You are viewing an archived code
(a) In institutional and assembly units the maximum height of a riser shall be seven and one-half inches and the minimum width of a tread, exclusive of nosing, shall be ten inches.
(b) In other occupancies the maximum height of a riser shall be eight inches, and the minimum width of a tread, exclusive of nosing, shall be nine inches. The width of a tread, including nosing, shall be not less than ten inches.
(c) The height of two risers plus the width of one tread shall equal not less than 24 inches nor more than 27 inches.
(d) Winders shall not be permitted in stairs required as exits except in single-family and two-family dwellings. The width of a tread of a winder measured at a distance of 18 inches from the inside railing shall be not less than nine inches nor less than the treads of the flight below or above the winding section.
(Prior code § 67-10.1)