Internal Frame (RHS)

A metal frame fitted inside the door leaf to reinforce its structural strength. An internal frame is an excellent means of giving a door additional dimensional stability as a preventative measure against damage and bowing.

This is particularly important in high-traffic settings where the doorway will be under heavy use over extended periods, or in settings where the door may be subject to direct impact or slamming. This is common in oversized doors as the increase of height and width exponentially decreases a door's rigidity and past a certain size requires additional internal support.