§ 7.55. Machinery.
(a) In new installations, overhead machinery for passenger elevators shall be securely fastened or cleated to its supports to prevent movement. Overhead bearings shall be placed on the tops of the beams or structural parts to which they may be secured, except that those for idler sheaves, may be placed below the beams, if the parts of the bearings in tension are composed of steel or wrought iron. Such bearings and supports shall possess a strength as specified in § 7.51 (relating to shaftway construction). In existing installations, the Department may, when it deems necessary, require that overhead machinery be relocated or so changed as to conform to safe practices.
(b) No new machinery may be located directly under the elevator shaftway. Existing machinery may remain in such a place, if there is sufficient pit depth, buffer support, and no other hazards involved, and subject to approval by the Board.
(c) Set screw fastenings shall not be used in lieu of keys in the construction or installation of hoisting and car safety mechanisms, except in new installations when the device has been approved by the Department. Cleats are not required when the ropes lead perpendicularly from both sides of the driving shaft.
(d) The operation of elevators by friction gearing or clutch mechanisms is prohibited when such mechanisms form the primary means for the transmission of the power required to operate elevators at normal speeds.
Source The provisions of this § 7.55 amended September 23, 1977, 7 Pa.B. 2696. Immediately preceding text appears at serial pages (17297) and (8069).
Cross References This section cited in 34 Pa. Code § 7.71 (relating to conflicts).
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