220.127.116.11 Hoistway Doors and Gates
(b) Where temporary swinging solid hoistway doors are used, a vision panel covered with material that will reject a ball 25 mm (1 in.) in diameter and have a deflection not greater than any other part of the door shall be provided. The total area of the vision panel shall be not more than 0.016 m2 (25 in.2) and it shall be located between 1370 mm (54 in.) and 1675 mm (66 in.) above the floor level.
(a) For elevators with car speeds up to 1.75 m/s (350 ft/min), hoistway doors or gates shall be provided with means that will latch the doors or gates mechanically so that they cannot be opened from the landing side, conforming to 18.104.22.168.1. Means shall be provided at a designated landing for unlatching the hoistway door or gate from the landing side to permit access to the car. At this landing, positive means shall be provided to lock the elevator entrance out of service.
(c) The mechanical locking device, when used on temporary doors, shall be self-latching.
Permanent hoistway doors shall conform to 2.12.1. The electrical circuitry for hoistway door interlocks, or combination mechanical locks and electric contacts, does not have to be operational at this time unless the car speed is over 1.75 m/s (350 ft/min).