Rated load.
Rate of speed.
Starting switches.
Machine brakes.
Governors.
Device to be provided in case step
chain breaks.
Device to be provided in
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23. The rated load of every escalator shall be calculated by means of the formula herein set out where W the width of the stair tread in inches and A the horizontal distance in feet between the teeth of the upper and lower combplates.
Rated load 46 WA pounds.
24. The rate of speed of any escalator shall be not more than one hundred and twenty-five feet per minute measured along the angle of inclination.
25. The starting switch of every escalator shall be- (a) operated by a key: and
(b) situated in such a position that any person operating the same
is able to see the escalator.
26. (1) Every escalator shall be provided with a machine brake. (2) Every such brake shall be capable of stopping the escalator with full rated load thereon.
27. (1) Every escalator shall be provided with a governor. (2) The speed of the escalator at which the governor is designed to operate shall, in no case, be more than forty per cent greater than the rated speed of the escalator.
28. Every escalator shall be provided with an automatic device which will cause the supply of power to the driving machine of the escalator to be cut off in the event of the breaking of a step chain.
29. Where the driving machine of an escalator is connected to the main drive shaft by means of a chain, there shall be provided an auto- chain breaks, matic device which will cause the brake provided for such shaft to be
applied in the event of the breaking of the chain.
case drive
Emergency
stop switches.
30. (1) Every escalator shall be provided with stop switches for use on occasions of emergency.
(2) One such stop switch shall be situated at or near the upper landing of the escalator and the other at or near the lower landing thereof.
(3) Every such stop switch shall-
(2) be operated by means of a button;
(5) be such that the driving machine of the escalater cannot be
started thereby; and
(c) bave clearly marked thereon, in English and Chinese, the
words "STOP SWITCH".
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31. (1) Where an escalator is installed in any building, it shall be Escalator in addition to--
to be an addition to (a) any staircase required by regulation 35 of the Building (Plan- staircases or
ning) Regulations, 1956; and
(5) the means of escape in case of fire and second staircase required by regulation 37 of the Building (Planning) Regula- tions, 1956.
(2) An escalator shall not be a staircase, passage or other normal means of egress for the purposes of regulation 39 of the Building (Planning) Regulations, 1956.
means of escupe in cas of fire, etc. (G.N.A. 77561
32. For the purposes of subsection (1) of section 26A of the Prescribed Ordinance, the period within which plans of escalator works must be period for submitted to the Building Authority for his approval shall be two section 26A Durposes of months from the commencement of these regulations.
of the Ordinance. (63 of 1955).
COUNCIL CHAMBER,
27th November, 1959.
Limer
Clerk of Councils,
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Explanatory Note.
(This Note is not part of the regulations, but is intended to indicate their gencral purport).
These are entirely new regulations of a technical nature. They lay down requirements for the planning and design of escalators and for their installation in building works.
(Secretariat BLI/741/52)