Learn more about The DoorGap Gauge®. Click the blue circles to get more information.
The ONLY Gauge You Will Need To Check Fire Door Assembly Clearance Requirements!
A sure way to check Fire Door Clearance Requirements before inspection
Will speed up your inspections
More accurate than a tape measure
Compact and easy to use
Supply with job to ensure Fire Assemblies are installed per Fire Door Requirements
To ensure your Fire Door Assemblies meet the requirements set forth by NFPA 80 - Current Editions
Checking other construction assemblies requiring specific clearances and operational tolerances
Door Assembly Clearance Requirements
NFPA 80-Current Editions
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).
Can be used with any style door - hollow metal, wood, aluminum or fiberglass.
Clearances shall be measured from the pull face of the door(s).
The gauge should fit snug in the gap and be able to slide easily along the entire length of the gap.
Insert the gauge between the door and the frame or at the door bottom.
Locate the dimension portion of the gauge needed to measure your gap.
If the fit is too loose, too tight, or doesn't fit, the assembly needs to be corrected for the proper clearance.
Experienced tradesmen can make corrections using established, approved methods.
See specifications on the Articles Page
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