user guide tradstair - trad hire and sales...safety on site as is the case with any scaffold, only...

TRADSTAIR USER GUIDE

FOCUSSED ON SERVICE

TRADHIRE & SALESSCAFFOLDINGSUPPLIER

TRADSTAIR User Guide

You should read and ensure you understand this manual in its entirety prior to commencing work.

Only trained and competent operatives should erect, dismantle or modify the TRADSTAIR System at all times.

PLEASE NOTE

DISCLAIMER:

Whilst TRAD Hire & Sales Ltd and the author have made every reasonable effort to ensure that the information contained within this user guide is correct at the time of printing, you should be aware that TRAD Hire & Sales Ltd and the author do not accept any liability for any inconvenience, loss or damage caused by the result of any inaccuracy, or omission, within this publication.

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© TRAD Hire & Sales Ltd 2020

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GUIDANCE NOTE

This manual is valid only for the use of Genuine TRADSTAIR System supplied by TRAD Hire & Sales Ltd.

TRAD Hire & Sales Ltd reserve the right to alter or amend without notice the design and / or specifications of any of the equipment forming part of the TRADSTAIR System, in the interests of improvement.

TABLE OF CONTENTS

About TRAD Hire & Sales Ltd

About TRADSTAIR

TRADSTAIR and Safety

Manual Handling

Safety on Site

General Rules for Safety

Components

Erection and Dismantling Guidance

Loading

Tying

Safe Working Heights of the TRADSTAIR System

Personnel Capacities

Other Products

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AB

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TRAD Hire & Sales Ltd, a member company of the TRAD Group, is one of the UK’s market leaders for the supply of system scaffolding, scaffold tube, fittings, boards, stair towers, temporary roofing systems and associated equipment.

All the products we stock are of the highest quality and comply fully with all relevant British or European Standards. In addition, with our commitment to exceeding all safety standards, all our products, whether sourced internationally or within the UK, are subject to thorough testing by qualified external UK & European testing bodies.

From the smallest requirement to complete hire or sale packages, our UK-wide network of depots have the resources and capabilities to meet every demand.

TRAD Hire & Sales Ltd is a full non-contracting member of the National Access & Scaffolding Confederation (NASC) and is a fully accredited ISO 9001 company.

The TRAD Group is a member of the Altrad Group of companies.

ABOUT TRAD HIRE & SALES LTD

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STAIR

ABOUT TRADSTAIR

TRADSTAIR is an independent access stair system comprised of high quality manufactured prefabricated components, which is designed to provide safe and efficient access to on-site work locations. The stair tower is a flexible and versatile system designed for use as an independent structure, or can be integrated with other scaffolding systems, tube & fitting scaffolds or staging.

TRADSTAIR is assembled from standards, ledger beams, purlin rails / frames, stair flights, landings, guardrails and handrails. All components are manufactured from high quality galvanised steel conforming to current British and European standards.

Components are also subject to regular testing by independent and approved UK testing facilities, and are marked with TRAD identification with month / year of manufacture providing full traceability. In addition, the system is approved by the NASC and meets the requirements of their Code of Practice.

The TRADSTAIR is flexible system and versatile in use, and this guide sets out the components of the system and how to use them. For further information on TRADSTAIR components and applications please contact your nearest TRAD Hire & Sales Branch (locations are detailed on the rear cover of this guide).

TRADSTAIR offers many benefits including:

Strength The TRADSTAIR design makes it extremely robust with permissible loads (personnel) exceeding those of alternative stair systems.

Speed The system’s design makes the TRADSTAIR faster and simpler to build than alternative stair systems.

Flexibility TRADSTAIR can be used as an independent stair or in conjunction with traditional tube and fitting scaffolding or system scaffolding.

Cost Savings The TRADSTAIR is easy to assemble and is designed to maximise productivity and improve

efficiency on site.

TRADSTAIR is tested in line with the ISO 9001 series of quality management systems and has met or exceeded the criteria to satisfy BS EN 12810, BS EN 12811 and the NASC Code of Practice.

TRADSTAIR and it’s associated products offer compliance with the current editions of the following:

BS EN 12810—1 Façade Scaffolds Made of Prefabricated Components — Product Specifications.

BS EN 12810—2 Façade Scaffolds Made of Prefabricated Components — Particular Methods of Structural Design.

BS EN 12811—1 Temporary Works Equipment — Scaffolds — Performance Requirements & General Design.

BS EN 12811—2 Temporary Works Equipment — Information on Materials.

BS EN 12811—3 Temporary Works Equipment — Load Testing.

BS EN 39 Loose Steel Tubes for Tube and Coupler Scaffolds — Technical Delivery Conditions.

BS EN 10219—1 Cold Formed Welded Structural Hollow Sections of Non-Alloy and Fine Grain Steels — Technical Delivery Conditions.

BS EN 74 Series Couplers, Spigot Pins and Base Plates for use in Falsework and Scaffolds.

BS 1139-2-2+A1 Metal Scaffolding — Couplers and Fittings — Couplers and Fittings outside the scope of BS EN 74 — Requirements and Test Methods.

