Eyal Bedrik of Entry Systems, Ltd., sent me these photos which help to illustrate what happens when a protection plate is sized incorrectly. In addition to the requirements for protection plates on fire doors (those are here), there is the very simple question…
How wide should a protection plate be?
For once, this is an easy one to answer. For single doors, the kick plate width is typically 2 inches less than the nominal door width (36 inches – 2 inches = 34 inches). This ensures that there is no conflict between the plate and the stops on the frame. For pairs of doors without a mullion, the width of the plate is usually 1 inch less than the door width. With a mullion, the single-door formula is typically used – door width minus 2 inches. This can vary slightly depending on the width of the mullion.
This is what happens when your protection plate is too wide: