How to Rebuild the Hinge Reference From an Existing Fire Door

How to Rebuild the Hinge Reference From an Existing Fire Door Related diagnostic: Replacing All Three Hinges: How to Avoid Changing the Door’s Geometry explores the connected fault pattern and helps compare the evidence before choosing a repair. On an existing fire door, the hinge arrangement is part of the evidence. A simple hinge map can preserve information that disappears as soon as hardware is removed or moved. What the pattern is telling you Use one common datum and record each hinge start and end, its make and model, blade dimensions, screw pattern, recess and visible fixing condition. The practical Proudman reference of about 150 mm at the top and 225 mm at the bottom is a comparison point, not a universal statutory requirement. For hinge faults I would preserve the hinge reference before changing hardware. Record position, make and…