I use 2x 6 or 8 rough spruce/hemfir on a standard opening. Stan its not what the garage door people will allow, but the codes and that depends on the load above. You can special order Doors that are higher or shorter than 6 feet 8 inches. The Door Rough Opening is based upon the Width of the Door plus 1 inch each side to allow for the Door Frame. FLOOR AREA IN SQ. FT. PER OCCUPANT Business areas 100 gross Residential 200 gross This Information is shown so that you can see how the Codes relate to the Door Requirements.
Garage Door Opening