How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask StructuralEng Your Own Question
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 7322
Experience:  Structural Engineer
Type Your Structural Engineering Question Here...
StructuralEng is online now
A new question is answered every 9 seconds

I need to size a beam for a deck. The beam will be 22' and

This answer was rated:

I need to size a beam for a deck. The beam will be 22' long and run between (2) concrete piers, with no posts in between. It will run parallel with the house.
JA: OK. Tell me a bit more about what's going on so we can help you best.
Customer: Sorry, hit enter too soon. The deck is 22' long (this dimension runs parallel with the house), x 22
JA: Is there anything else important you think the Structural Engineer should know?
Customer: sorry! fingers too big this morning! deck is 22' x 22'. The beam will carry 12' joists running perpendicular to the house, overlapping on the centre beam and carried at the outside end (away from house) by another beam which has multiple posts (no loading issue there.)
Customer: replied 2 months ago.
The beam will run down the centre of the deck. The joists are on 12" centres. sketch attached.
I can help.
Do you want to wood or steel for this beam?
Customer: replied 2 months ago.
Thank you for replying. I'm thinking LVL suitably protected from the elements if that is acceptable. I am in Canada, so snow load may be a factor. Same latitude as Upstate NY.
I can size an LVL, but they are really not recommended for exterior applications.
Do you know the snow load in your area? Upstate New York has a very large range of snowboarding acquirements
Customer: replied 2 months ago.
Its an odd application with the deck above having a waterproof membrane Please size as an LVL, and as dimensional lumber although I can't imagine how many 2x12 that's going to be? LOL. Possibly steel as well but weight handling may be an issue. I've attached 2 sheets from the building code for our area for snowloads. Thx.
I will size an LVL. Dimension lumber won't work
You can plan for a 7" x 16" 2.0E LVL
StructuralEng and other Structural Engineering Specialists are ready to help you