Mich. Admin. Code R. 408.10575a - Suspended equipment
Rule 575a.
(1)
Each suspended unit component, except for suspension ropes and guardrail
systems, shall be capable of supporting not less than 4 times the maximum
intended live load applied or transmitted to that component.
(2) Each suspended unit component shall be
constructed of materials that will withstand anticipated weather
conditions.
(3) Each suspended unit
shall be provided with a load rating plate that is conspicuously located and
that states the unit weight and rated load of the suspended unit.
(4) When the suspension points on a suspended
unit are not at the unit ends, the unit shall be capable of remaining
continuously stable under all conditions of use and position of the live load
and shall maintain not less than a 1.5 to 1 stability factor against unit
upset.
(5) Guide rollers, guide
shoes, or building face rollers shall be provided and shall compensate for
variations in building dimensions and for minor horizontal out-of-level
variations of each suspended unit.
(6) Each working platform of a suspended unit
shall be secured to the building facade by 1 or more of the following methods
or by an equivalent method that is in compliance with the provisions of
R
408.10561 and
R
408.10562:
(a)
Continuous.
(b)
Intermittent.
(c) Button guide
engagement.
(d) Angulated
roping.
(e) Building face
rollers.
(7) Each
working platform of a suspended unit shall be provided with a guardrail system
on all sides, which shall meet the requirements of General Industry Safety and
Health Standard Part 2 "Walking-Working Surfaces," as referenced in
R
408.10509. All of the following provisions apply to
the guardrail system:
(a) The system shall
consist of a top guardrail, midrail, and toeboard.
(b) The top guardrail shall be not less than
42 inches high and shall be able to withstand not less than a 200-pound force
in any downward or outward direction.
(c) The midrail shall be able to withstand
not less than a 75-pound (333 n) force in any direction.
(d) The areas between the guardrail and
toeboard on the ends and outboard side, and the area between the midrail and
toeboard on the inboard side, shall be closed with a material that is capable
of withstanding a load of 100 pounds (45.4 kg.) applied horizontally over any
area of 1 square foot (.09 m2). All openings in the
material shall be small enough to prevent the passage of lifelines and
potential falling objects that may be hazardous to persons below.
(e) Toeboards shall be capable of
withstanding a force of not less than 50 pounds (222 n) applied in any
direction at any point along the toeboard.
(f) Toeboards shall be not less than 4 inches
in height from the top edge to the level of the platform floor.
(g) Toeboards shall be securely fastened in
place at the outermost edge of the platform and have not more than 1/4 of an
inch (1.3 cm) clearance above the platform.
(h) Toeboards shall be solid or have an
opening that is not more than 1 inch (2.5 cm) in the greatest
dimension.
Notes
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