§ 7.296. Belted and silent chain drive elevators.
(a) Worm gear. Newly installed single belted or chain drive elevators shall be of the worm gear type and be overbalanced by at least one third.
(b) Counterweights. All cars shall be properly counterweighted, except that if existing installations are not counterweighted they may be permitted to operate, provided the absence of such counterweights does not constitute a menace, as determined by the Department.
(c) Speed control. Safety mechanisms shall be provided so that in the event of a broken belt or chain the car does not attain a dangerous speed, with or without a load. In lieu of installing cut-out switches, the installation of at least three V-belt drives will be accepted.
(d) Electric brakes. Elevators covered by this section shall be equipped with an electric brake. Electric brakes are required in all cases where electric interlocks are installed in existing structures. In such instances, the requirements of § § 7.283(b) and 7.292(d) (relating to safety requirements; and electric freight elevators) shall also be met.
Cross References This section cited in 34 Pa. Code § 7.285 (relating to control apparatus); and 34 Pa. Code § 7.291 (relating to general).
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