Section 7.277. Locking devices

(a) When the landing doors of power-driven freight elevators, except automatic control elevators, are of the manually operating type, an approved automatic locking device shall be placed on, or attached to, such doors. This requirement does not apply when the landing doors are on the outside of the shaftway and the entrance is further protected by a landing gate. The locking device shall prevent the normal operation of the car while the door on the landing at which the car may be standing is open or unsecured. Such locking device shall not be affected by ordinary deviation from true alignment of either the car or landing doors and shall not project into the shaftway to such an extent as to create a hazard.

(b) Each locking device installed shall be stamped or otherwise have irremovably placed on such device a type or model number which corresponds to the type or model number listed with the Department when such device was approved. No change shall be made in the design of approved locking devices unless the Board is notified and has acquiesced in such change. No locking device of any kind other than approved-type interlocks is permitted on any hoistway door.

(c) When springs are used in locking devices to create and maintain a condition of safety, they shall be of such strength as to insure against a hazardous condition through breakage or misplacement.

(d) The installation of emergency releases on freight elevators is prohibited.

Notation

Cross References

This section cited in 34 Pa. Code § 7.291 (relating to general); 34 Pa. Code § 7.295 (relating to hydraulic freight elevators); 34 Pa. Code § 7.297 (relating to hand elevators); and 34 Pa. Code § 7.298 (relating to gravity elevators).