N.
THE HONG KONG GOVERNMENT GAZETTE, AUGUST 3, 1934.
(3) The several flights of steps shall be properly supported and enclosed to the satisfaction of the Building Authority and the Licensing Authority.
(4) Staircases, unless constructed of reinforced concrete, shall have solid square (as distinguished from spandril) steps.
(5) The landings, unless constructed of reinforced con- crete, shall be at least six inches thick, and the depth of the landing between the flights shall not be less than the width of the flight.
(6) The treads shall be not less than 11 inches wide and the risers not more than 6 inches high. The treads and risers of each flight shall be of uniform width and height.
Each step shall lap at least one inch over the back edge of the step below.
(7) Every staircase and the roof thereof shall be of such fire-resisting material and construction as may be approved by the Building Authority and the Licensing Authority.
(8) A continuous handrail shall be fixed on each side of all steps and landings at a height of 2 feet 9 inches above the steps or landings. The rail shall be supported by strong metal brackets built into the wall, and shall not project more than 3 inches. Where the flight of steps returns, the newel wall shall be chased so as to allow the handrail to turn without projecting over the landing.
(9) Any other projections from the walls of a staircase shall be at least 6 feet 9 inches above the steps or landings and any recesses shall be defended.
23. (1) All doors used by the public as exit doors shall, Doors and unless otherwise agreed by the Building Authority and the fastenings. Licensing Authority in writing, be hung in two folds, shall be made to open in the direction of exit and shall be hung so as not to obstruct, when open, any gangway, passage, staircase or landing. If such doors are also intended for use as en- trances, one of the folds shall be made to open both ways.
(2) Doors leading from exit passages, staircases or corridors shall, where considered necessary by the Licensing Authority, be hung so as to be closed by the stream of persons passing from the auditorium to the street, and shall in any case be fitted with springs and arranged so as not to clash with exit or other doors.
(3) A door shall not open immediately upon a step or steps, but a landing at least 3 feet in depth shall be provided between the step or steps and the door.
(4) Where, for convenience of working, a door not.
pro viding fire separation is required to be held open into a vestibule or corridor, it shall be fitted with a suitable device which will allow it to shut readily by gentle pressure in case of emergency.
(5) No fastenings other than automatic bolts shall be fitted on exit doors. The automatic bolts shall be without sharp projections and shall be of such pattern that horizontal pressure on either cross bar will open the doors. The cross bars shall not be placed at a greater height than 3 feet. Doors fitted with automatic bolts shall have the words "PUSH BAR TO OPEN" painted upon them in block letters at least 4 inches high, in English and Chinese
(6) Locking bars, hasps, staples, screw-eyes or any fastenings other than automatic fastenings shall not be fitted on exit doors.
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