Why Does a Fire Door Catch on the Lock Strike Plate?

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. Watch the contact, do not guess If the door is catching as it reaches the latch, make the latch mortice part of the inspection. Debris or material left inside the mortice can restrict the latch from moving freely in and out. Also check whether the door-to-frame gap is so tight that the latch is being…