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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The tension in guys, especially, if they are maintaining safety nets in position, may rise to a large value and this force will pass into the scaffold structure and down certain of the uprights to the ground as an added scaffoldin which should be taken into account in designing the structure.
Where access for the public is required under the first lift, a height of up to 2.
These gaps should be kept to a minimum and, if possible, to less than 75 mm. NOTE 2 The loads and number of loaded platforms and widths of scaffold from this table have been used in the calculations given in appendix B.
The strength and pull-out capabilities of these elements, which will include rainwater pipes, parapets and other architectural features should be verified before any use is made of them. When these are used, there should be four transoms to each board. Thus though the reference level scaffoldint lower, no change in safe working load is proposed.
When in use in exposed situations, the tower should be tied to the building it is serving. They do not resist inward movement of the scaffold and should be accompanied by an adjacent butting transom or have two cross tubes, nor do they resist sway.
Table 3 — Maximum span of scaffold boards Nominal thickness of board mm Maximum span scafolding transoms m Minimum overhang mm maximum overhang mm 38 50 63 1.
The tower may then be increased in height and should be additionally tied at levels of approximately every 6 m. The decking may be of corrugated sheeting or scaffold boards and it should be fixed securely to the framework.
Where specified horizontal forces are to be resisted in addition to wind forces, the structure should be plan braced so that those forces may be distributed along the length of the structure and subsequently distributed between the guys and anchors.
The inner row is set as close to the building as is practicable. A tie to the facade consists of a tie member, normally a tube, and an anchorage.
The foundation for a scaffold should be maintained in an adequate condition during the life of the scaffold.
Effective steps should be taken to prevent persons being struck by falling objects and again the provision of a protected thoroughfare, suitable brick guards, facade nets, sheeting or fans may be necessary. When the forces in the raker and the ledger bracing in the tower demand it, the necessary check couplers should be installed. The assembly should be placed inside the bore of the reveal tube and the nut adjusted until the reveal tube is expanded into the opening, gripping it with considerable force.
The choice of appropriate ties and their positioning should make this possible.
Thus though the reference level is lower, no change in safe working load is proposed. This arrangement imposes additional loads on the ledgers and standards of the access scaffold. For normal use the recommended sheeting is 22 gauge or 24 gauge thicknesses see Table 8. A fan for arresting the scaffoldnig of persons or like weights, falling about 6 m or the distance of about two building storeys, which should be erected in accordance with BS cf.
The lift heights should be determined to accommodate the thrust in the legs. Guardrails and toeboards should be provided on all working platforms on a scaffold. A limit of application for clause 36, Temporary buildings and temporary roofs, has been identified and for the larger structures specialist advice should be sought. Sleeve couplers or joint pins should not be used for vertical axial joints unless the joint is lapped.
BS5973 to be officially withdrawn in 2010
Cantilever lifting gantries should be avoided if possible. This also applies to any other case when a tie capacity of 6. The wheels should be fitted with brakes, which should be on during use. The appropriate anchorage and tie should be selected from the principal types described in 9. Changes from the edition are indicated by a vertical rule in the margin.
Figure 21 and Figure 22 show examples.
HSM – BS to be officially withdrawn in
Because a typical fan structure has only two support points, the outside one of which sometimes may not be at the extreme outside edge, serious out of balance forces can occur during construction and dismantling. The vertical forces on the building should be taken at the location of the vertical tubes on the pads. It should also be fitted with steadying wires beneath the net to resist wind uplift. This code has been prepared on a broad interpretation of the rules for design and construction, so that they can be applied to the very numerous variations of scaffolds which inevitably occur.