Why Is a Fire Door Rubbing at the Head?

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 top edge of the door rubs the frame, catches at one corner or develops a new contact mark. Sometimes the door still closes with extra force; sometimes it stops before the latch. Map the head contact Check whether the contact is across the whole head, only near one jamb, or limited to…