Steel Beam Garage Door Header

The idea behind sizing headers and beams is straight forward.

Steel beam garage door header.

The only added weight on the header will be 4 by 8 joists 3 4 plyw read more. We have an old cinder block garage shed building built in 1967 with 2 9 foot wide garage door openings. The open span is 14 5 ft there will be a single point load of 4 200 lbs at 4 from one end. 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 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. Tbe row of 6 blocks have a 2 x 10 on top and a 2 x 10 below them. 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.

These 9 foot openings are only supported by a makeshift header consisting of 6 cinder blocks sitting horizontally across the top of the opening. Opening is 18 ft wide and beam will rest on 2 18 by 18 posts. The header for a door is much like a bridge transferring the weight above it to the floor and foundation below. I cannot exceed a beam height of 8.

What size and guage of steel i beam do i need for a garage header. 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. 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. The beam they have specified now is 3 1 2 x 12 x 18 9.

Portal frame details within the irc specify simple span headers with a maximum finished opening width of 18.