California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 36 - Hoisting Equipment › GENERAL › Section 7126 - First-Class Hoists

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a)
						(19-3) Belt, rope, or chains shall not be used to connect driving mechanisms to
						man hoists.
(b) The hoist shall be
						provide with ample power to hoist the fully loaded and unbalanced shaft
						conveyance from the lowest point in the shaft.
(c) (19-4) The hoist shall be equipped with 2
						independent and separate braking systems, either of which shall be capable of
						holding 150 percent of the weight of the fully loaded and unbalanced shaft
						conveyance at any point in the shaft.
Such brakes shall be so arranged that the failure of
						  one will not interfere with the proper operation of the other. One such braking
						  system shall operate directly on the hoist drum.
(d) Brakes and other control devices shall be
						arranged and maintained so that they can be easily and safely manipulated by
						the hoistman at his operating station.
(e) No brake required by this section is
						acceptable if its operation depends on engaging a jaw clutch, multiple-tooth
						clutch, or similar device.
(f)
						(19-5) (19-65) The clutch and one brake on every hoist drum shall be so
						arranged that the brake must be applied before the drum can be unclutched, and
						the clutch must be engaged before the brake can be released.
(g) The clutch of every hoist drum shall be
						provided with means to prevent it being accidentally engaged or
						released.
(h) (19-9) Every hoist
						shall be provided with an indicator that will accurately show at any moment the
						position of the conveyance in the shaft.
It is recommended that the indicator be of a type that
						  is operated by the hoist drum through a system of gears.
Belt-driven indicators are not acceptable because of
						  the danger of the belt slipping or breaking.
(i) The hoist drums shall be provided with
						flanges that extend at least three diameters of the hoisting rope radially
						beyond the last layer of rope when all of the rope is coiled on the
						drum.
(j) Bolts and other fittings
						of the hoist shall be made secure by suitable locking devices.
(k) (19-120) The hoist shall be maintained in
						good operating condition. Parts that are defective, broken, cracked, or
						dangerously worn shall be repaired or replaced without delay.
(l) The hoist drum and head sheave shall be
						so aligned that the head sheave is at a right angle to the centerline of the
						hoist drum.
(m) The distance
						between the hoist drum and the nearest fixed sheave shall be not less than 15
						feet for each foot of drum width.
(n) Each hoist drum and head sheave where men
						are hoisted or lowered shall have a minimum diameter according to the type of
						rope used, as given below:
6-strand 7-wire rope--42 times rope diameter
6-strand 19-wire rope--30 times rope diameter
6-strand 37-wire rope--18 times rope diameter
8-strand 19-wire rope--21 times rope
						  diameter
(o) The hoistings
						rope shall be securely fastened to the hoist drum with at least four cable
						clips, or equivalent, and shall have at least three full wraps of cable on the
						drum when the hoisting conveyance is at its greatest depth.
(p) Only a first-class hoist shall be used
						for hoisting or lowering men.
(q)
						(19-7) Man hoists shall be provided with devices to prevent overtravel and
						overspeed.