Section 400.4640. Stairs.

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(1) In new and converted facilities, stairs shall have treads of uniform width and risers of uniform heights. In converted facilities, treads shall be not less than 9 1/2 inches deep, exclusive of nosing, and risers shall be not more than 7 ¾ inches in height. In newly constructed facilities, treads shall be not less than 11 inches deep, exclusive of nosing, and risers shall be not more than 7 inches in height.

(2) Stairs in an existing facility approved before these rules take effect shall continue to be approved until the portion of the building encompassing the stairs is remodeled.

History: 1983 AACS; 2015 AACS.

                    
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