The rough opening dimensions for a standard hollow metal frame are as follows: Assumes std. 2″ face, butted wall. “A” = opening width 4 1/2″ “B” = opening height 2 1/4″ So for a 3’0” x 7’0” door
The rough opening dimensions for a standard hollow metal frame are as follows: Assumes std. 2″ face, butted wall. “A” = opening width 4 1/2″ “B” = opening height 2 1/4″ So for a 3’0” x 7’0” door