Steel Beam Garage Door Header

Between 4 and 5 feet the header should be built 2 inches wide and 8 inches long while a larger opening needs a header that is 2 by 12.

Steel beam garage door header. 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. Most door frames that are 4 feet wide or less require a 2 by 6 header. What size and guage of steel i beam do i need for a garage header. Header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening.

And the garage door header is based on a 2 car garage door opening. The only added weight on the header will be 4 by 8 joists 3 4 plyw read more. The beam they have specified now is 3 1 2 x 12 x 18 9. The span for the girder is based on the size of an average sized game room.

Header spans are typical for a window and a patio door. Table 1 consolidates loading sizes and cost data for all of the applications. The structural ridge span represents the size of a large family room. The person doing the takeoff had interpreted my request for an 18 9 garage door header to the least expensive 20 long beam.

Attach lumber to the face of the garage wall to the edge of the garage door header. 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. Last pull a measurement from the top of the 2 x 6 piece of lumber that you just installed to the ceiling of the garage. 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.

Opening is 18 ft wide and beam will rest on 2 18 by 18 posts. Portal frame details within the irc specify simple span headers with a maximum finished opening width of 18. When in doubt use 2 by 12 inch headers.