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The current edition of the Work at Height Regulations places a duty on employers to protect individuals from harm. Scaffolding inevitably carries a risk of falling from height and consequently, it is of paramount importance that all activities are assessed for risk, planned and a safe system of work is adopted during any scaffold activity. It is therefore strongly recommended that the procedures outlined in the NASC’s guidance note SG4 – “Preventing Falls in Scaffolding Operations” are followed. SG4 describes several safe working methods, including the use of collective fall protection systems such as an advanced guardrail, or the use of scaffolder’s steps.

To ensure the safety of TRADSTAIR erectors, it is important that fall protection equipment is only attached to those components that are capable of withstanding any likely imposed loads. This section details the key components acceptable for attachment, based on all scaffolds being erected in accordance with this guide.

Note: All Lanyards must conform to the parameters and standards set out in the NASC’s Guidance Note SG4. The length of restraint lanyards must not exceed 800mm (1.0m including connectors).

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TRADSTAIR AND SAFETY

Competence of Erectors1 Harness and LanyardAnchor Points3

Competence of individuals working at height is now a direct requirement of the current “Work at Height” regulations. Consequently, employers have a duty to ensure that all individuals involved in the erection, modification or dismantling of any scaffolding equipment have received the training necessary to enable them to carry out their work in a safe manner.

This User Guide and the availability of an TRADSTAIR system specific and dedicated training course (via our nationally accredited training partners) ensures that all users have access to achieve the requisite level of competence.

For further information please contact your local TRAD Hire & Sales Ltd. Depot, details of which can be found on the rear cover of this guide or visit www.tradhireandsales.co.uk

Work at Height / FallPrevention / Fall Mitigation2 While the current Work at Height Regulations

requires that work at height be carried out safely, they also require that contingency plans be made for any eventuality. This extends to making plans to rescue personnel suspended by fall arrest equipment. Personnel should be fully trained to carry out a rescue, such as a manual handling rescue as recommended by the NASC and, where applicable, be trained in the use of specific rescue equipment which they may be asked to employ in the event of a suspended casualty.

Note: Details relating to rescue and what should be considered can be found in the latest editions of the NASC guidance notes SG4 & SG19 (SG19-”A Guide to Formulating a Rescue Plan”).

Rescue of SuspendedCasualties4

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GUIDANCE NOTE

ATTACHMENT CAN ONLY BE MADE TO THE FOLLOWING COMPONENTS!

Fall Arrest & Restraint Lanyards:

TRADSTAIR Standards between 2m lifts, secured above & below using ledger beams.

Ledger beam or single tube ledger, secured at both ends.

Restraint Lanyards Only:

Purlin Frames, secured at both ends.

Purlin Rails, secured at both ends.

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The following basic rules should be adhered to when manually handling the TRADSTAIR system and associated components.

Plan lay down / storage areas in advance, to reduce the distance materials have to be manually handled.

Always check the transit route before manual handling, to ensure that it is suitable and free from obstructions and any tripping hazards.

When handling long materials, beware of damaging property, overhead electric lines, other people and moving vehicles.

Only tackle loads that can be reasonably handled by the individuals involved – i.e. consider personal physical capabilities.

Manual handling operations should be eliminated where possible, by using mechanical handling equipment and manual handling aids whenever possible. These include light-lines, gin wheel, forklifts and cranes etc.

Use the correct knots and hitches when using rope to lift equipment, as per NASC Safety Guidance SG9.

Note: Details relating to manual handling and what should be considered can also be found in the latest edition of the NASC guidance note SG6 – “Manual Handling in the Scaffolding Industry”.

Make sure your feet are on a firm level base, a comfortable distance apart (Approx. 300mm).

Use your legs and not your back to bend.

Raise your head slightly and tuck in your chin to keep your spine straight.

Avoid turning / twisting the trunk of the body.

Always use the correct kinetic handling technique:

MANUAL HANDLING

GUIDANCE NOTE

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SAFET

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As is the case with any scaffold, only trained and authorised scaffold operatives should carry out the erection, dismantling or modification of a TRADSTAIR structure. Consideration must always be given to those that may be affected by the works being carried out. To ensure that the highest standards of safety performance are maintained, consideration should be given to the following:

1 If the tower is on rough or uneven ground, ensure that it is erected on adequate timber sole boards which are properly levelled and bedded, and that the ground is capable of withstanding the proposed loadings.

2 All entrance steps, stage landings andstair flights must be free from obstructions, trip hazards or projections. Where there is a risk of items falling from stage landings the TRADSTAIR toe boards must be used, and the use of brickguards considered.

3 Do not load the TRADSTAIR Tower with materials or equipment. All material or equipment is to be stored on the main scaffold structure or loading towers. Information on the permissible safe working load capacity of the main scaffold structure or loading towers should be obtained from the original supplier.

4 All TRADSTAIR towers require adequate ties, and in some cases bracing. Neither should be removed without giving consideration to firstly installing alternative bracing or ties, to ensure the continued safety of the tower (further design may be required).

5 All TRADSTAIR towers must be erected in strict accordance with this user guide. Any configurations outside the scope of this guide including sheeting, netting or other similar wind sails should be referred to a person competent in the design of TRADSTAIR.

6 Any unauthorised interference should be immediately reported to site management with any incomplete or unsafe parts of the scaffold being clearly marked and access restricted.

