Steel Beam Garage Door Header

These 9 foot openings are only supported by a makeshift header consisting of 6 cinder blocks sitting horizontally across the top of the opening.

Steel beam garage door header.

I need to size a steel beam for over a garage door opening. We have an old cinder block garage shed building built in 1967 with 2 9 foot wide garage door openings. Portal frame details within the irc specify simple span headers with a maximum finished opening width of 18. Opening is 18 ft wide and beam will rest on 2 18 by 18 posts.

The person doing the takeoff had interpreted my request for an 18 9 garage door header to the least expensive 20 long beam. Tbe row of 6 blocks have a 2 x 10 on top and a 2 x 10 below them. The only added weight on the header will be 4 by 8 joists 3 4 plyw read more. Doors in a load bearing wall that holds the weight of the house created by beams and trusses need a larger header than those in non load bearing walls.

I cannot exceed a beam height of 8. 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. 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 header for a door is much like a bridge transferring the weight above it to the floor and foundation below.

The beams will need to span 16 how. 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 they have specified now is 3 1 2 x 12 x 18 9. The idea behind sizing headers and beams is straight forward.

The garage has doors on two sides and the trusses will be landing on the garage door headers.