Why Is the Fire Door Keep Misaligned?

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 latch strikes the edge of the keep, enters only part-way, marks the keep, or forces the door sideways during the final part of closing. These are clues about the relationship between the leaf and the frame. Check the leaf position first Before moving the keep, establish where the leaf sits inside the…