b'CODE OF SAFE PRACTICE GUIDELINESD.Do use double ledgers or equivalent where point loadsI.Ensure all castors are from the same manufacturer,or Uniformly Distributed Loads (UDLs) exceed singleare the same size and diameter and can support ledgercapacities. designatedloads.E.Do use correct bracing sizes to correspond to bay sizes.J.Ensure both horizontal and vertical components areInternal braces must be braced at a minimum of everysecured in place to prevent separation from one another.third bay and extend the full height of scaffold.Do not add side brackets or other platform extensions K. F.without compensating for overturning at base.Do introduce top chord, bottom chord and plan bracing as required, where trusses and large clear spans L.Use outriggers where appropriate to extend arerequired.basedimensions.IV.TUBE AND CLAMP SCAFFOLDM.Install plan bracing at the base and lateral bracing A. Tube and clamp shall be of aluminum or steel tubes thathorizontally and diagonally where levels are not decked. are a min. of 1.9 O.D.N.Ensure all planks/decking are cleated, secured and B.The spacing of tubes acting as vertical standards is prevented from lateral movement and uplift.dependent upon the loading to be imposed on the scaffold. Always check loading requirements and, ifO.Where possible, always provide and use built-in laddersnecessary, seek approved engineered drawings. for platform access.VI.FRAME SCAFFOLD C.Ensure that standards are located securely on base plates and are plumb. Joints in standards should be made with end-to-end or internal spigot clamps, and where possible,Always construct scaffolds on prepared foundations. A. clamps should be staggered so that they do not occur inEnsure footings, sills or supports are capable of the same level.supporting double the anticipated maximum load without settlement. D.Connect the ledgers to the standards with right angleB.Always use adjustable bases and ensure that these are clamps and ensure that they are level. Joints in ledgers should be made with end-to-end clamps only, shouldcentred and spiked to the wood sill. occur as close to the standard as possible and areC. staggered in alternate bays.Frame spacing is dependent upon the loading to be imposed on the scaffold. Always check loading V. ROLLING SCAFFOLD requirements and, if necessary, seek approved engineereddrawings.A.Only use rolling scaffold on suitable ground/hard levelsurfaces. Identify all hazards or obstructions in the travelD.Ensure that each frame is located securely on thepath of the scaffold when moving from one locationadjustable base and that it is level and plumb. Joints in toanother.frames must be made with internal coupling pins, which B.must be secured with locking pins or lock arms.Do not exceed a height-to-base ratio of 3:1 (from smallest base dimension) to prevent overturning. E.Connect frames by cross braces with predeterminedC.lengths to coincide with the frame spacing. Each cross Do not roll scaffold with workers on platforms andbrace should be connected to the frame and must be without sufficient assistance. secured to the frame by a positive connection.D.Do not move scaffold without removing or securing loosematerial on platform. VII.GUIDELINES FOR DISMANTLING A. nspect the entire scaffold to ensure that it has not been E.IDo not push or pull rolling tower from the topmovestructurally altered in any way that would deem it to be only from the base. unsafe. If necessary, make alterations to make it safe and F.Do secure plain stem casters to frames or bases with pins,check that all scaffold ties are in place.or other acceptable means. B.Visually inspect all planks/decking prior to removal andG.ensure that they are not damaged and are safe to use. Do not climb or work on scaffold without locking casters in place when stationary. C. Do not remove any scaffold component without due H.Lock all wheels/casters to prevent wheel rotation andconsideration for the effect on the total scaffold when thatscaffold movement when using scaffold. component is removed. 20THE OFFICIAL PUBLICATION OF THE ACCESS ASSOCIATION OF CANADA'