Where can I find information on laminated beams, I'beams, and site-built beams? I would like to have information on their spans and load bearing capabilities. I have a barn that I'm transforming into a shop. I'm using the second floor for a woodshop. there are two 23' beams consisting of 4 12' 6x6" posts supporting the second floor. These are supported with 4x4 posts at each end and in the middle of each 12' post. There is a brick footer running from the front of the barn to the rear supporting the posts. 12' joists run from the left side of the barn to the left beam. 6' joists run from this beam to the rightmost beam. Then 12' joists run from this beam to the right wall. Therefore, there are 10 posts supporting the beam. I would like to eliminate the 6 posts in the center of the first floor. Does anyone know where I can find information on this?