7 All TRADSTAIR components require visual inspection before use. No damaged equipment should be used within the structure. Any equipment found damaged should be immediately set aside in a quarantined area, clearly marked and senior management informed. Maintenance and repair procedures should only be carried out by qualified / approved personnel.

8 Always wear appropriate PPE with Hi-Vis where required.

SAFETY ON SITE

Head protection

Protective overalls

Steel toe cap boots

Eye protection (when required)

Full harness fall arrester

Protective gloves

Typical PPE requirements

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Always ensure all who erect, adapt and dismantle the scaffold are trained and competent to do so.

Always ensure all risk assessments and method statements have been carried out, then communicated to those concerned, and understood.

Always ensure that there is adequate storage space for the materials.

Always ensure that there is clear access to the work area and that the ground is level and suitable for the scaffold.

Always work to current SG4 guidelines.

Always ensure that there are adequate tying points.

Always ensure loads are evenly distributed.

Always ensure scaffold inspections are carried out and recorded as per current legal requirements.

Always ensure that all defects are notified to the site management immediately.

Never let untrained persons erect, modify or dismantle the scaffold.

Never remove guardrails, toe boards or brick guards.

Never remove ties without prior approval.

Never create gaps in platforms by removing decks or boards.

Never remove restrictions or warning signs from the scaffold structure.

Never undermine the scaffold by digging trenches underneath or near the base.

Never add sheeting or netting without prior approval.

Never use damaged materials.

Never allow unqualified / unapproved personnel to repair damaged equipment.

Never load directly on to the access scaffold’s working platform (always use a loading tower).

Never overload the scaffold.

Safety is no accident. Don’t risk it – if in doubt ask!

GUIDANCE NOTE

The information given in this TRADSTAIR user guide relates solely to genuine TRADSTAIR equipment supplied by TRAD Hire & Sales Ltd.

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GENERAL RULES FOR SAFETY

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These items form the vertical members of the scaffold and are made from 48.3mm diameter x 3.2mm thick high-grade steel tube. They incorporate the distinctive cluster of connection pockets which are welded at 500mm centres. The top pockets of lowest cluster are located at 385mm from the bottom of the standard, to the upper surfaces of the pockets. The pockets are the fixing points for the horizontal components of the system such as Ledger Beams Single Tube Ledgers and Purlin Rails.

At the top of the standards, there is a 170mm crimped spigot that allows the vertical connection of further standards and there are corresponding drilled holes, at the bottom and top of each standard, to allow two standards to be bolted together.

COMPONENTS

Standards1

A combined jack and base plate designed for levelling the scaffold where the ground or foundation levels vary. These are adjusted by winding the collar up and down the threaded stem.

This component acts as the ledger of the system at the platform / landing levels.

Can be interchanged with the 1.65m ledger beams.

Code Length (m) Weight (kg)

159581 1.65 7.16

Adjustable Base Jacks2

Single Tube Ledger3Code Length (m) Weight (kg)

159502 3.00 15.72

159503 2.00 10.78

159504 1.50 8.31

Code Height(m)

Max Adj(m)

Weight(kg)

127005 0.65 0.50 3.40

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The 3.05m ledger beam acts as the transom of the system at the platform / landing levels and provides support to the stage landings prior to the installation of the stair-flights.

The 1.65m length can be used as an alternative to the 1.65m single tube ledger and acts as a ledger of the system.

Ledger Beams4


159516 3.05 15.06

159519 1.65 8.15

This component provides single guardrail function and is available in 3.05m, 2.16m and 1.65m sizes.

Purlin Rails5


149109 3.05 8.76

159544 2.16 7.95

149111 1.65 6.60

This component provides double guardrailfunction and is available in 3.05m, and 1.65msizes.

Purlin Frames6


159530 3.05 12.96

159532 1.65 8.74

Provides initial step access to first level stage landing.

Entrance Step7


159554 1.65 13.50

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These steel units provide interconnecting stairaccess to each level, and come complete withhooks top and bottom, which connect to thecorresponding pockets on the stage landings.

Stair Flights10

Used to form the landing platforms of the system, these components are laid directly onto the 3.0m ledger beams using the hooks provided.

Integral pockets provide connection points for stair-flights and handrail posts.

Stage Landings8


159552 1.65 23.20

Fitted to the corresponding pockets in the stage landings to provide the connection points for stair handrails.

Handrail Posts9


159553 1.00 5.16


159546 2.00 35.10

159547 1.50 28.50

159548 1.00 42.50

Provides internal double handrail for all stair flight sizes. These components are connected to the appropriate pockets on the handrail posts.

Stair Handrails11

Code Lift Height(m) Weight (kg)

159549 2.00 10.45

159550 1.50 9.55

159551 1.00 9.00

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Fitted to a 3.05m ledger beam and connected to 2.16m purlin rails, to form guardrails when providing access or egress at the side of a tower.

Clip On Post12


159542 1.00 6.60

This component provides double guardrailprotection to the internal face of the stagelanding, at the entrance of the stair tower.

Folding Guard Frame13

Code Weight (kg)

159556 8.71

This component provides double guardrailprotection to the internal face of the stagelanding, at the top of the stair tower.

Guardrail Frame14

Code Weight (kg)

159555 6.95

This temporary component provides a safeand lightweight means of constructing andassembling the TRADSTAIR Tower components.

