408.3.2 Swinging Doors.
Swinging hoistway doors shall open and close automatically and shall comply with 404, 407.3.2 and 408.3.2.
408.3.2.1 Power Operation.
Swinging doors shall be power-operated and shall comply with ANSI/BHMA A156.19 (1997 or 2002 edition) (incorporated by reference, see "Referenced Standards" in Chapter 1).
408.3.2.2 Duration.
Power-operated swinging doors shall remain open for 20 seconds minimum when activated.
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