Mich. Admin. Code R. 408.10566 - Outriggers
Rule 566.
(1)
Outriggers may be used as a method of suspension for ground-rigged working
platforms where the point of suspension is not more than 300 feet (91.5 m)
above a safe surface. A tie-in guide system or systems shall be provided and
shall be in compliance with the requirements of
R
408.10561 and
R
408.10562.
(2) Outriggers shall be used only with
self-powered, ground-rigged working platforms.
(3) Each outrigger shall be secured with a
tie-down to a verified anchorage on the building during the entire period of
its use. The anchorage shall be designed to have a stability factor of not less
than 4 against overturning or upsetting the outrigger.
(4) Access to and egress from the working
platform shall be from and to a safe surface below the point of
suspension.
(5) Each portable
outrigger shall be designed for lateral stability to prevent rollover if
lateral load is accidentally applied to the outrigger.
The accidental lateral load to be considered in this design system shall be not less than 70% of the rated load of the hoist.
(6) Each portable outrigger shall
be designed to support a load of not less than 4 times the rated load of the
hoist.
(7) Each portable outrigger
shall be located so that the suspension wire ropes for 2-point suspended
working platforms are hung parallel.
(8) A portable outrigger shall be tied back
to a verified anchor on the building with a rope that is equivalent in strength
to the suspension rope.
(9) The
tie-back rope shall be installed parallel to the centerline of the
outrigger.
Notes
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