Why Has a Fire Door Frame Split Around a Fixing?

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 A crack or split appears at a frame fixing, often around the screw or fixing point. The door may then develop changing gaps, binding or latch problems. Inspect the full fixing zone Check the direction and extent of the split, whether timber has crushed, and whether the fixing still appears to have sound…