142.2 (1) A multi-point suspended work platform and all its components shall be designed by an engineer in accordance with good engineering practice and with this section. O. Reg. 85/04, s. 15; O. Reg. 242/16, s. 1 (1); O. Reg. 375/22, s. 5. (2) A multi-point suspended work platform shall be designed to support, in addition to its dead load, live loads uniformly distributed over the platform surface of at least, (a) 2.4 kilonewtons per square metre if the platform is to be used for masonry work; (b) 3.6 kilonewtons per square metre if the platform is to be used for demolition work or for storage of masonry units or other related material or equipment; or (c) 1.2 kilonewtons per square metre in any other case. O. Reg. 85/04, s. 15; O. Reg. 242/16, s. 1 (1). (3) In addition to the loads specified in subsection (2), a multi-point suspended work platform shall be able to support or resist, (a) 1.1 kilonewtons concentrated on an area measuring 0.3 metres by 0.3 metres that is located on the platform at the position having the most adverse effect on the component under consideration; (b) the wind load determined in accordance with the applicable provisions of the Building Code, based on a one in ten probability of being exceeded in any one year; and (c) any other loads likely to be applied to it. O. Reg. 85/04, s. 15; O. Reg. 242/16, s. 1 (1); O. Reg. 142/17, s. 19 (1). (4) The wind load referred to in clause (3) (b) may be reduced by 30 per cent if the engineer who designs the multi-point suspended work platform determines that it is appropriate to do so and indicates in writing that he or she has made the determination. O. Reg. 85/04, s. 15; O. Reg. 242/16, s. 12 (1); O. Reg. 375/22, s. 5. (5) Subject to clause (2) (c) and subsections (3) and (4), the engineer who designs the multi-point suspended work platform shall determine the minimum specified loads for erecting, dismantling, traversing or otherwise moving the multi-point suspended work platform. O. Reg. 242/16, s. 12 (2); O. Reg. 375/22, s. 5.¶ (6) If a multi-point suspended work platform is to be used for abrasive blasting operations, there shall be an additional load allowance for the accumulation of grit on the platform to a depth of at least 25 millimetres. O. Reg. 85/04, s. 15; O. Reg. 242/16, s. 1 (1). (7) Subject to subsection (8), in designing a multi-point suspended work platform and its structural members, the following values of load factors, as described in the applicable provisions of the Building Code related to Limit States Design, shall be applied to the load requirements referred to in subsections (2) to (6): 1. Live load factor = 3.0. 2. Dead load factor = 1.5. 3. Wind load factor = 1.5. O. Reg. 142/17, s. 19 (2). (8) In designing the suspension and anchorage system of a multi-point suspended work platform, (a) the value of the live load factor shall be 4.0; (b) the value of the dead load factor shall be 2.0; and (c) the value of the wind load factor shall be 2.0. O. Reg. 85/04, s. 15; O. Reg. 242/16, s. 1 (1); O. Reg. 142/17, s. 19 (3). (9) Despite subsections (7) and (8), a multi-point suspended work platform and its components may be designed by working stress design if the safety factors for the multi-point suspended work platform and the structural members are at least equal to what would otherwise be provided under those subsections. O. Reg. 85/04, s. 15; O. Reg. 242/16, s. 1 (1), 12 (3). (10) Despite subsections (7) and (8), if the failure load of a component has been determined by testing, the minimum safety factors shall be, (a) 3.0 for components of the multi-point suspended work platform; (b) 4.0 for components of the suspension and anchorage system; and (c) 10.0 for wire ropes, cables or chains used for hoisting, traversing or otherwise moving the multi-point suspended work platform. O. Reg. 85/04, s. 15; O. Reg. 242/16, s. 1 (1). (11) The failure load of a component referred to in subsection (10) shall be verified in writing by an engineer. O. Reg. 85/04, s. 15; O. Reg. 375/22, s. 5. (12) A multi-point suspended work platform shall be designed, constructed and maintained in such a way that, (a) the failure of one means of support or suspension will not cause any part of the platform to collapse or fail, under the most adverse loading condition as determined by the engineer who designs the multi-point suspended work platform; and¶ (b) compliance with subsections (7), (8), (9) and (10) is maintained in all fixed and moving conditions. O. Reg. 85/04, s. 15; O. Reg. 242/16, s. 1 (1), 12 (4); O. Reg. 375/22, s. 5. (13) The design of a multi-point suspended work platform shall include adequate movement-limiting devices to be used when traversing or otherwise moving it. O. Reg. 85/04, s. 15; O. Reg. 242/16, s. 1 (1). (14) Before a multi-point suspended work platform is erected, the constructor shall ensure that the engineer responsible for the structural integrity of the permanent building or structure from which the multi-point suspended work platform is suspended provides a written report approving the design loads imposed on the building or structure by the multi-point suspended work platform. O. Reg. 85/04, s. 15; O. Reg. 242/16, s. 1 (1), 12 (5); O. Reg. 375/22, s. 5. (15) Design drawings for a multi-point suspended work platform shall include, (a) a statement by the engineer that the design meets the requirements of this Regulation; (b) the size and specifications of all components, including the type and grade of all materials to be used; (c) the load factors and safety factors for the multi-point suspended work platform and all its components; (d) all the specified loads, including the loads during erection, dismantling, traversing and otherwise moving; and (e) the procedures for erection, dismantling, traversing and otherwise moving. O. Reg. 85/04, s. 15; O. Reg. 242/16, s. 1 (1), 12 (5); O. Reg. 375/22, s. 5. (16) The design drawings shall be followed, subject to subsection (17). O. Reg. 85/04, s. 15. (17) A deviation from the design drawings is permitted if the deviation, (a) is approved, in advance and in writing, by an engineer; and (b) complies with this Regulation. O. Reg. 85/04, s. 15; O. Reg. 375/22, s. 5.