Steel Beam Garage Door Header

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.

Steel beam garage door header. The open span is 14 5 ft there will be a single point load of 4 200 lbs at 4 from one end. I cannot exceed a beam height of 8. 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. The beams will need to span 16 how.

The only added weight on the header will be 4 by 8 joists 3 4 plyw read more. Opening is 18 ft wide and beam will rest on 2 18 by 18 posts. These 9 foot openings are only supported by a makeshift header consisting of 6 cinder blocks sitting horizontally across the top of the opening. The idea behind sizing headers and beams is straight forward.

Add together all live loads and dead loads that act on the member and then choose a material that will resist the load. The beam must be strong enough so it doesn t break fb value and stiff enough so that it doesn t deflect excessively under the load e value. The person doing the takeoff had interpreted my request for an 18 9 garage door header to the least expensive 20 long beam. What size and guage of steel i beam do i need for a garage header.

Tbe row of 6 blocks have a 2 x 10 on top and a 2 x 10 below them. The garage has doors on two sides and the trusses will be landing on the garage door headers. Portal frame details within the irc specify simple span headers with a maximum finished opening width of 18. I need to size a steel beam for over a garage door opening.

The header for a door is much like a bridge transferring the weight above it to the floor and foundation below.