Mich. Admin. Code R. 408.10575b - Two- and 4-point suspended working platforms
Rule 575b.
(1)
The 2- and 4-point suspended working platform shall be not less than 24 inches
(610 mm) wide and shall be provided with a minimum of a 12-inch (305 mm) wide
passage at or past any obstruction on the platform.
(2) The flooring of the 2- and 4-point
suspended working platform shall be of a slip-resistant type and shall not have
an opening that would allow the passage of lifelines, cables, and other
potential falling objects.
(3) The
2- and 4-point suspended working platform shall be provided with a means of
suspension that will restrict the platform from tilting more than 15 degrees in
any direction.
(4) Any cable that
is suspended from above the 2- and 4-point suspended working platform shall be
provided with a means for storage to prevent accumulation of the cable on the
floor of the platform.
(5) All
operating controls for the vertical travel of the 2- and 4-point suspended
working platform shall be of the continuous-pressure type and shall be located
on the platform.
(6) Each operating
station of every 2- and 4-point suspended working platform shall be provided
with a means of interrupting the power supply to all hoist motors to stop any
further powered ascent or descent of the platform.
(7) The maximum rated speed of the 2- and
4-point suspended working platform shall not be more than 50 feet per minute
(0.3 ms) for single-speed hoists and not more than 75 feet per minute (0.4 ms)
for multispeed hoists.
(8) All
tools, water tanks, and other accessories shall be secured to prevent their
movement or accumulation on the floor of the 2- and 4-point suspended working
platform.
(9) Portable fire
extinguishers that are in compliance with the provisions of General Industry
Safety Standard Part 8 "Portable Fire Extinguishers," as referenced in
R
408.10509, shall be provided and securely attached on
all 2- and 4-point suspended working platforms.
(10) Access to and egress from a 2- and
4-point suspended working platform, except for those that land directly on a
safe surface, shall be provided by stairs, ladders, platforms, and runways that
are in compliance with the provisions of General Industry Safety and Health
Standard Part 2 "Walking-Working Surfaces," as referenced in
R
408.10509. Access gates shall be self-closing and
self-latching.
(11) Means of access
to or egress from a working platform that is 48 inches (1.2 m) or more above a
safe surface shall be provided with a guardrail system or ladder-handrails that
are in compliance with the provisions of General Industry Safety and Health
Standard Part 2 "Walking-Working Surfaces," as referenced in
R
408.10509.
(12) The 2- and 4-point suspended working
platform shall be provided with a secondary wire rope suspension system if the
platform has overhead structures that restrict the emergency egress of
employees. A horizontal lifeline or a direct connection anchorage shall be
provided as part of a personal fall arrest system. The system shall be in
compliance for each employee on such a platform with the requirements of
General Industry Safety and Health Standard Part 33 "Personal Protective
Equipment" as referenced in
R
408.10509.
(13) A vertical lifeline shall be provided as
part of a personal fall arrest system. The system shall be in compliance with
the requirements of General Industry Safety and Health Standard Part 33
"Personal Protective Equipment," as referenced in
R
408.10509, for each employee on a working platform
that is suspended by 2 or more wire ropes, if the failure of 1 wire rope or
suspension attachment will cause the platform to upset. If a secondary wire
rope suspension is used, vertical lifelines are not required for the personal
fall arrest system, provided that each employee is attached to a horizontal
lifeline anchored to the platform.
Notes
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