2019-NFPA 80
- 5.2.3.5.2 (9) Latching Hardware operates and secures the door when it is in the closed position.
- 6.3.1.7 Clearances
- 6.3.1.7.2 The clearances between the top and vertical edges of hollow metal doors and frame, and the meeting stiles of doors swinging in pairs, shall be 1/8″ – 1/16″.
- 6.3.1.7.4 HPDL-faced doors, flush wood doors, and stile and rail wood doors with fire ratings greater than 1∕3 hour shall not have clearances greater than 1∕8 in. (3.18 mm) between the door and frame, regardless of the door frame construction, and the meeting stiles of paired doors.
- 6.3.1.7.5 Door leaves constructed of other materials shall not have clearances greater than 1∕8 in. (3.18 mm) between the top and vertical edges of doors and meeting stiles of paired doors, unless otherwise permitted in the door frame, door, and latching hardware manufacturers’ published listings.
- 6.4.4.8 Strike Plates shall be secured to the frame with steel screws or other types of screws indicated by the manufacturer’s published listings or label service procedure.