Sec. 8-1.49. Hoistway

(a) [Enclosure.] The hoistway shall be enclosed as specified in sections 8-1.13 and 8-1.14 for installations in factory buildings erected before October 1, 1913, and in mercantile establishments in buildings erected before November 1, 1920, and section 8-1.16 for installations in factory buildings erected after October 1, 1913, and in mercantile establishments in buildings erected after November 1, 1920.

(b) Door interlocks and keys.

The hoistway door shall be equipped with hoistway unit interlocking device as described in section 8-1.55 to prevent the movement of the elevator car away from any landing when any hoistway door is open or unlocked. The emergency release described in section 8-1.57 will not be permitted. The hoistway doors shall be so arranged that they cannot be opened until the floor of the car is brought to rest within three inches of the designated landing, nor after the car leaves the landing, except in an emergency. Emergency keys shall be provided for unlocking at least one door from the outside.

(c) Machinery and cables.

(1) All machinery and attachments shall be made sufficiently strong for the purpose intended and be properly installed and maintained. All machines shall have magnetic brakes.

(2) There shall be not less than two car and counterweight cables. The cables and their fastenings shall have a factor of safety of not less than six.

(d) Car gate contact.

(1) The car openings shall be provided with gates equipped with an electric contact as described in section 8-1.56, or other approved devices performing similar functions to prevent the movement of the car away from the landing if any of the car gates are open.

Exceptions:

(1) The car may be operated from the hall buttons with the car gate or gates open if the elevator is arranged so that it will not be operated under this condition with a passenger or passengers in the car. (2) Push button elevators used exclusively as freight elevators.

(e) [Dual control.]

An automatic push button control elevator may be equipped with a dual control, viz: switch and push buttons. Such elevator equipment shall be made to comply with the requirements of this section except that the switchboards in the machine room shall be equipped with a throw over switch enabling the car to be operated either by push buttons on the landing and in the car or by a switch in the car only. The hoistway door interlocks and the car cam controlling the action of such interlocks shall be effective during either method of operation.

(f) Operation.

(1) Automatic push button control elevators hereafter installed shall be so designed and equipped that the car at its rated speed and load will automatically stop when the car floor is level with or not more than three inches above or below the designated landing floor.

(2) There shall be permanently posted in every car a plate of instructions of how to operate the car and open the hoistway doors.

(g) Signals.

A signaling device shall be provided in the car for the purpose of notifying the persons in charge of the premises, in case the car becomes stopped in the hoistway from any cause.

Exception:

Push button elevators used exclusively as freight elevators.