Why Does a Fire Door Stop Short of the Latch?

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 last few millimetres matter A particularly common reason for a door to bounce back at the final stage is a gap that is only slightly too tight. When the door reaches the closed position, the closing edge can press into the side of a brush seal instead of moving cleanly past it. That extra…