Erection Platform15


159620 1.65 14.50

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To prevent injury to any person where there isa danger of falling materials or objects from aplatform, these components must be fittedto the outside edge of the stage landings, to prevent such an occurrence.

Toe Boards16

Code Description Weight (kg)

159625 End Toe Board 7.00

159630 Side Toe Board 3.05

159635 Top Toe Board 3.05

End Toe Board

Side Toe Board

Top Toe Board

This optional item allows a pair of operatives to erect the guardrails of the lift above, from the safety of the completed level below.

Advanced Guardrail Tool17

Code Weight (kg)

159660 1.40

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ERECTION & DISMANTLING GUIDANCE

This section describes the basic erection and dismantling procedures for TRADSTAIR Towers.

As with all scaffolding, only trained, competent operatives should erect, dismantle or modify TRADSTAIR Towers at any time.

TRAD Hire & Sales Ltd recommends, that as a minimum, the working practices for all scaffold activities set out in the NASC’s document SG4 – “Preventing Falls in Scaffolding Operations” are applied at all times.

The erection and dismantling procedures described in this guide are based upon a minimum of two operatives, wearing work restraint twin tail lanyards of 800mm (1.0m including connectors). When outside of any collective fall prevention methods, or when accessing / working from temporary platforms, these work restraint lanyards must be used at all times.

Prior to commencing work, make sure all method statements, risk assessments and permits are in place, and that suitable tie points are available.

The structure against which the tower is erected, and upon which it relies for its stability, must be sound and an inherently stable structure.

Ensure that the ground is level and firm and capable of taking the imposed load of the completed scaffold. Where required, use wooden sole boards of the correct size to spread the load over the ground.

Determine the position of the tower and set out the TRADSTAIR tower according to the ground levels and where access / egress points are required.

Start constructing the tower from the most convenient point and, where practicable, at the highest ground level.

Current legislation states that, when complete, a scaffold is required to be inspected:

Before being used for the first time.

Following significant alteration.

At least every seven days from the date of the last inspection.

Following adverse weather or any event likely to have affected its strength or stability.

Further advice on inspection and handover requirements can be found in the current edition of the NASC’s publication SG35 “Guidance on the Handover of Scaffold Structures”.

Note: If using advanced guardrails or scaffolder’s steps, information relating to the use of these products should be obtained from the original supplier.

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BASIC ERECTION PROCEDURE

Screw adjustable base jacks to their estimated height, and layout with wooden sole boards or plastic pads (dependent on the make-up of the supporting ground), along with 3.05m ledger beams and 1.65m single tube ledgers (or 1.65m ledger beams) in their approximate positions (Fig.1).

While holding the standard, fix the first 3.05m ledger beam and 1.65 single tube ledger (or 1.65m ledger beam) into position at the lowest pocket cluster. Connect the 1.65m length to the lower level pockets of the cluster and the 3.05m length to the higher level, engaging all locking catches as you proceed (Fig. 3).

Step 1 Step 3

Fig. 1 Fig. 3

Progressively complete the rectangle of the base lift by connecting the adjustable base jacks, standards and ledger beams, engaging all locking catches as you proceed (Fig. 4).

Using the desired size of standard fit an adjustable base jack into the bottom, with the lower pockets facing 1.65m direction and the upper pockets facing the 3.05m direction, this pocket direction is repeated for all standards within the tower (Fig. 2).

Note: When using the Half-Lift erection method it is necessary to always have at least two pocket clusters above the platform level. This enables the advance fixing of the guardrails from the level below. This is achievable by forward planning and by the use of various different standard sizes.

Step 2 Step 4

Fig. 2 Fig. 4

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Fit the entrance step, the tongues are located into the upper or lower outer pockets of the standards, depending on the height of the first level from the ground (Fig. 7).

Check the distance from the structure at both ends, using a tape measure if necessary (Fig. 5).

Step 5 Step 7

Level the structure using the adjustable base jacks with the aid of a spirit level, making any adjustments necessary (Fig. 6).

Fix two stage landings at the entrance side of the base lift and two erection platforms to the opposing side, then check for square, a tape measure can be used if necessary (Fig. 8).

Step 6 Step 8

Fig. 5 Fig. 7

Fig. 6 Fig. 8

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Depending on the required height of the first lift, create a temporary platform using four erection platforms. These are located onto the guardrail erected in step 9. The two erection platforms originally located onto the ledger beams of the base lift are used with the addition of a second pair (Fig. 11).

Use two 3.05m purlin frames and two 1.65m purlin rails (or 1.65m single tube ledgers) to create a guardrail on all four sides of the tower, engaging all locking catches as you proceed (Fig. 9).

Note: Where a 1.0m lift height, and therefore a 1.0m stair-flight is required, the guardrails are substituted for the ledger beams of the next level, with single tube ledgers in the intermediate position. This method is used for all further lifts utilising a 1.0m stair flight.

Step 9 Step 11

Top out the standards if necessary, and then create the next lift at the desired height using two 3.05m ledger beams and two 1.65m sinlge tube ledgers (or 1.65m ledger beams), engaging all locking catches as you proceed (Fig. 10).

Note: Where a 2.0m stair-flight is to be used, a 3.05m single tube ledger must always be installed to the pocket cluster between the lower lift guardrail and the upper lift ledger beams, on the side the stair-flight is to be installed.

