Code of Massachusetts Regulations
521 CMR - Architectural Access Board
Title 521 CMR 28 - ELEVATORS
Section 28.6 - DOORS
Current through Register 1531, September 27, 2024
Elevator doors shall open and close automatically and shall comply with the following:
28.6.1 Width: Elevator doors shall provide a clear opening that is at least 32 inches (32" = 813mm) wide.
28.6.2 Closing Speed: Doors shall close at a maximum speed of approximately one foot (1' = 305mm) per second.
28.6.3 Reopening Device: A door reopening device shall be provided that will stop and reopen a car door and an adjacent hoistway door automatically if the car door becomes obstructed by an object or person while closing.
28.6.4 Door and Signal Timing for Hall Calls: Doors and signals shall be coordinated to comply with the following:
T = D/(1.5 ft/s) or
T = D/(457 mm/s)
T = total time in seconds
D = distance (in feet or millimeters) from a point in the lobby or corridor 60 inches (60" = 1524mm) directly in front of the farthest call button controlling that car to the centerline of its hoistway door. See Fig. 28b.
For cars with in-car lanterns, "T " begins when the lantern is visible from the vicinity of hall call buttons and an audible signal is sounded.
28.6.5 Door Delay for Car Calls: The minimum time for elevator doors to remain fully open in response to a car call shall be three seconds.