This is for a deck. If I make a beam out of two 2x10s, what would the maximum span be? The beams will be 8 feet apart (joist span). They will be resting on posts. The number of posts depends on how far the beams can span. This will be standard pressure treated lumber. I was going to use screws to hold the beams together. Maybe construction adhesive, too.
I have a book that says 8 feet, but want to double check that I'm reading the tables right. this is under a deck, no crazy loads like a hot tub.