(1) No friction gearing, chain, clutch or chain driven mechanism shall be used for connecting the main driving gear to the traction sheaves;
(2) The motor of each Lift machine or the worm shaft shall be arranged so as to provide hand winding/brake release facilities and shall be suitably marked for the direction ofup and down travel ofthe Lift. All themotors should be of S-4 grade or above duty cycle.
(3) Electric Lift machine shall be provided having brakes released electrically. Independent circuit for brake operation is to be provided.
(4) Traction machines for Lift shall be equipped with the brakes applied automatically by means of springs in compression only or by gravity when the operating device is in the "off" position or in the event ofthe power being cut off due to any cause.
(5) No single earth fault, short circuit or counter electromotive force shall prevent the brake from being applied during normal operation.
(6) The brake shall be designed to have a capacity sufficient to hold the car at rest with 125 percent of its rated load.
(7) No toggle or other device which is dependent upon impact operation shall be used to hold ofthe brake.
(8) Brake ofpassenger and goods Lift shall have at least two brake shoes and the lining used shall be incombustible material.
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(7)
(8)
(9) 24 THEKOLKATAGAZETTE,EXTRAORDINARY, NOVEMBER 11, 2022 [PARrI
(9) Means ofreleasing the brake in emergency shall be provided and the re-application ofthe brake ensured. It shall be ensured that hand winding ofLift, by releasing the brake is done only by trained person.
(10) No brake shall be released in normal operation until power has been applied to the motor.
(11) Any emergency release device fitted to a brake shall not be capable ofholding the brake in the off position during normal operation.
(12) The sheave, drum wormwheel or spur gear ofany Lift machine shall be fixed to its shaft or driving unit either by means of sunk keys or splines according to Indian standards or shall be secured to a flange forming an integral part ofthe shaft or driving unit by means ofturned tight fitting bolts. No set screw fastenings shall be used in lieu ofkeys or other positive connections.
( 13) All machines, pulleys, over speed governors and similar units shall be so supported and held as to prevent any ofthesemachineries orparts thereoffrom becoming loose or displaced affecting their safe working. Supporting beams shall be of steel or reinforced concrete.