California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 7 - General Industry Safety Orders
Group 13 - Cranes and Other Hoisting Equipment
Article 92 - Cranes (Except Boom-Type Mobile Cranes)
Section 4898 - Brakes for Hoists
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) Each independent hoisting unit of a crane shall be equipped with at least one self-setting brake, hereafter referred to as a holding brake, applied directly to the motor shaft or some part of the gear train.
(b) Each independent hoisting unit of a crane, except worm-geared hoists, the angle of whose worm is such as to prevent the load from accelerating in the lowering direction, shall, in addition to a holding brake, be equipped with control braking means to prevent over-speeding.
(c) Holding brakes for hoist motors shall have not less than the following percentage of the full load hoisting torque at the point where the brake is applied:
(d) Holding brakes on hoists shall have ample thermal capacity for the frequency of operation required by the service.
(e) Holding brakes on hoists shall be applied automatically when power is removed from the brake holding mechanism.
NOTE: Dynamic braking controls of d-c motors may maintain power at the brake holding mechanism (coil) if the power supply to the crane is interrupted while a load is being lowered. The holding brakes need not be applied automatically in this situation, since the operator can stop or control the lowering speed of the load in a normal manner.
(f) Holding brakes shall be provided with adjustment means to compensate for wear.
(g) The wearing surface of all holding-brake drums or discs shall be smooth.
(h) Each independent hoisting unit of a crane handling hot metal and having power control braking means shall be equipped with at least two holding brakes.
(i) A power control braking means such as regenerative, dynamic or counter-torque braking, or a mechanically controlled braking means shall be capable of maintaining safe lowering speeds of rated loads.
(j) The control braking means shall have ample thermal capacity for the frequency of operation required by service.
1.
Repealer and new section filed 7-17-75; effective thirtieth day thereafter
(Register 75, No. 29).
2. Amendment of subsection (f) filed 8-29-86;
effective thirtieth day thereafter (Register 86, No.
39).
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.