Mich. Admin. Code R. 408.10675 - Swinging stairs
Rule 675.
(1)
A swinging stair section shall not be used for a fire escape stairs, except
where termination is over a sidewalk, alley, or driveway.
(2) A swinging stair section shall not be
located over doors, over the path of travel from another exit, nor be in any
location where there are obstructions.
(3) The width of a swinging stair section
shall be at least equal to that of the stairs above and the pitch shall not be
steeper than that of the stairs above.
(4) A counterweight shall be provided for a
swinging stair section and this shall be of the type balancing about a pivot,
no cables being used. Counter-balancing shall be such that a weight of 150
pounds 1 step from pivot will not start swinging section, and a weight of 150
pounds, 1/4 of the length of the swinging stairs from the pivot, will
positively cause the stairs to swing down.
(5) A latch or other device shall not be
installed or used to lock a swinging stair section in the up
position.
Notes
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