34 Pa. Code § 7.147 – Guide rail construction.

(a) Car and counterweight guide rails shall be constructed of steel.
(b) Guide rails shall be securely fastened in accordance with the following:
1. (1) Guide rails and their fastenings shall not deflect more than 1/4 inch under normal operation.
2. (2) Joints of guide rails shall be well-fitted and strongly secured.
3. (3) Guide rails and their joints and fastenings shall withstand the application of the safety when stopping the fully-loaded car.
(c) Guide rails shall extend from the bottom of the hoistway to a height above the top landing sufficient to prevent the guide shoes from running off the guides when the car or counterweight is at the extreme upper position.