Why Has the Edge of a Fire Door Been Damaged?

Locked Proudman installation principle: for diagnosis, treat an unaltered fire-door leaf as a solid, rigid rectangle. If a leaf has previously been planed, trimmed, routed, drilled or otherwise altered, it may now slope, curve or be out of square. Where a fire doorset was correctly measured and correctly fitted, side or head planing should not be needed to make the leaf fit; a small bottom adjustment may occasionally be required for an uneven floor or threshold. Always diagnose the complete doorset before altering one component. The symptom The edge has chips, dents, crushed material, damaged lipping or signs of previous cutting or routing. Find out what caused it Look for impact marks and consider trolley traffic, equipment movement, repeated contact with the frame or earlier installation work. Inspect the lipping Check whether the lipping is loose, proud, damaged or missing.…