6.4.4−Locks or Latches
Any lock, latch, or fire exit hardware shall meet both life safety (i.e. single motion to unlatch) and fire protection requirements. All single doors and the active leaves on pairs of doors shall have an active latch that cannot be held retracted, unless it projects automatically upon fire alarm.
The inactive leaf on pairs of doors not required for exit purposes may have automatic flush bolts, except where panic hardware is required. Listed manual flush bolts or listed surface bolts can be used on pairs of doors to rooms not normally occupied. Doors in a means of egress shall not have deadbolts unless retracted when the latch bolt is retracted (i.e. simultaneous latch retraction and interconnected locks).
Protective plates more than 406 mm (16 in.) high require specific door manufacturer’s listing. To not need a label, the plate has to be located within the bottom 406 mm of the door. In other words, a stretcher plate needs a label because it is mounted above this area. Larger field-installed protection plates must be labelled and installed in accordance with their listing.
Doors swinging in pairs, where located in a means of egress, shall not be equipped with astragals that inhibit free use of either leaf. Pairs of doors that do require astragals must have at least one attached in place to project approximately 19 mm (3/4 in.) or as otherwise indicated in the individual published listings.
Gasketing on fire doors or frames shall be furnished only in accordance with the published listings of the door, frame, and gasketing material manufacturer.
All devices shall be installed in accordance to the manufacturer’s instructions and adjusted to function as described in the listing.
NFPA 80-2007, 5.2.1–Inspection
Fire door assemblies shall be inspected and tested not less than annually and a written report shall be signed and kept for inspection by the AHJ. Doors, frames, and hardware are tested and Underwriters Laboratories (UL)- or Intertek Testing Services (ITS)-labelled based on performance. No single door leaf may exceed 1219 mm (48 in.) in width or 3.1 m (10 ft) in height.