i am building a deck for a customer who wants to put a 7'6' x 7'6', 6-7 man hot tub on the deck. it weighs over 5300 lbs full of water. i just added 2 girders with 4-12' sonotubes to the plans under the tub area .
building your deck for a hot tub a standard 8 x 8 hot tub weighs about 5,000 lbs when fully loaded with water and people. needless to say, this is much more than a typical deck frame is designed to support.
decks and hot tubs: what you need to know before you build. add up the tubs dry weight plus the water capacity 1 gallon of h 2 o equals roughly 8.3 lbs. plus the number of recommended occupants multiplied by an average weight per person. heres an example from deckmagazine.com: a 56-sq ft. hot tub with a dry weight of 855 lbs.
standard 4x4 posts can be used for supports, and 2x8 joists will support the weight of most typical hot tubs. check local building codes for footing requirements. twelve inch on center spacing between joists underneath the hot tub will help provide extra support and 2x6 decking is preferred.
how to install a hot tub deck step 1: build the temporary frame. step 2: dig holes for the footers. step 3: build the permanent frame. step 4: add the support posts. step 5: install the joists.
note: most jurisdictions will require a building permit for the addition of a hot tub or spa on a raised deck. most raised decks are constructed with piers or posts every 6 to 8 feet along the perimeter and if the deck is wider than 6 feet, there are usually piers or posts in the middle.
build a solid deck base to support the hot tub weight. when it comes to structural support, the safest bet is a solid base independent of the deck. but if you want to go the post and cement footing route, beaulieu recommends consulting a professional to ensure your load calculations are correct.
once the location of the hot tub deck has been determined, it is time to begin building. the first consideration is size: an 8 foot by 8 foot 2.4 meter by 2.4 meter square deck will accommodate most hot tubs. to build such a hot tub deck, a perfect square must be determined.
how to make a hot tub deck for $250 and 2 hours work for our very portable swift current spa crafts and diy , mobile home makeover , outdoor projects , swift current spa we may earn a commission on purchases made after clicking links on this page.
the total is over 6500 lbs. that is on the heavy side. so if we divide that by the area of the tub 8x8=64 ft2 6500/64=101.56 psf we get approximately 101 psf. a residential deck should be designed to hold 50 psf 40 psf live load and 10 psf dead load .
when filled with water and two humans, the average 8-foot-by-8-foot hot tub weighs approximately 5,000 lbs. a deck built to support a hot tub must, therefore, be sturdy and well-braced.