Measure Your Rough Opening

A (width) by B (height) = size door you need

Note: Measure opening in feet and inches.

Determine Bracket Mounting
Surface Areas

Refer to the height chart below for minimum areas required for your door to operate correctly.

Determine Clearance Areas

Refer to the height chart below for minimum areas required for your door to operate correctly.

200M
Door Height
Up to 7’4″ 7’5″ – 8’8″ 8’9″ – 10′ 10’1″ – 14′
C = Header Bracket Width 4″ 4″ 4″ 4″
D = Header Bracket Height 7-1/2″ 7-1/2″ 7-1/2″ 7-1/2″
E = Sideroom 4″ 4″ 4″ 4″
F = Backroom 17″ 17-1/2″ 18-1/4″ 19-1/4″
G = Headroom 15-1/2″ 16″ 17″ 18″
400M
Door Height
Up to 8′ 8’1″ – 10′ 10’1″ – 14′ 14’1″ – 16′ 16’1″ – 18′
C = Header Bracket Width 8-1/2″ 8-1/2″ 8-1/2″ 8-1/2″ 8-1/2″
D = Header Bracket Height 9″ 9″ 9″ 9″ 9″
E = Sideroom 6″ 6″ 6″ 6″ 6″
F = Backroom 19″ 21″ 22″ 23″ 24″
G = Headroom 17″ 19″ 20″ 21″ 22″