Steel Beam Garage Door Header

The structural ridge span represents the size of a large family room.

Steel beam garage door header.

The beam they have specified now is 3 1 2 x 12 x 18 9. Header spans are typical for a window and a patio door. 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. Measure the width of your door frame.

The person doing the takeoff had interpreted my request for an 18 9 garage door header to the least expensive 20 long beam. 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. Attach lumber to the face of the garage wall to the edge of the garage door header. The only added weight on the header will be 4 by 8 joists 3 4 plyw read more.

What size and guage of steel i beam do i need for a garage header. The span for the girder is based on the size of an average sized game room. 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. Header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening.

Cut a 2 x 6 piece of lumber and nail to the face of wall exactly in the center of the garage header. And the garage door header is based on a 2 car garage door opening. Most door frames that are 4 feet wide or less require a 2 by 6 header. 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. Table 1 consolidates loading sizes and cost data for all of the applications. Opening is 18 ft wide and beam will rest on 2 18 by 18 posts.