Depending on your opening the lumber width will be 6 to 8 wide.
Garage door header detail.
Portal frame details within the irc specify simple span headers with a maximum finished opening width of 18.
Amarr offers 300 styles of garage doors.
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Frame the rough opening to a height that is 1 5 taller than the door that you have selected.
Choose from carriage house traditional and commercial garage doors in steel wood and wood composite materials.
If the door is 7 tall frame the opening 7 1 5.
For deeper depth parallam.
To finish the opening cut the header and jambs from 2 lumber.
Header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening.
In an attempt to construct portal frames some garages are built with one continuous garage header extending over two or three garage door openings as shown in figure a.
Header details 24 25 nailing on narrow face 25 allowable holes 26 bearing length requirements 26 tapered end cuts 27 multiple member connections 28 29 columns 30 31 product warranty 32 some sizes may not be available in your region.
The width of the rough opening should be 3 inches greater than the width of the garage door you are purchasing.
If it s 9ft the opening must be 9ft 3 inches and so on.