I would like to open up the dining/living room area in my 1 story ranch. I would like to install a 3.5" x 12" laminated beam spanning 20'(BEAM #1). BEAM #1 supports the roof trusses at 24" on center. This beam will be supported at one end by the wall and at the other end will tie perpendicularly into BEAM #2. BEAM #2 is 3.5" on center. This beam will be supported at one end by the wall and at the other end will tie perpendicularly into BEAM #2. BEAM #2 is 3.5" spanning 20.5 '. Beam #2 will be supported at both ends by the walls and is not load bearing and it's only purpose it to support BEAM #1. BEAM #1 ties into BEAM #2, 8' from one end of BEAM # 2. See attached diagram. The beams will be constructed out of 8 layers 2x4's glued and screwed together. My question is: Is BEAM #2 sized adequately to support BEAM #1?

Hi jd

Get in touch with a certified architect or structural engineer to evaluate your situation. There are load factors that can answered by them. We don't know if you are in a snow zone or what would be required by your local building dept.

To do what you want would probably need blue prints with architect stamp.

Chuck

If they are indeed roof trusses, and 24" centers would indicate that, you don't need any beam. The trusses bear back to the wall. We build Habitat houses with a 24" span, 5/12 trusses and have no intermediate support. I have a 28X40' log home 7/12 trusses and the only reason for walls is for the BR and Bath. Based on what you tell us, Beam 2 will only be holding up 50% of the weight of beam 1. If you want to make some support, consider a strongback in the attic, 2X4 plate and a 2X6 side. That way, you have a nice open free span.