Door Assembly Clearance Requirements

NFPA 80-2007

 

  • The clearance between the top and the vertical edges of the door, the frame, and the meeting edges of doors swinging in pairs shall be 1/8" - 1/16" for Steel Doors.

 

  • The Clearance between the top and vertical edges of the door, the frame and the meeting edges of doors swinging in pairs shall not exceed 1/8" for Wood Doors.

 

  • The clearance under the bottom of a door and non-combustible surface where no sill exists shall be a maximum of 3/4".

 

  • The clearance under the bottom of a door and raised non-combustible sills shall be a maximum of 3/8".

 

  • Where the bottom of the door is more than 38" above the finished floor, the clearance under the bottom of a door shall be a maximum of 3/8" (i.e. Dutch Doors).

 

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Engineered design may change without notice.