3.9.24. Winch scaffolding: In addition to the standards prescribed in section 3.9.22, every winch scaffolding shall:(1) be designed and manufactured in compliance with ANSI/SIA Standard A 92.9-1993 Mast-Climbing Work Platforms;
(2) when climbing, have bracing affixed under the work platform before the above bracing is removed;
(3) be equipped with an arresting device to stop and support the platform in case of overspeed; the device must be designed to stop the work platform with twice the maximum load allowed by limiting the height of the fall to 300 mm, without any break in the components under stress;
(4) in addition to the instructions of the manufacturer, be inspected in compliance with the following minimum conditions:(a) before each use in compliance with section 7.4.3 of ANSI/SIA Standard A 92.9-1993 Mast-Climbing Work Platforms by a qualified person; and
(b) quarterly by a qualified mechanic;
(5) undergo every year a visual examination of its welds by a welding inspector holding a certificate issued by the Canadian Welding Bureau or a welding supervisor in the employ of a company certified in compliance with the requirements of CSA Standard W47.1 Certification of Companies for Fusion Welding of Steel; and
(6) undergo every 5 years a non-destructive examination of the bearing parts by an organization certified by the Canadian Welding Bureau in compliance with the requirements of CSA Standard W178.1 Certification of Welding Inspection Organizations.