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(a) Exit Corridors. Exit corridors in buildings constructed, altered or converted prior to July 26, 1958, shall have a minimum width of 30 inches.
(b) Stairways. Stairways in buildings altered or converted for use as an apartment house or hotel prior to July 26, 1958 shall have a minimum width of 30 inches. The rise and run of stairways need not be changed if part of the original building construction, except that is such buildings constructed, altered or converted after May 31, 1917 winding stairways are prohibited unless only used as a means of egress.
(c) Stairway Handrails. Every stairway shall have at least one handrail. All stairways more than 44 inches in width shall have handrails for each side, and every stairway required to be more than 88 inches in width shall have intermediate handrails dividing the stairway into portions not more than 66 inches in width. See also Chapter 10 of the San Francisco Building Code.
EXCEPTION: Existing stairways in one-family and two-family dwellings shall have at least one handrail.
(d) Closets and Storage Areas Under Stairs. Closets and storage areas under stairs in Group R, Divisions 1 and 2 Occupancies shall conform to Section 1009.5.3 of the Building Code.
(Added by Ord. 399-89, App. 11/6/89; amended by Ord. 161-92, App. 6/4/92; Ord. 256-07, App. 11/6/2007)