Mich. Admin. Code R. 408.42150 - Guardrail specifications for scaffolding and catch platforms
Rule 2150.
(1)
A guardrail for scaffolding and catch platforms shall consist of a top rail,
intermediate rail, and supporting posts. The top rail shall have a smooth
surface and shall be installed between 38 inches (97 cm) and 45 inches (114 cm)
above the floor, ramp, platform, or runway. When conditions warrant, the height
of the top edge may exceed the 45-inch (114 cm) height, provided the guardrail
system meets all other criteria of this rule. The intermediate rail shall be
located halfway between the top rail and the floor, ramp, platform, or runway.
The top rail shall not overrun the terminal posts unless such a projection does
not constitute a hazard.
(2) A top
rail and its supporting posts shall be constructed of wood that is not less
than 2- by 4-inch nominal size with a 1- by 6-inch or 2- by 4-inch nominal size
intermediate rail. The construction and fastenings shall produce a guardrail
capable of withstanding a 200-pound side thrust applied at the top rail. Other
material may be used if the finished product has the 200-pound capability. A
guardrail that is subject to additional loads shall be constructed of heavier
stock and the supporting post shall be more closely spaced.
(3) Vertical supporting posts shall be placed
not more than 8 feet (2.4 m) apart.
(4) Banding steel shall not be used for
guardrail construction.
(5) Welded
re-steel members shall not be used for guardrail construction.
Notes
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