Railings protecting open sides of landings, balconies, mezzanines, and the like shall be at least 42 inches high. (j) Handrails shall be provided on any stair landing, balcony, ramp, aisle, and the like located along the edge of open sided floors or mezzanines to prevent falls over the open side. (i) Handrails on stairs shall be not less than 30 inches nor more than 34 inches above the upper surface of the tread, measured vertically to the top of the rail, from a point on the tread 1 inch back from the leading edge. The lowest rail shall be measured vertically from the tread nosing. Longitudinal rails shall not exceed 6 inches measured at right angles to the rails. Balusters shall be spaced not more than 6 inches apart. Longitudinal rails or balusters or both shall be provided. The clear distance between handrail and wall or other obstruction shall be not less than 1 1/2 inches. (h) All stairways, landings, balconies, open sided floors, and the like shall have well secured handrails. (g) No arrangement of treads known as winders shall be permitted in required exit stairways. (f) Where material of stair treads and landings is such as to present a danger of slipping, nonskid material shall be applied. All treads less than 10 inches, as measured horizontally between the face of risers, shall have an effective projection of approximately 1 inch beyond the face of the riser below. Variation in height of risers in adjacent flights shall not exceed 1/4 inch. (e) There shall be no variation in the width of treads or the height of risers in any flight. (d) The narrowest width in a stairway or landing serving a stairway shall determine the units of width for the entire stairway. Intermediate landings on straight run stairs shall have a minimum length of 3 feet. (c) The minimum width of landings shall be the same width as the stairs they serve. Maximum vertical distances between landings One side under 40" in width, both sides 40" or more in width Required handrails (Each handrail is allowed to project 3" without decreasing theminimum clear width) (b) Intercommunicating stairways shall be Class A or Class B types in accordance with the following table: Intercommunicating stairways shall comply with subsections (b)(q) when used as a required means of egress. They are not required to discharge directly to grade. (a) Intercommunicating stairways are stairways which connect two or more floor levels of a building. Code § 50.26. Intercommunicating stairway.
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