Garage Door Header Beam

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Garage door header beam.

Portal frame details within the irc specify simple span headers with a maximum finished opening width of 18. Anything 5 and above we always at least double cripple. 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 spans for exterior walls on buildings 20 wide.

On previous projects i have been supplied a glu lam boise makes specifically for garage door headers that was 3 1 2 x 11 1 4 x 18 9. Use two nails on each end and at splices. Window door garage door headers supporting roof loads only. Header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening.

These small areas are usually door opening on the interior and people are trained that these areas are the strongest place in a house to be in the case of an emergency. The beam they have specified now is 3 1 2 x 12 x 18 9. Header requirement 2 at minimum the header should be 12 wide with doubled 2 4 at opening and ceiling running the width of the door with a 2 4 in the center of the opening for the center bracket to attach to. According to the 2012 irc codes any beam joist or header shall never have a bearing of less than 1 1 2.

The procedure for constructing a header for 6 inch exterior wall framing can be modified for any wall thickness. The notch can not exceed 25 of the width of the board. The bottom of any beam may be notched only on its end. Building a structural header for a garage door opening can be handled on the jobsite and will offer the same structural support as more expensive solid wood beams.

Tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications. Stagger the rest of the nails 32 o c.