OK,
Now the time has come to purchase the spa for our deck which was completed last summer. I built it with the idea that it would support a 230 gallon, 4 adult spa, which would weigh about 2500lbs. Since then we have been considering a bigger spa,( about 375 gal. and about 3600 lbs.) The deck is 16’x25′ and the area for the spa to be located is supported by 4 34″ 4×6 posts resting on 12″ piers well below the frost line. The posts carry 2 4×10 beams spanning 9′. 2×10 joists 12″ o.c. rest on the beams spanning 10′. Will this support the weight of the bigger spa? Does my description provide enough information to get a visual idea of how it was framed up?
Thanks,
Kev.
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Replies
Kev,
This question will receive better (if any) answers on the Breaktime Forum. Try posting it there as this site is primarily focused on woodworking. The Breaktime Forum deals more with general construction, which is in line with your question.
Best,
Seth
mistake. There is no win
and there is no fail . . . there is only
make."
John Cage
If you don't believe the current framing to be stong enough, you could try "sistering" the joists with either another joist or lagging a piece of metal to the existing framework. A friend had to do this for the floor in his house; it used 2x6 for the second floor add-on.
There is an architectural reference called "Graphic Standards", I believe this reference gives span calculations for diminsional lumber. If not, you should be able to locate an equation that will allow you to figure the current framing's load capacity. I believe you will want the "live" load since you will be adding the weight of other furniture and people.