Component
1. Method of
fixing/installi
ng
2. Height above
structural
ground floor
level.
3. Services
connections
D1 These are
prefabricated
proprietary
components that
are not adequately
covered by the
other work sections
in this document
1.3.4 Pg.1 Each item description shall identify the work with respect to one descriptive feature drawn from each of
the first three columns in the classification tables and as many of the descriptive features in the fourth column as are
applicable (see item 1.2.1 under off-site manufactured materials)
INTERPRETING THE REQUIREMENTS OF
BESMM4
INTERPRETING THE REQUIREMENTS OF
BESMM4
1.4 Supplementary Rules pg.1(e.g. 1.3 Demolition, Pg 100)
INFORMATION PROVIDED MEASUREM
ENT RULES
DEFINITION
RULES
COVERAGE RULES
A Drawings that must accompany this section of measurement
B Mandatory information
1. Location drawings
2. Drawings of existing structures to show full extent of demolition
C Minimum information that must be shown on the drawings that
accompany this section of measurement
1. Lowest level of demolition
2. Extent of any temporary works not at the discretion of the contractor
3. Position and extent of any temporary works……
The following are
deemed to be included:
C1 All temporary works
unless stated otherwise
C2 Temporarily
diverting, maintaining or
sealing off existing
services
C3 Disposal of all debris
unless stated otherwise
1.4.1 Within the supplementary
rules, everything above the
horizontal line which is
immediately below the classification
table heading, is applicable
throughout the table
Page 100
1.4.2 Measurement rules set out
when work shall be measured and
the method by which quantities
shall be computed PG.1
1.2.2.
Prefabrica
ted
structures
Description
&Measurement
(see page 98)
1.2.2.1.1/
2 Prefabricated
structure 5000 mm
long x 3150mm high
overall size;
Roofs/External walls
nr
This same rules
apply to
prefabricated
building units 1.2.3
pg.98
APPLICATION OF BESMM4 RULES TO
SELECTED ITEMS OF WORK
APPLICATION OF BESMM4 RULES TO
SELECTED ITEMS OF WORK
1.3.1 Demolitions Pg 100 Unit
1.3.1.2.1.2 Demolish individual structures
(generator house, gatehouse),
bungalow with 225 hollow
sandcrete block wall; 5000mm x
4500mm overall on plan and
4500mm high to eave; retain
burglar proof for reuse.
Item
1.3.1.1.1.1,3 Demolish all structures (Main
building), Two storey reinforced
concrete framed structure with
225mm hollow sandcrete block
wall cladding; 25000mm x 18mm
on plan overall; 10500mm high;
treat all asbestos before disposal
and all structural steel members
remain the property of the
employer.
Item
1.3.2.Tempora
ry support of
structures
Provide temporary support to
entrance porch; size 6500mm x
3500mm x 3000m high overall
1.3.2.1.1
1.5 Excavating and Filling (page 116)
This section is referred to as Ground work in BESMM3 (D20). It is a requirement in BESMM3 that earthwork support be measured to faces of excavation exceeding 250mm high whether or not required (D20.7. page 32).
BESMM4 four takes a different approach to excavation in that the following items are deemed to be included:
Disposal of all surface water.
Support to faces of excavation unless not at the discretion of the contractor.
Working space.
Excavation and filling for temporary works unless not at the discretion of the contractor.
Levelling, grading, trimming and compacting surfaces exposed by the excavations.
Curved work.
Multiple handling of excavated materials on site unless specified.
All excavated material is deemed to be inert unless described otherwise.
This supposed to be contained at pg.116 of BESMM4, but there seem to be a mixed up in printing as items deemed included are spread under Measurement rules, Definition Rules, coverage rules and supplementary information (likely to be a printing error).
APPLICATION OF BESMM4 RULES TO
SELECTED ITEMS OF WORK
1.5 Excavating & Filling
1.5.1.2.1.1 Preliminary site work:
Trial pits to locate existing services; 1200mm maximum depth; 25m N/E of the
proposed building
nr
1.5.3.3.1 Removing trees.
Girth over 3,000 but not exceeding 4500mm; filling with imported rock laterite.
nr
1.5.6.1.1
1.5.9.2
Excavation:pg 121
Bulk excavation (Reduce level; Basement, Pond, etc) n.e 2m deep commencing at
(Strip level; bottom of trench exc. Bottom of basement excavation) as the case may
be
&
Disposal of excavated material offsite (pg 125)
M3
M3
1.5.6.1
1.5.11.2.2
Excavation pg 121
Foundation excavation commencing from strip level n.e 2m deep.
&
Filling obtained from excavated materials final thickness of filling exceeding 500mm
deep, compacted in 150mm layers
if thick ness of
filling is less
than 500mm
thick it
measured in M2
m3
APPLICATION OF BESMM4 RULES TO
SELECTED ITEMS OF WORK
1.10 CRIB WALLS, GABION AND REINFORCED
EARTH (Pg 143)
1.10.1.1.1 Crib walls (kind and
quality of materials
stated) 900mm
thick, vertical
M
2
See
coverage
rules for
deemed
included
features
APPLICATION OF BESMM4 RULES TO
SELECTED ITEMS OF WORK
1.10.3.1 Gabion basket walls,
basket size 20m long x
1.2m high x 450mm
thick, made of 6mm
diameter mild steel wire
laid on 600mm wide
concrete base, vertical
and filled with live rock
boulders
M2
1.10.4.1.1.
