At the upper end the shank shall not be held in position or restrained in direction. All castors shall be clearly marked with the safe working load they are designed to withstand. Such load shall be vertically applied on the castors when stationary on an even and level surface. The shank or socket of all castors shall be not less than 50 mm long, provided the design allows for an adequate transfer of the load from the tube to the shank.
Means shall be provided to prevent the castor unit falling out of the tube when its wheel is not under load. The diameter of castor wheels shall be not less than mm. When tyres are fitted they shall be of adequate section and securely fixed to the wheel centres. The eccentricity of the centreline of the wheel relative to the axis of swivel shall not exceed 64 mm.
When requested by the purchaser castors shall be provided with an effective wheel brake that cannot be accidentally released. When in position they shall not project sufficiently from the surface of the board to cause a person to trip.
NOTE 1 For normal purposes aluminium requires no painting or other surface treatment. Care should be taken, however, to avoid prolonged contact with materials such as damp lime or wet cement, unless a suitable protective paint is applied.
NOTE 2 If fittings are stamped with a metal die the stamping should be carried out in such a manner as not to impair the efficiency of the fitting. BS , Specification for black bolts, screws and nuts, hexagon and square, with B.
W threads, and partly machined bolts, screws and nuts, hexagon and square, with B. BS , Specification for wrought steels for mechanical and allied engineering purposes.
BS , Metal scaffolding. BS , Tubes. BS BS , Couplers. BS , Steel plate, sheet and strip. BS , Specification for grey iron castings. BS , Specification for wrought aluminium and aluminium alloys for general engineering purposes forging stock and forging. BS , Specification for wrought aluminium and aluminium alloys for general engineering purposes rivet, bolt and screw stock.
BS , Specification for aluminium and aluminium alloy ingots and castings for general engineering purposes. BS , Specification for steel castings for general engineering purposes. BS , Specification for weldable structural steels. BS , Code of practice for access and working scaffolds and special scaffold structures in steel. BS , Code of practice for falsework. BS , Specification for malleable cast iron. CP , The structural use of aluminium.
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Ram K Yadav. Mochamad Ilham Putraditama. Anonymous BzGb2fnfE. Jake Cruz. Sayed Darwish. Hari Haran. Advanced Media Technologies. Dt Namdinh. This projection shall provide an even bearing surface for the end of any tube which has been cut cleanly and squarely and which otherwise complies with BS The bearing surface shall not, under normal loading, tend to bulge or otherwise distort the end of any tube with which it is in contact.
Each spigot of a joint pin shall extend not less than 76 mm on the internal surface of any tube which complies with this standard and shall provide an effective bearing area. Each spigot shall be capable of being expanded within a tube with which it is engaged so as to provide an adequate grip between the tube and the joint pin. NOTE Joint pins are not intended for use in positions where they will be subject to bending stresses or axial tension.
It shall have, in every position, a resistance to bending at least equal to that of any tube of the types for use with which the sleeve coupler is intended to be suitable see clause 5. When used in tension, it shall resist, without slipping, an axial load of not less than 6. The means of varying the distance between the surface bearing against the end of a tube and the end of the reveal pin shall enable adjustments of this distance to be made readily, smoothly and with infinite variation within the limits of adjustment of the reveal pin.
The design of the adjustable portion of the reveal pin shall be such that, when under load, the adjustment cannot be altered by the action of the load or by vibration. Test for deflection and slip. A steel tube 1. Timber or other suitable packing material may be used against the faces of the abutments. A load of 2. The deflection under load with the reveal pin extended to within 25 mm of its full working length shall not exceed twice the deflection under the same load with the reveal pin closed to within 25 mm of its minimum length.
During the test no slip shall occur between the tube or reveal pin and the abutment faces. No permanent set, distortion, or other damage shall occur which would render the tube or reveal pin unserviceable for further use in scaffolding. See also note 1 to clause A fitting, other than a putlog coupler, provided for connecting a putlog to a tube shall comply with clause 11 for putlog couplers.
Detachable putlog ends shall be provided with means of securing them to the putlog without risk of being accidentally disconnected. A putlog end, when attached to or forming part of a putlog and supported only within 38 mm of its extremity, as shown in Figure 6, shall be capable of supporting without permanent set, a maximum distributed load of 4.
NOTE 1 As aluminium scaffold tube is heat-treated, heat should not be applied to them by welding, flame-cutting, etc.
NOTE 2 Where aluminium scaffold tubes are required to be flattened at one end to form putlog ends this work should be carried out before the tubes are subjected to their final treatment. It is recommended that putlogs with flattened ends be obtained ready-made from the tube manufacturers, except where adequate heat-treatment facilities are available. The upper surface of the plate shall provide a smooth and even bearing for the end of a tube satisfying the requirements of this standard and be such as not to damage or distort the tube under load.
The shank shall be not less than 50 mm long, and shall be a loose fit to allow the insertion of the full depth of the shank inside the tube. A base-plate, if of low carbon steel, shall be not less than 4. If of other steels they shall have a thickness sufficient to provide an equal strength. Aluminium base-plates shall be not less than 6. The eccentricity of the centreline of the wheel relative to the axis of swivel shall not exceed 64 mm. When requested by the purchaser castors shall be provided with an effective wheel brake that cannot be accidentally released.
When extended to its maximum working position the shank shall be capable of supporting a load of In applying this test the base-plate shall be placed on a smooth horizontal surface and the load applied through the seating on which the scaffold tube normally rests.
At the upper end the shank shall not be held in position or restrained in direction. Toe board clips shall be suitably designed and constructed for the attachment of toe boards to tubular members and shall prevent accidental displacement of the boards. When in position they shall not project sufficiently from the surface of the board to cause a person to trip.
All castors shall be clearly marked with the safe working load they are designed to withstand. Such load shall be vertically applied on the castors when stationary on an even and level surface. The shank or socket of all castors shall be not less than 50 mm long, provided the design allows for an adequate transfer of the load from the tube to the shank.
Means shall be provided to prevent the castor unit falling out of the tube when its wheel is not under load. The diameter of castor wheels shall be not less than mm.
When tyres are fitted they shall be of adequate section and securely fixed to the wheel centres. NOTE 1 For normal purposes aluminium requires no painting or other surface treatment. Care should be taken, however, to avoid prolonged contact with materials such as damp lime or wet cement, unless a suitable protective paint is applied.
NOTE 2 If fittings are stamped with a metal die the stamping should be carried out in such a manner as not to impair the efficiency of the fitting.
BS , Specification for black bolts, screws and nuts, hexagon and square, with B. W threads, and partly machined bolts, screws and nuts, hexagon and square, with B. BS , Specification for wrought steels for mechanical and allied engineering purposes.
BS , Metal scaffolding. BS , Tubes. BS BS , Couplers. BS , Steel plate, sheet and strip. BS , Specification for grey iron castings. BS , Specification for wrought aluminium and aluminium alloys for general engineering purposes — forging stock and forging. BS , Specification for wrought aluminium and aluminium alloys for general engineering purposes — rivet, bolt and screw stock.
BS , Specification for aluminium and aluminium alloy ingots and castings for general engineering purposes. BS , Specification for steel castings for general engineering purposes. BS , Specification for weldable structural steels.
BS , Code of practice for access and working scaffolds and special scaffold structures in steel. BS , Code of practice for falsework. BS , Specification for malleable cast iron. CP , The structural use of aluminium. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.
Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services.
We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel:
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