Michigan Administrative Code › Department - Labor and Economic Opportunity › MIOSHA › General Industry and Construction Safety and Occupational Health Standards › Occupational Health Standards › Part 12 - SCAFFOLDS AND SCAFFOLD PLATFORMS › MOBILE SCAFFOLDS › Section R. 408.41241 - Mobile scaffolds

Current through Vol. 24-12, July 15, 2024
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.