Section R. 408.10675 - Swinging stairsRule 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.Mich. Admin. Code R. 408.10675
1979 AC; 2015 MR 8, Eff. April 29, 2015