Load capacity of deck


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Old 04-19-20, 06:11 PM
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Load capacity of deck

I have a strange deck layout that I'd like to put a hot tub on. It is in a "bump in" on my house. The deck is 11'6" x 12'. It has 2x10 joists and ledgers on 2 sides, so the 2x10's span 11'6". They are 16"o.c. What is the PSF capacity of this deck? Every calculator I find has a ledger on one side and a beam/posts on the other.

Wes
 
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Old 04-19-20, 06:31 PM
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That's the sort of stuff a structural engineer or architect could tell you if you paid them. Assuming the ledgers are sufficiently bolted, I would suggest you sister (double) all the joists under the hot tub.
 
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Old 04-19-20, 06:39 PM
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Making an appointment tomorrow assuming I can find someone to come out. I was just doing my homework ahead of time. My math came up at ~73 PSF. I'm hoping I'm close! :-) Ledgers are both done to code.
 
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Old 04-20-20, 05:46 AM
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Decks are often calculated figuring 10 pounds per square foot for the deck itself and 40 or 50 pounds per square foot of live load (people). So, you're 73 PSF is an instant red flag. I personally would not consider supporting a spa off your existing ledgers. I would install footings and build a support structure where you intend to install the spa. Many spa's include instructions with their spas.
 
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