139.1 (1) Every supplier of and every employer who owns or uses a work platform shall ensure that the testing requirements in this section are met. O. Reg. 242/16, s. 11. (2) For the purposes of this section, the types of structural components of a work platform are categorized in the following groups: 1. Group 1, which is composed of trusses, corner or angled sections and platform modules. 2. Group 2, which is composed of stirrups, module connectors and end frames. O. Reg. 242/16, s. 11. (3) At least annually, a representative sample of each type of structural component shall be randomly selected and subjected to non-destructive testing in accordance with the following: 1. For each type of Group 1 structural component, the representative sample shall be composed of the number set out in Column 2 of the Table to this subsection opposite the total number of that type of component, set out in Column 1, in the supplier’s or employer’s entire inventory or fleet of suspended work platforms. 2. For each type of Group 2 structural component, the representative sample shall be composed of the number set out in Column 3 of the Table to this subsection opposite the total number of that type of component, set out in Column 1, in the supplier’s or employer’s entire inventory or fleet of suspended work platforms. 3. Every critical weld on each structural component selected as part of the representative sample shall be subjected to non-destructive testing. Table Item   Column 1   Total number of the type of structural component in a supplier or employer’s entire inventory or fleet of suspended work platforms   Column 2   Group 1: number of representative samples of the type of structural component to be tested   Column 3   Group 2: number of representative samples of the type of structural component to be tested  

  1.   2-15   2   2 

  2.   16-50   3   5 

  3.   51-150   5   8 

  4.   151-500   8   13 

  5.   500 or greater   13   20 O. Reg. 242/16, s. 11. (4) If any defect is found as a result of the testing conducted under subsection (3), an engineer shall review the interpretation of the test results to determine, (a) whether the defect affects the structural integrity of the structural component; and (b) if the defect does affect the structural integrity of the structural component, whether the defective component is to be rejected from further use permanently or pending its repair. O. Reg. 242/16, s. 11; O. Reg. 142/17, s. 17 (1); O. Reg. 375/22, s. 5. (5) The engineer shall prepare a written report of the review and determination made under subsection (4). O. Reg. 242/16, s. 11; O. Reg. 375/22, s. 5. (6) If a defective structural component is rejected from further use, either permanently or pending repair, a representative sample that is composed of four times the number of each type of structural component that composed the original representative sample under subsection (3) shall be subjected to testing described in paragraph 3 of subsection (3). O. Reg. 242/16, s. 11. (7) If any defect is found as a result of the testing conducted under subsection (6), subsections (4) to (6) apply, with necessary modifications. O. Reg. 242/16, s. 11; O. Reg. 142/17, s. 17 (2). (8) All other parts of a suspended work platform not listed in subsection (2) shall be inspected for damage at least once within the 12-month period preceding its use on a project and at least once annually while in use on a project. O. Reg. 242/16, s. 11. general requirements: equipment