Standing on the temporary platform described in Step 11, the tower must now be tied to the adjacent structure, using the method described in the Tying section of this guide on pages 30 to 31. On the access / egress side this is just above the first lift level (this allows clear headroom), and the opposing side just below the first lift (Fig 12).

Step 10 Step 12

Fig. 9 Fig. 11

Fig. 10 Fig. 12

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Take the first stair-flight, position vertically and locate the lower tongues into the left hand pockets of the base lift stage landing (Fig. 16).

Note: Stair-flights should be erected in a clockwise location.

Top out the standards if necessary, and fit the guardrails of the next lift, engaging all locking catches as you proceed. Once complete, remove the temporary platform and relocate two of the erection platforms to their previous position within the tower. Set aside the second pair of erection decks and store safely for later use (Figs. 13 & 14).

Step 13 Step 15

Lift the inner stage landing from the base lift and locate on the 3.05m ledger beams of the next lift, and push towards the centre of the bay (Fig. 15).

Lower the top of the stair-flight onto the first lift stage landing and push forward until the upper tongues are located into the pockets of the top landing. It is important at this point to check that both the upper and lower tongues of all stair-flights are fully located into both stage landings (Fig. 17 & 18).

Step 14 Step 16

Fig. 13 Fig. 16

Fig. 15 Fig. 17

Fig. 14

Fig. 18

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The stair handrail is located into the pockets of the guardrail posts and the locking catches engaged (Fig. 21).

Locate the guardrail posts into the pockets of the stage landings, from the erection platforms and stage landing (Fig. 19).

Step 17 Step 19

From the ground, remove 3.05m purlin rail which forms the base lift guardrail at the rear of the tower and fit the folding guard frame into the stair guardrail post and the standard at the entrance of the stair, engaging all locking catches (Fig 20).

Fit a temporary top guard frame whilst standing behind the stair handrail (Fig. 22 & 23).

Step 18 Step 20

Fig. 19 Fig. 21

Fig. 20 Fig. 22 Fig. 23

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For 1.5m and 2.0m lift heights, create a temporary platform using the erection platforms 1.0m below the required lift level. The two erection platforms which are currently positioned on the ledger beams are used, with the addition of the second pair. (Fig. 26).

Note: Paying particular attention to the working practices set out within SG4, it is necessary to temporarily remove the stair handrail to facilitate the use of the temporary erection platforms, when a 1.5m lift height is required.

Relocate the two erection platforms from the lower lift onto the next lift level, directly above the lower stage landing (Fig. 24).

Note: The 1.65m purlin rail, forming the temporary guardrail at the entrance, may be removed at this point, to provide ease of access.

Step 21 Step 23

Access the erection platforms from the stair-flight, top out the standards as necessary and complete the next ring of ledger beams / single tube ledgers at the required height, engaging all locking catches as you proceed. Remember to fix the 3.05m single tube ledger on the side adjacent to where a 2.0m stair flight is used, again located into the pocket cluster between the lower lift guardrail and the upper lift ledger beam (Fig.25).

Standing on the temporary platform described in Step 23, the tower must now be tied to the adjacent structure, just below the new lift level on each side. This is carried out using the methods described in the Tying section of this guide on page 30 to 32 (Fig. 27).

Step 22 Step 24

Fig. 24 Fig. 26

Fig. 25 Fig.27

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Locate the next stage landing onto the 3.05m ledger beams of the second lift, and push towards the centre of the bay (Fig.30).

Again standing on the temporary platform, top out the standards if necessary and fit the guardrails of the next level, engaging all locking catches as you proceed (Fig . 28).

Step 25 Step 27

Remove the temporary platform and relocate two of the erection platforms to their previous position on the ledger beams. Set aside the second pair of erection decks and store safely for later use (Fig. 29).

Carry the next stair flight up the staircase, and position vertically ready to locate the lower tongues into the left hand pockets of the stage landing (Fig. 31).

Step 26 Step 28

Fig. 28 Fig. 30

Fig. 29 Fig. 31

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Repeat Steps 17, 19 and 20 to complete the stairguardrail (Fig. 35).

Whilst one operative holds the stair flight,another removes the temporary top guardframe, to be re-used at the next level (Fig. 32).

Step 29 Step 31

Lower the top of the stair-flight onto the top stage landing and push forward until the upper tongues are located into the pockets of the landing (Figs. 33 & 34). It is important at this point to check that both the upper and lower tongues of the stair-flight are fully located into the corresponding pockets of the stage landings.

For further lifts, repeat the methods described in Steps 21 to 31 for each subsequent lift until reaching final exit level or mid exit points, ensuring the tower is tied at each level prior to moving to the next.

Step 30 Step 32

Fig. 32 Fig. 35

Fig. 33 Fig.34

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Toe boards must be fitted where there is “a danger of falling materials” and may be fixed after the whole tower structure is complete, or at each level prior to moving to the next (Figs. 39 & 40).

a) Side toe boards are hooked directly over the 3.05m ledger beams.

b) The tongues of the end toe boards are located directly into the outside pockets of the standards.

c) The top toe board’s tongue is fixed into the pocket of the guardrail post and the flange around the top guard frame.

For a landing with an end exit, the 1.65m purlin frame which would normally form the guardrail in that position is omitted, allowing access / egress to the tower. In the case of a top landing, the temporary top guard frame described in Step 20 becomes permanent (Fig. 36).

