§ 7.274. Shaftway clearances.
Shaftway clearances shall conform to the following:
(1) New freight elevators, except handpower, sidewalk, plunger, hydraulic or plunger hydrosteam types, shall be so constructed that the minimum clearance between the highest point of the elevator car crosshead and the lowest point of any overhead construction when the car platform is flush with the upper terminal landing and the minimum clearance between the lowest point of such elevator car bottom of safety plank and the pit floor or top of any construction contained therein when the elevator car is at the lowest terminal landing shall conform to the following table:
Location Allowance in Feet Overrun Clear Total Top of shaftway 2 2 4 Bottom of shaftway 2 2 4 (2) When bumpers are used, the clear distances specified in paragraph (4) mean when the bumpers are fully compressed.
(3) For speeds in excess of 125 feet per minute, the table set forth for passenger elevators in § 7.53 (relating to shaftway clearances) shall apply.
(4) Plunger hydraulic and plunger hydrosteam elevators shall be so constructed that the minimum clearance between the lowest point of any over- head construction and the top of the crosshead is two feet when the car platform has reached its highest possible limit of travel. The installation of plungers longer than necessary for present travel is prohibited unless the plunger is provided with a positive mechanical stop which would be adequate to absorb the maximum impact load. The clearance at the bottom, however, shall be the same as for electric freight elevators with an overrun of not less than six inches.
(5) Existing clearances and over travel will be accepted, except where changes are necessary for the safety of repairmen, oilers, and inspectors.
Source The provisions of this § 7.274 amended through December 21, 1967.
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 § 7.298 (relating to gravity elevators); and 34 Pa. Code § 7.300 (relating to electric or oil-electric platform elevators).
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