Mast-Climbing Work Platforms

1.1 General

This Standard applies to mast-climbing work platforms (MCWPs) that are primarily used to provide a working surface for personnel, along with their necessary tools and materials, at elevated work locations.

An MCWP typically includes the following features (see Figures 1 and 2): (a) one or more work platforms; (b) one or more masts that are (i) free-standing or laterally supported above their bases; (ii) of fixed or variable height; (iii) vertical or inclined between 0 and 30° to the vertical; and (iv) vertically supported only at their bottom or top; (c) a chassis that is static or capable of transfer at a work site by self-propulsion or towing; and (d) an elevating mechanism that is manually or power operated. Raising and lowering speeds are limited to a maximum of 0.20 m/s (0.8 ft/s).

1.2 Purpose The purpose of this Standard is to specify minimum design, manufacturing, remanufacturing, rebuilding/reconditioning, testing, performance, inspection, training, maintenance, and safe operation requirements for MCWPs to achieve the following objectives: (a) prevention of personal injuries and accidents; (b) uniformity in ratings; and (c) understanding by manufacturers, dealers, installers, maintenance personnel, operators, owners, and users of their respective responsibilities.

MCWPs are generally intended for use over level surfaces. Normally, they are not insulated for use near electrically energized circuits, nor are they intended to be used in hazardous locations. For aerial platforms intended for use near electrically energized circuits, see CAN/CSA-C225. The operation of MCWPs is subject to certain hazards and therefore needs to be performed by competent, careful personnel trained in the intended use, safe operation, maintenance, and servicing of MCWPs.

1.3 Application The design and manufacturing requirements of this Standard apply to MCWPs manufactured after the date of publication of this Standard.

1.4 Equipment not covered This Standard does not apply to (a) vehicle-mounted aerial devices covered by CAN/CSA-C225; (b) non-self-propelled elevating rolling work platforms covered by CAN/CSA-B354.1; (c) self-propelled elevating work platforms covered by CAN/CSA-B354.2; (d) self-propelled boom-supported elevating work platforms covered by CAN/CSA-B354.4; (e) construction hoists used to raise and lower materials and personnel covered by CAN/CSA-Z185 and CAN/CSA-Z256; (f) mobile cranes covered by CAN/CSA-Z150; (g) vehicle-mounted vertical lift devices covered by ANSI/SIA A92.7; (h) vehicle-mounted bridge inspection and maintenance devices covered by ANSI/SIA A92.8; (i) permanently installed (non-mobile) elevating lifts used to transport personnel between different elevations; and (j) firefighting equipment.