R 408.41241 Mobile scaffolds.

Rule 1241. (1) When a freestanding mobile scaffold is used, the height shall not be more than 4 times the minimum base dimension. (2) Outriggers, when used, may be considered as part of the base dimension. The outriggers shall be installed on both sides of the scaffold at each frame line. (3) Locking devices shall be used to secure the casters to the frame or adjusting screw. The adjusting screw shall not extend more than 12 inches. The casters shall be provided with a positive locking device to prevent movement of the scaffold. The device shall be used when the scaffold is in use, except where the work platform is 4 feet or less from the floor. (4) Vertical members of the scaffold shall be braced by cross bracing and diagonal bracing. Not less than 2 horizontal diagonal braces shall be installed, 1 as close to the casters as possible, at intervals of not more than 4 times the least-based dimension. The horizontal diagonal brace may be omitted on a scaffold that is specifically designed to absorb racking. (5) A scaffold platform shall cover the full width of the scaffold, except for a necessary entrance opening. A platform shall be secured in place. A platform shall not extend outward beyond the base supports of the scaffold unless outrigger frames or equivalent devices are used to ensure stability. (6) A ladder or stairway that is provided on a manually propelled mobile scaffold shall be affixed or built into the scaffold and shall be so located that, when in use, the ladder or stairway does not have a tendency to tip the scaffold. A landing platform shall be provided at intervals of not more than 30 feet. (7) In place of a ladder or stairway, the requirements of R 408.41211(2) may be complied with. (8) Only manual force shall be used to move a scaffold covered by this rule. The force shall be applied near or as close to the base as practical, except for a scaffold with a work platform that is 4 feet or less from the floor. (9) When being used, a mobile scaffold shall rest upon a suitable footing and shall stand plumb. Where leveling of the scaffold is necessary, screw jacks or an equivalent means shall be used. (10) An employer shall not allow an employee to ride on a mobile scaffold, unless all of the following conditions exist: (a) The floor or surface is within 3 degrees of level and is free from pits, holes, or obstructions. (b) The minimum base dimension of the scaffold when ready for rolling is not less than 1/2 of the height. (c) The casters are equipped with rubber or similar resilient tires. (d) All tools and materials are secured or removed from the platform before the mobile scaffold is moved. (e) The scaffold is equipped with guardrails on all sides. (f) Before a scaffold is moved, each employee on the scaffold is made aware of the move. (11) A mobile scaffold shall be in compliance with the applicable provisions of R 408.41217, R 408.41218, R 408.41223, and 29 CFR 1926.452(c), as adopted by reference in R 408.41201. (12) A power system used to propel a mobile scaffold shall be designed to propel a mobile scaffold. A forklift, truck, similar motor vehicle, or add-on motor shall not be used to propel a scaffold unless the scaffold is designed to be propelled by a forklift, truck, similar motor vehicle, or add-on motor. (13) If a power system is used to propel a scaffold, then the propelling force shall be applied directly to the wheels and shall not produce a speed of more than 1 foot per second (0.3 meters per second). (14) An employee shall not be on any part of a powered mobile scaffold that extends outward beyond the wheels, casters, or other supports. (15) A powered mobile scaffold shall be stabilized to prevent tipping during movement.