Step 33 (a) Step 34

For a landing with a side exit, the 3.05m purlin frame which would normally form the guardrail in that position is replaced using a clip-on post, which is attached at the lift level to the 3.05m ledger beam, and two 2.16m purlin rails, allowing access / egress to the tower. In the case of a top landing, the temporary top guard frame described in Step 20 becomes permanent (Figs 37 & 38).

Note: It is only possible to have a side exit within a 2.0m lift.

Step 33 (b)

Fig. 36

Fig. 40

Fig. 37 Fig. 38

Fig. 39

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ADVANCED GUARDRAIL TOOL

When available, the advanced guardrail tool allows a pair of operatives to erect the guardrails of the next lift from the level below. This negates the need to employ the temporary platform at the half-lift position, as is shown in figures 11 to 13 and 27 to 28, but rather keeps the platforms at the lift height as shown in figures 8 to 10, 14 to 25 and 29 to 34.

Locate the advance guardrail tools onto the top and bottom chords of the purlin frame, one to the left and one to the right hand side of the frame, next to the vertical stiffeners.

With an operative standing at either side, lift the purlin rail upwards and offer into position (Fig. 41).

Step 1

Locate the tongues of the purlin frames into the corresponding pockets of the standards, then pull the frame downwards into position. Remove the tools and ensure all locking catches are engaged. (Fig. 42). Repeat for all four sides of the tower.

Step 2

Fig. 41 Fig. 42

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BASIC DISMANTLING PROCEDURE

Prior to commencing work, make sure all method statements, risk assessments and permits are in place.

Step 1

Check that the tower is still in the properly erected condition. Make sure that all components and ties have not been interfered with and all stage landings are clear of any loose material and debris prior to dismantling.

Step 2

Decide on the safe lowering method by which the components shall be removed to the ground, for example hand to hand, crane, hoist, forklift truck or hand-line, as per NASC Safety Guidance SG9.

Under no circumstances should ‘bombing’ be used to lower equipment.

Once components are safely on the ground they should be stacked neatly ready for transportation.

Step 3

All components fixed above the top platform’s guardrails should be removed. Components should then be lowered to ground level.

Step 4

The tower can now be dismantled, paying particular attention to the current NASC guidance note SG4 — ”Preventing Falls in Scaffold Operations”.

Note: If using a temporary advanced guardrail or scaffolder’s step, information relating to the use of these products should be obtained from the original supplier.

Step 5

Remove any toe boards and associated brackets from the top platform and transfer to the ground.

Step 6

Create a temporary platform using two erection decks, side by side, 2.0m directly below the top stage landing.

Step 7

While standing behind the upper stair handrail, remove the top guardrail frame and set aside for temporary use during the dismantle process.

Step 8

Remove the upper stair handrail and top guardrail post and lower to the ground.

Step 9

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Repeat steps 6 to 15, dismantling and lowering the scaffold in the sequence described.

Note: Ties should be dismantled progressively, and only be removed when they prevent further dismantling.

Carefully remove the upper stair-flight from the pockets of the two stage landings it connects. Push the top of the flight until the unit is in the vertical position and resting on the lower of the two stage landings.

On the lower landing, use the top guardrail frame (which was set aside in step 8) to provide a temporary guardrail to the position vacated by the stair-flight.

Lower the stair-flight carefully to the ground level.

Step 10

Remove the upper stage landing and lower to the ground.

Step 11

Create a temporary platform using four erection decks 1.0m below the top lift level.

Note: Paying particular attention to the working practices set out within SG4, it is necessary to temporarily remove the stair handrail to facilitate the use of the temporary erection platforms, when a 1.5m lift height is in position.

Step 12

Reposition the erection decks to the same location as described in step 7.

Step 14

Progressively dismantle the ledger beams that comprise the top lift, along with any ‘topped-out’ standards and ties positioned at that level.

Lower all components carefully to the ground level.

Step 15

Step 16

At ground level, once all platforms and guardrails have been dismantled and the entrance step has been removed, dismantle the ledger beams while holding the standards so they do not become unstable.

Remove the standards from the adjustable base jacks when they are no longer attached.

Step 17

If any element of this dismantling sequence cannot be complied with, please seek advice from your local TRAD Hire & Sales Ltd depot, details of which can be found on the rear cover of this guide.

Step 18

Remove all of the top lift’s guardrail components including any clip-on posts, followed by any ‘topped-out’ standards.

Step 13

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LOADING

In accordance with the requirements of BS EN 12811, the design load for the TRADSTAIR Tower is 1 kN/m2, or 1.5 kN positioned in worst-case position for element of tower under inspection. Throughout the calculations for the maximum design load on any standard for the TRADSTAIR Tower has been taken as 44.4 kN where the long (3m) face is parallel to the structure and 26.6 kN where the short (1.6m) face is parallel

to the structure, which is based upon the use of ledger beams to both long and short faces of the tower at every landing location. In the case of the 1.6 m single tube ledger being used on the short face, the maximum design load on any standard has been taken as 31.4 kN where the long (3m) face is parallel to the structure and 26.6 kN where the short (1.6m) face is parallel to the structure,

Load Data1

The foundations for a TRADSTAIR tower scaffold should be adequate to carry and disperse the loads imposed, both locally at each standard and, in general, to carry the whole weight of the tower. The responsibility for the adequacy of the foundations should be established and approved prior to erection.