1 Reinforced Earth
APPLICATION OF BESMM4 RULES TO
SELECTED ITEMS OF WORK
1.11 Concrete Work page 146
1.11.2.1.2.1 Plain in-situ concrete (1; 2; 4) horizontal work n.e
300mm thick in structures, poured against earth surface
in fdn ftg.
M3
1.11.5.2.1 Reinforced in-situ concrete (1:2:4) vertical work
exceeding 300mm thk. in structures
Formwork Page
151
1.11.13.1 Plain formwork to sides of bases n.e 500mm high M
1.11.13.2 Ditto: exceeding 500mm high M2
1.11.15.1.2 Ditto: soffits of horizontal work n.e 300mm thk propping
over 3m but n.e 4.5m high
M2
APPLICATION OF BESMM4 RULES TO
SELECTED ITEMS OF WORK
Reinforcement
Pg 155
1.11.34.1 High yield steel bar 16mm diameter, straight.
(requirement to state length not clear)
t
1.11.37.1-3 Mesh reinforcement weighing 3.952kg/m2, Ref. A??
with 200mm laps at both ends
APPLICATION OF BESMM4 RULES TO
SELECTED ITEMS OF WORK
Mechanical, Electrical and Transportation Details rules for the measurement of items of building services in BESMM4 are contained in sections 38 – 40: Section 38: Mechanical Services Section 39: Electrical Services Section 40: Transportation
1.38 Mechanical Services
1.38.1.1 Primary Equipment.
Air Handling Unit, ABC or equal and approved (specification) located
900mm above floor level in plant room
nr
1.38.1.2 Off-load and securely position primary equipment in site store nr This should be item
2. In BESMM4
1.38.2.1.1.
1
Terminal equipment and fittings, York fan coil unit type (catalogue
Ref.no) fixed to ceiling
nr
1.38.2.1.1.
1
Terminal Equipment, Supply Diffuser, ABBA or equal and approved
(Catalogue Ref.no), size 600 x 600mm fixed to fan coil unit in ceiling.
nr
1.38.6.1.1.
1
Ventilation duct, galvanised sheet rectangular metal duct size 300x
75mm (specification with approved joints) and fixing at high level to
soffit of reinforced concrete slab
nr
1.38.12.1.1
.1
Insulation to ventilation duct, n.e 25mm thk, 300x 75mm to high level
ducts
m2 1.38.12 should be
ventilation duct and
not pipe ancillaries
1.38.15. Fire stopping (specification) mechanically fixed in ventilation duct, with 2
hours fire resistance
nr
1.38.16.3 Identification labels Item
1.38.17 Testing Item
APPLICATION OF BESMM4 RULES TO
SELECTED ITEMS OF WORK
1.39. Electrical Services
1.39.1.1.1.
1
Primary Equipment, Medium voltage panel (MV), low level on floor
(specifications stating the number of incomings & outgoings) with method of
fixing (description of Plinth or background to which it is fixed)
nr
1.39.1.2 Off-load and position of primary equipment (MV panel) nr
1.39.2.1.1.
1
Terminal Equipment, Switch socket outlet, ABB 15A fixed to wall nr
1.39.3.1.1 Cable containment, 150 x 50mm diameter PVC trunking screwed to
block/concrete work in : wall/floor/ceiling
m
1.39.5.1.1 Cables, 120mm2 XPLE 4 core armoured cable drawn in services ducts (from
transformer to MV panel)
m
1.39.8.1 Measurement of modular wiring may be similar to that of measurement in
final sub circuit
APPLICATION OF BESMM4 RULES TO
SELECTED ITEMS OF WORK
1.40 Transportation page 304
1.40.1 Light Passenger Panoramic lift
with the with rated load of 13
passengers and speed of 1m/s, 5
stops and two panel centre
opening automatic car landing
door ………..
nr
1.40.1.4 Free issue fixing steel work ------
APPLICATION OF BESMM4 RULES TO
SELECTED ITEMS OF WORK
Builder’s work in connection with mechanical, Electrical and Transportation installations
This section contains a total of 14 items of work:
General builder’s work in connection with (Item)
Marking position of holes, mortices and chases in the structure (item)
Pipe and duct sleeves (nr)
Bases, Plinths and the like (nr)
Duct covers and frames (m/nr)
• Support for services not provided (m/n)
Catenery cables (m)
Works for services installations in existing buildings have the following 5 items:
Cutting holes through existing structures (nr)
Cutting mortices and sinking in existing structure (nr)
Cutting chases through existing structures (m)
Lifting and replacing floor boards (m)
Lifting and replacing duct covers or chequer plates (m)
Work for external services installations includes 2 items:
Underground services runs (m)
Items extra over service runs irrespective of depth or pipe size.
• This section is omitted from the BESMM4 and no appropriate cross references provided to guide the measurement. The
reasons for this are not known and perhaps the the section is part of the missing pages.
OBSERVATIONS