This Stream includes all of our Guides & Toolkits Flipbooks.
Issue link: https://www.wsps.ca/resource-hub/i/1317310
JUNE 2013 126. (1) Every scaffold shall be designed and constructed to support or resist, (a) two times the maximum load or force to which it is likely to be subjected, without exceeding the allowable unit stresses for the materials of which it is made; and (b) four times the maximum load or force to which it is likely to be subjected without overturning. (2) Despite clause (1) (a), a scaffold with structural components whose capacity can only be determined by testing shall be designed and constructed to support or resist three times the maximum load or force to which it is likely to be subjected without causing the failure of any component. (3) No scaffold shall be loaded in excess of the load that it is designed and constructed to bear. 128. (1) Every scaffold, (a) shall have uprights braced diagonally in the horizontal and vertical planes to prevent lateral movement; (b) shall have horizontal members that are adequately secured to prevent lateral movement and that do not have splices between the points of support; (c) shall have footings, sills or supports that are sound, rigid and capable of supporting at least two times the maximum load to which the scaffold may be subjected without settlement or deformation that may affect the stability of the scaffold; (d) shall have all fi ttings and gear, including base plates or wheels, installed in accordance with the manufacturer's instructions; (e) shall have connecting devices between frames that provide positive engagement in tension and compression; (f) shall have safety catches on all hooks; and (g) shall be adequately secured at vertical intervals not exceeding three times the least lateral dimension of the scaffold, measured at the base, to prevent lateral movement. (2) A scaffold shall be constructed of suitable structural materials and, if lumber is used, it shall be construction grade or Number 1 Grade spruce. (3) A scaffold mounted on pneumatic tires shall not be supported by the pneumatic tires while the scaffold is being erected, used or dismantled. (4) If tubular metal frames are used to support masonry units on a scaffold platform, each frame leg shall have a minimum working load of, (a) twenty-two kilonewtons for standard frames; and (b) 16.7 kilonewtons for walk-through frames. 38