The client for the tower and / or the contractor may need to be consulted. The foundation for a tower should be maintained in an adequate condition during the life of the tower. Regular inspection procedures must be completed in line with current legislation and the use of the tower should be suspended if there is found to be any loss of support.

Loads Imposed Upon the Foundations of a TRADSTAIR Tower2

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All towers will impose forces upon the structure they are fixed to, through their ties. An assessment should be initially made regarding the ability of the structure they are fixed to, either globally, due to its own instability, or locally, as a result of defective finishes.

Loadings from the ties into the supporting structure are dependent upon the live loading to the working platforms, the height of the tower, the wind loading imposed upon the tower, and the cladding status of the tower. Where ties cannot be positioned in the correct pattern, qualified design input must be sought.

Forces Upon the Supporting Structure From Ties1

Appropriate continuous lengths of tube should be fitted to the inside and outside standards of the TRADSTAIR structure.

The positioning of the tie axis must be within 300mm of the node point, although within 150mm is considered good practice.

Standard BS EN 39 tube and BS EN 74 right angle fittings are be used to form the tie connection in conjunction with a proprietary tie system (Figs. 43 & 44).

Note: Where ties cannot be positioned within 300mm of the node point, or where suggested configurations cannot be used, qualified design input must be sought from a competent temporary works / scaffold design engineer, regarding their design and positioning.

Tie Connections2

Fig. 43 Fig. 44

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In addition to masonry anchors; box ties, lip ties, through ties and ties formed with girder couplers may also be used to ensure the stability of the TRADSTAIR system (Figs. 45 to 48).

Note: Further guidance on tying and types of ties can be found in the latest editions of the NASC guidance notes TG4 – “Anchorage systems for scaffolding” & TG20 – “A comprehensive guide to good practice for tube and fitting scaffolding.”

Note: A minimum of three ties must be tested and at least 5% (1 in 20) thereafter. These should be chosen at random and spread evenly throughout the structure.

Fig. 45

Fig. 47 Fig. 48

Fig. 46

The tower should be tied to the supporting structure at each lift (i.e. 2.0m maximum vertical centres) using horizontal ties at each side, which are securely fixed to the existing structure and to both the inner and outer standards.

Where the shorter 1.6m face of the tower is constructed parallel to the existing structure,

additional ties are required. These ties should be applied at each lift from the outer standards at 45 degrees back to the existing structure. These additional ties are to be securely fixed to the existing structure and this fixing is assumed to be capable of resisting horizontal forces both parallel and perpendicular to the plane of the supporting structure.

Tie Patterns3

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SAFE WORKING HEIGHTS

The TRADSTAIR tower safe height tables are based on a maximum height of 30m, heights above this are possible but these should be referred to a competent temporary works engineer.

The TRADSTAIR tower safe height tables are based on:

Tie patterns being adhered to at all times.

Maximum 2.0m lift heights.

The utilisation of wind loading in the preparation of its safe working height tables. These tables are limited to “SWIND” values above 20m/s and below 40m/s. Localised conditions may result in “SWIND” values outside of these parameters, the wind velocity pressures may either be lower than, or exceed those utilised within the calculations from which the tables are derived. Towers located to the edges of cliffs or escarpments, in coastal locations or fixed to tall structures surrounded by other tall structures (which may cause funnelling of the wind pressure), are all susceptible to significant increases in wind pressure due to local effects. In all these instances it is recommended that advice is sought from a competent temporary works / scaffold design engineer.

For the purposes of this guide the TRADSTAIR tower is assumed to be unclad and free from netting and sheeting, such that the only area presented to the wind is that of the components of the tower.

The safe height tables and section capacities contained within this TRADSTAIR User Guide are based upon live loading from the intended use only. Additional loading may accrue on the platforms or components as a consequence of atmospheric precipitations such as ice, snow, sand and dust. The working processes may also cause debris such as sand, grit or demolition debris to accumulate on the platforms or components, which will also increase the live loading above that allowed for. Where this is seen to occur or is known will occur further guidance should be sought from a competent temporary works engineer, which may result in a downgrading of the load class of the tower.

Any site that falls outside of the scope of the ‘Town’ site description.

Country Sites

Any site that is at least 2km upwind inside a town or woodland terrain, shielded by buildings or permanent obstructions within 100m and where the average height of the surrounding buildings are 5m or more then this site is classified as a ‘Town’ site, which includes ‘Town in Woodland’ sites.

Town Sites

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3.05m (Long) Face Parallel to the Building1

1.65m (Short) Face Parallel to the Building2

SWIND (m/s)Value to be ascertained

subject to site

Maximum Tower Height (m)

Country Town

20 30 30

24 30 30

28 28 30

32 14 16

36 6 8

40 - 4

Derived from Out of Service Condition — In Service acceptable up to 30m


subject to site


Country Town

20 30 30

24 30 30

28 30 30

32 30 30

36 30 30

40 30 30


1.65m LEDGER BEAM TO SHORT FACES

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3.05m (Long) Face Parallel to the Building1

1.65m (Short) Face Parallel to the Building2


subject to site


Country Town

20 30 30

24 30 30

28 24 24

32 12 14

36 6 8

40 - 4



subject to site


Country Town

20 30 30

24 30 30

28 30 30

32 30 30

36 30 30

40 30 30


1.65m SINGLE TUBE LEDGER TO SHORT FACES

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PERSONNEL CAPACITIES

The Personnel Capacities tables are designed to provide guidance on the recommended number of personnel permitted on the TRAD Stair Tower by the height of the tower.

