I need to span a beam 11' between two 6x6 posts to support the rafters for a covered pergola. I was thinking of fastening 3 pieces of 2x6 together to create a stronger piece. Is it possible?

Is there a calculator somewhere for this? I was looking at some tables, but most of them are for decks, which require higher loads than this - 10psf dead load, 5psf live load.


You can use the Sagulator. Putting in some quick numbers for Ponderosa Pine, I found a single 2x6 on edge to be acceptable for an 11' span holding up to ~1000 pounds total. Laminating 2 or 3 together will be plenty acceptable, and may be overkill, depending on the wood you're using.

  • If the load values are right for your local code. This sounds close to me + – Ed Beal Sep 28 '16 at 0:12

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.