Grab your gauge, find the size you are looking to confirm and insert the gap gauge under the bottom of the door and take an accurate measurement. For Steel Doors Swinging in sets the clearance between the top and the vertical edges of the door, the frame, and the meeting edges shall be 1/8 ″– 1/16 ″. We have actually produced the following list for property managers and building owners for keeping their doors within NFPA 80 compliance. At All Things Inspector, we are experts at developing materials that help construction crews keep up with fire door compliance.

Keep in mind and note all clearance measurements on the pull side of the door so you can document them for your annual NFPA 80 inspection. The clearance at the underside of the bottom of a door and non-combustible surface shall not exceed 3/4 ″. Step 1– Find out what kind of door and frame you are inspecting to determine the required NFPA 80 requirements. Door Requirements – For the Top & Verticle Edge For Wood Doors Swinging in pairs the clearance in between the leading and vertical edges of the door, the frame, and the meeting edges will not surpass 1/8 ″.

The clearance under the bottom of a door and raised non-combustible sills will be an optimum of 3/8 ″.

Step 3– Verify that your door gap gauge that the gaps fall within the clearances outlined by NFPA 80 and change as required. Step 4– If you still require some assistance we have a couple of how to use a door gap gauge videos that you can watch.

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