lumber sizing and joist/beam spacing for hot tub deck

Old 06-21-03, 08:48 AM
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lumber sizing and joist/beam spacing for hot tub deck

I need to build a deck that will support a 7'X7' hot tub. The deck needs to carry 100lbs/sqft. I need to know if 2X10 joists 16" on center are enough. Also need to know maximum span on these joists for this load so I know how to space beams. I was planning on using doubled-up 2X10's for the beams and 2X6's for the decking. Just wondering if this is enough.
Old 06-22-03, 05:06 AM
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2x10 joists spaced 16" o.c. may be enough, depending on the span. You can find span tables and/or calculators on the following websites:

Doubled up 2x10 beams may also be enough, depending on post spacing, which will probably be 4 to 5 ft. max.

Also, with a hot tub, shifts in water can cause extreme lateral forces, so you will need cross-bracing on your posts and beams.

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