For the purposes of this table one person is assumed to weigh 100kg, exerting a force of approximately 1kN and allows for gravity loads only, no wind or lateral loadings are taken into account.

TRADSTAIR Tower Height (m)

Max No. Personnel (Long Face Parallel to Building)

Max No. Personnel (Short Face Parallel to Building)

Ledger Beams Single Tube Ledger Ledger Beams Single Tube Ledger

2

4

6

8 22 22 22 22

10 27 27 27 27

12 32 32 32 32

14 37 37 37 37

16 42 42 42 42

18 47 47 47 47

20 52 52 52 52

22 57 57 57 57

24 62 62 62 62

26 67 67 67 67

28 72 72 71 71

30 77 77 69 69

32 81 81 67 67

34 86 84 65 65

36 91 81 62 62

38 96 79 60 60

40 101 77 57 57

42 106 75 55 55

44 111 72 53 53

46 116 70 51 51

48 119 67 48 48

50 117 65 46 46

Note: The table is limited to a maximum area load of 2kN/m2 (2 Persons per m2) for practical reasons.

35


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OTHER PRODUCTS

PLETTAC METRIX1

PLETTAC METRIX is a revolutionary rosette system with some significant advantages over other ring based systems, such as its unique divisibility of horizontal components. This concept allows the use of extra vertical members within the bay length or width, for ease of adaptability.

PLETTAC METRIX also has an optional Permanent Advanced Guardrail which is installed from the safety of the lift below. The guardrail gives collective protection rather than personal, complying fully with SG4 and Work at Height regulations.

ALTRIX Temporary Roof System2

ALTRIX is an all aluminium modular temporary roofing and weather protection system, which utilises the slide sheet keder model.

ALTRIX is more than just a roof. The chords and vertical posts of the beams are manufactured from 48.3mm diameter alloy tube making them suitable for use in many normal scaffold applications.

With 3.0m, 2.5m, 2.0m and 1.5m bay sizes ALTRIX is designed to work particularly efficiently with PLETTAC METRIX, although it is not limited to this application. ALTRIX can be used with almost any scaffold type.

PLETTAC METRIX®

USER GUIDE

FOCUSSED ON SERVICE


ALTRIX® TEMPORARY ROOFING SYSTEM

USER GUIDE

FOCUSSED ON SERVICE


36


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TRADLOK is a scaffold system which utilises a locking device that is formed by a captive bottom cup welded to the standards at 500 mm intervals. Ledgers, transoms and associated items have blade ends, which are located into the captive bottom cup. A top cup is then rotated down and locked into place with a hammer blow, giving a rigid and secure connection.

TRADLOK can be used with three types of platform, either standard 38 mm thick scaffold boards, 63 mm thick timber battens or 65 mm thick steel battens.

TRAD Sheeting and Debris Netting is a cost effective and versatile temporary containment and weather protection solution.

TRAD Sheeting is manufactured from clear low-density polythene, reinforced with high-density polythene yarn.

TRAD Debris Netting is manufactured from high-density polythene monofilaments that have been UV stabilised.

TRADLOK System Scaffold3

Scaffold Sheeting and Netting4

Tools & Tool Holders5 Harnesses & Lanyards6

TRADLOK USER GUIDE

FOCUSSED ON SERVICE


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Scaffold Fittings BS EN 748

Post Pallets10

Tags & Signs12

Galvanised Tubes BS EN 397

Alloy Beams11

Steel Bins9

38

Edition 2, April 2020

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o.uk

Glasgow DepotTRAD Hire & Sales LtdTRAD Wharf244 Bernard StreetGlasgow G40 3NX

Tel: 0141 550 3666

Leeds DepotTRAD Hire & Sales LtdTRAD House, Unit 1b 16 Cross Green Way Cross Green Industrial Estate, Leeds LS9 0SE

Tel: 0113 249 9555

London DepotTRAD Hire & Sales LtdRenwick RoadBarkingEssex IG11 0SB

Tel: 020 8517 1212

Birmingham DepotTRAD Hire & Sales LtdTRAD HouseBrickhouse Lane West Bromwich West Midlands B70 0DY

Tel: 0121 522 2333

Stockport DepotTRAD Hire & Sales LtdTRAD HouseCromwell RoadBredburyStockport SK6 2RF

Tel: 0161 430 4666

Andover Depot TRAD Hire & Sales Ltd58 Whittle Road West Portway Industrial Estate Andover, Hampshire SP10 3FB

Tel: 01264 350 505

Registered Office: 1 Elmfield Park, Bromley, Kent, BR1 1LU | Registered in England No. 3491083 | Tel. +44 (0)20 8980 1155

CONTACT US:

0845 899 0845 / [email protected]

User guide created by Alan Slater

user guide tradstair - trad hire and sales...safety on site as is the case with any scaffold, only...

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