BS 5973 SCAFFOLDING PDF
BS Code of practice for access and working scaffolds and special scaffold structures in steel Covers scaffolds and temporary structures such as. Documents Similar To BS BS Metal Scaffolding Part 2-Sec Uploaded by. tv-loc. Scaffolding Load Design. Uploaded by. onin Covers scaffolds and temporary structures such as spectator stands and temporary roofs. Reflects CEN published documents for tube and fittings. Document.
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It should also be fitted with steadying wires beneath the net to resist wind uplift. Where the untied facade is longer than 10 m, additional plan bracing should be fixed across the scacfolding length of the untied structure at intervals of height of not more than 8.
Where the building surface permits a staggered arrangement of scaffllding, this should be adopted in preference to a rectangular pattern. When in use in exposed situations, the tower should be tied to the building it is serving. At the lower end it is preferable to butt the decking into a concrete starter ramp.
Thus though the reference level is lower, no change in safe working load is proposed. For seating stands, the seats may be separate or in bench form and the space allocation per seat should be determined.
Both ends of the beams should be stabilized against movement. Provided that the couplers have equivalent strength to the couplers they replace, a direct substitution may be made. Towers outside are usually exposed and are therefore subject to wind forces.
If used in such conditions, tubes should be thoroughly cleaned afterwards, carefully inspected, e. Unprotected steel tube should generally not be used in water and particularly not in marine structures. Gin wheel ropes should be of the correct size to suit the gin wheel usually 18 mm and should comply with the requirements of the appropriate British Standard and be marked with an identification tag and the safe working load. Corrugated sheeting should be attached with sheeting hooks or hook bolts.
Amongst others, the following requirements, current at the date of publication of this code, relate to access and working scaffolds and special scaffold structures in steel: Diagonal vertical plane bracing of alternate boxes in two directions should be fixed.
Ledger bracing from the inside ledger to the guardrail level of the lift below may be used provided that every pair of standards is so braced instead of every alternate pair. The wheels should be fitted with brakes, which should be on during use. The putlog opposite to the window is fixed to this. However, when guardrails are to remain permanently in place, the absence of a joint in the guardrail in any bay may be accepted as giving sufficient continuity to the scaffold to permit joints in the ledgers above and below it in the same bay.
When in use in exposed situations, the tower should be tied to the building it is serving. Where persons are carried, an efficient interlocking or safety device should be fitted to every gate to ensure that the gate can only be opened when the cage is at that landing level and also that it should be closed before the cage can move from that landing level.
Steel banding of equivalent strength may also be used.
HSM – BS to be officially withdrawn in
scaffoldung Damaged or suspect sections should be cut off and destroyed. Boards which are nominally 38 mm thick and less than 2.
Provided that the couplers have equivalent strength to the couplers they replace, a direct substitution may be made. The recommended safety factor for guy ropes is 3: Some of the special requirements which should be taken into consideration in design are given in Scafrolding may be joined by the same type of couplers used for longitudinal bracing and the scaffoldint rules with regard to strength apply.
In other cases the value of 2. The scaffold, especially its tying and bracing, should be inspected prior to dismantling. External birdcages should be braced to resist wind forces and anchored when necessary. General 1 Scope This code of practice gives recommendations and includes some guidance for the design, construction and use of common scaffolds in steel, normally scaffoldinf in construction, maintenance, repair, and demolition work, excepting those for the support of permanent work, commonly referred to as temporary works or falsework, and suspended scaffolds.
Table 1 gives maximum bay lengths of scaffolds with single standards see Figure 1 and Figure 2.
Children pose a special problem; many have been injured either through falling or causing the scaffold to collapse after climbing up scaffolding, either by the standards or by ladders left at ground level.
If this impedes free access through the scaffold, then it is permissible for them to be fixed to the inside standard. In some cases it may be possible to butt against walls on opposite sides.
Figure 19 — Anchors Li ce ns ed C op y: The absence of the braced upper lifts requires that the lateral stability of the deck is derived from one lift of bracing sscaffolding, which should therefore be correctly positioned and fixed. Figure 7 — Reveal tie Li ce ns ed C op y: Boards should be laid and secured by wire, nails, or board clips. Board end transoms should be fixed so that the end overhang of a board does not scatfolding that given in Table 3.
Any free standing hoist tower or one which scacfolding higher than 50 m should be specially designed, braced, tied and anchored as 59773 by the hoist manufacturers. Some cast-in and drilled anchors do not have the standard scaffollding of 6. A cantilever scaffold should always have foot ties in both directions.
Their accuracy will be better and construction less difficult for all straightforward applications. Timber fenders should be provided at the edge and down the middle of the decking, as necessary, to restrain the traffic to fixed lanes so that the location of the applied loads is known. Toeboards, guardrails and mesh screens should be provided on pedestrian lanes.
Warning notices should be fixed to draw scaffoldinb to those parts of a scaffold which are incomplete and should not be used. When the ground is sloping, the sole plates should be dug in flat.
Defective parts and components with sdaffolding welds should be discarded. In either case the gin wheel fixing to the tube should be prevented from slipping towards or from the building by one fitting mounted on either side of the fixing. In Figure 18, the truss-out should be capable of resisting any disortion due to the the vertical reactions and the lateral inward and outward forces.