California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 4 - Construction Safety Orders
Article 14 - Construction Hoists
Section 1604.23 - Terminal Stopping Devices
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) General Requirements.
Normal- and final-terminal stopping device switches shall conform to the following requirements:
Arrangements which depend on a spring or gravity, or both, to open the contacts shall not be used.
(b) Normal-Terminal Stopping Devices.
Upper and lower normal-terminal stopping devices shall be provided to stop the car automatically, at or near the top and bottom terminal landings, with any load up to and including rated load in the car and from any speed attained normal stopping means and of the final-terminal stopping device. The device shall be so designed and installed that it will continue to function until the final-terminal stopping device operates. The normal-terminal stopping device may be used as the normal stopping means.
Stopping switches for normal-terminal stopping devices shall be located as follows:
Stopping switches located in a machine room shall conform to the following requirements:
(c) Final-Terminal Stopping Devices.
Final-terminal stopping devices shall be provided and arranged to cause the electric power to be removed automatically from the hoist driving-machine motor and brake after the car has passed a terminal landing. The device shall be set to function as close to the terminal landing as practicable but so that under normal operating conditions it will not function when the car is stopped by the normal-terminal stopping device. Where spring buffers are provided, the device shall function before the buffer is engaged. The device shall be so designed and installed that it will continue to function at the following:
The operation of final-terminal stopping devices shall prevent movement of the car by the normal operating devices in both directions of travel and shall be reset manually.
Final-terminal stopping devices shall be located as follows:
The normal- and final-terminal stopping device shall not control the same controller switches unless two or more separate and independent switches are provided, two of which shall be closed to complete the driving-machine motor-and-brake circuit in either direction of travel. Where a two- or three-phase AC driving-machine motor is used, these switches shall be of the multi-pole type.
The control shall be so designed and installed that a single ground or short circuit may permit either, but not prevent both, the normal- or final-terminal stopping device circuits from stopping the car.
Final-terminal stopping devices for drum machines shall conform to the following requirements:
(d) Terminal Speed-Limiting Devices.
Terminal speed-limiting devices shall be installed when reduced-stroke oil buffers are used, and car speed exceeds 300 feet per minute. These devices shall conform to the following requirements: