1917 (#619-628) - Laserfiche WebLink

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200 staircases from ~ach tier shall be full width of staircase. No door shall open directly upon a flight of stairs but upon a landing at least the width of the door. The ceiling of the auditorium shall be formed of fireproof materials, as must also be the ceiling under each gallery. All plastering in the audotorium of any room used in connection with the auditorium, must be on metal lath or masonry, and all partitions in amy of the rooms used by the audience in connection with the audotorium, must be constructed of fire proof materials and wood wainscoting or a covering of canvas or other combustible mster~al must not be on the walls and ceiling of such rooms. All galleries and balconies must be so constructed between the gallery floor and the ceiling below that all open s~ues are thoroughly fire stopped and can be easily inspected. N~ space may be over 36 sq. ft. in area without a fire stop. All gallery structural members must be fire,roof or mill con- struction, and subject to Buildeing Inspector's approval. Wood sounding boards may be constructed over the orchestra pit when the sm~e extend back of and below the hanging ~f the stage, but such a sounding board must be fire stopped by a masonry wall back of it. All sects in the audi- torium, excepting those contained in boxes ~hall not be~ess than 30" from back to back and not less than lg" from center to center, and firmly secured to the floor, and no seat shall have more than six seats intervening between it and an aisle on either side. No seats shall be allowed in the aisle, nor shall anyone be allowed to stand or seat themselves in the aisle durin~ thc performance excepting employees of the thea- ter or city. Platforms in galleries formed to receive seats shall not be more than 2~" in height of riser or less than 30" in width of platform. With seats on both sides must be not less than three feet wide at any point, and must increase in width toward the exits at the ratio of l~" to five running feet. Aisles with seats on one side only, must begin not less than 2'6" wide and must have the same increase in width towards the exits. Wherever possiule to overcome differences of level, gradients or inclined planes shall be used in place of steps. Every theater accommodating more than three hun- dred persons shall have at least two exits, five hu~red persons at least t~ee exits. Entrance or exit stairways must be not less thmn 5'0" in width when intended for the use of the public and .~re the seating capacity of the theater exceeds five hundred p~ sons there must be an aggregate of 20, added to the exit width for e~ch additional 100 people or fraction thereof. Balconies or galleries above the first gallery or balcony must be pro- vided with distinct ~laces of exit and entrance, but a common place of exit and entrance may serve for a main floor and first gallery provided it meet aggregat~ capacity of the outlet from these floors. No passage leading to the foot of any stairway communicating with any entrance or exit, shall be lees than 4'0" in width at any point. This caluse not applying to the emergency exits in the exit corridor. Stairs from balconies or galleries shall not communicate with basement or cellar. All stairs shall have treads of uniform width, and risers of uniform height throughout every flight. Wh~re a gallery has a seating capacity of over one hundred people there must be at least two flights of stairs leading from opposite sides of the gallery, and 6" shall be added to the aggresate width of these stairs for every additional fifty people or fraction thereof to be seated in such gallery. This width to be added equally to the two flights. ~idth of all stairs shall be measured in the clear between hand rails, Stairs leading to the first gallery may be left open on one side, but in no case shall stairs to any gallery be left open on both sides. When stairs return direct- ly on themselves a landing the full width of both flights shall be provided and the outer corners of such a landing shall be curved to a radius of not less. than 2' 0"~ n9 winders shall be used in any stai~s intended for the public, but where stairs turn at an angle they shall have a proper lending introduced without winders at such a turn, Where two flights connect into one main flight, this main flight must have a width equal to the aggregate width of the side flights. All stai~ ways shall have on both sides strong hand rails firmly sUpport- ed, and if placed against wall left 3" in the clear and abo~ 3' O" above the stairs, but such hand rail shall not be run on level platforms and lm~fngs, where the same are of greater length than the width of thc stairs. All stairways 8'0" or over in width shall have a center hand rail not less than 2" in diameter placed at the same height as the si~e hand rails and supported on metal standard~ of sufficient strength to hold it firmly. Such standards to be not closer than 4' O" nor farther than 6'0" apart and at the end of each flight of stairs on each landing this center rail shall terminate in a standard at ],east 4'0" in height. In no case shall the risers of any stairs exceed ?½" in height, nor shall the net width of the treads be less than 10~".