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StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 7319
Experience:  Structural Engineer
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I need to span a 17' pool daughters wedding wanted to

Customer Question

I need to span a 17' pool for my daughters wedding wanted to see if douglas fir 4x6 @ 12" o.c. is sufficent
JA: OK. Tell me a bit more about what's going on so we can help you best.
Customer: There will be 60 people sitting on it for the ceremony then cleared off for the dance floor with probably 30 to 40 people dancing
JA: Anything else I can tell the Structural Engineer before I connect you two?
Customer: Planning on using 3/4 " struct one plywood. It will be a temporary structure.
JA: I'm sending you to a secure page on JustAnswer so you can place the $5 fully refundable deposit now. While you're filling out that form, I'll tell the Structural Engineer about your situation and connect you two.
Submitted: 1 year ago.
Category: Structural Engineering
Expert:  StructuralEng replied 1 year ago.
Expert:  StructuralEng replied 1 year ago.
I can help. Unfortunately 4x6 will not do it. You would expect deflection of almost 2".Additionally, they rhythmic movement of dancing would make it worse.
Expert:  StructuralEng replied 1 year ago.
4x10 at 16" o.c. Is more appropriate. That will deflect about 1/2" under a 60 psf live load
Expert:  StructuralEng replied 1 year ago.
Hello. Do you have any other questions for me on this topic? If you could rate my answer, I would appreciate it.
Customer: replied 1 year ago.
Thankyou for the help