Mich. Admin. Code 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.
Notes
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