door type affects the speed and quality of elevator service considerable
power operated and synced with leveling controls so doors are open when cab full stops at the landing.
Closing time = varies with type of door and opening size
Closing strength = limited to 7 ft-lb and closing pressure to 30 lb for safety
opening size = 3'-6" recommended for faster passenger transfer, 3'-0" only recommended for residential or light traffic
Typical sizes:
single slide, 24-36" wide
standard commercial 42" center opening door, 48-60" recommended for hospital or service car
Two-speed 42", general commercial
Two-speed 60", dept. store, freight and passenger
Sensing devices
detect occupants in wide area in front of doors, waits a set time for passengers detected, for luggage, baggage, hospitals
detect occupant in path of door, and reopens
safety edge device = required by ANSI, on contact reopens doors
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