It is usually only necessary to add extra structural support to the area under the hot tub or spa, not the entire deck. It's ideal. The second is to build a deck strong enough to support the weight of a hot tub filled with water and people enjoying themselves. The wood deck should be flush with the top of the tub. This deck hot tub looks more distinctive with its multicolor finish. It is also to speak with a renovation expert about the status of your deck before starting any projects on your own. We have collected some great tips and advice from deckmagazine.com and other online sources. .. to structural support, the safest bet is a solid base independent of the deck. Not all decks can support a hot tub! My engineer informed me that my current deck needed more support even before adding a spa or hot tub. To safely support a hot tub, a deck needs to handle upwards of 150 pounds per square foot. (8.35 lbs / gallon). Hot Tub Buying Guide Support your hot tub on a deck. That is a total of 4,322 lbs. This will involve several load cases. That said, it’s important to seek the help of an expert when it comes to installing a hot tub on a deck. Download a hot tub buyer’s guide to learn more about our models. I appreciate your info. Note: The supporting structure of the deck can most likely be modified to take the additional weight of the hot tub or spa. You will need larger lumber and more of it. My deck is made of all 2x6 material 12" on center floor joist, with 4x4 post and a 2x12 support … As hot tubs have become increasingly popular to install in gardens across the country, decking has become the platform of choice. Have your deck design wrap entirely around the hot tub. 2. The spa filled has 320 gallons or 2672 lbs. Note: The supporting structure of the deck can most likely be modified to take the additional weight of the hot tub or spa. Water is very heavy and decks are elevated. A concrete slab, for example, is often used. Lay out a perfect 8 foot square at the location you plan to build the deck. Measure a square using stakes and string on the ground. Adding a hot tub to your deck, however, requires careful planning. You essentially need to double the supports of the deck for it to hold a hot tub. Ask Question Asked 1 year, 4 months ago. If 7 people sit in my hot tub that is an additional 1050 lbs. See all of our free deck plans here. The hot tub will add about 100 PSF load to the normal live and dead loads. If the deck is too high to support the tub with a slab, analyze the deck framing with the Hot Tub in the worst places possible for each member. I am building a 10'X11' deck to support a hot tub. This lets you walk around the outside of the hot tub and create the illusion of more space. I’m to build a raised deck frame which will support a small (1.8m Lazy Spa hot tub). A hot tub deck must be able to support the weight of a hot tub, which is a considerably large load. Step 3 – Stake Out. A hot tub on the deck. So you must be sure that the deck is able to support the weight of a full tub. The Rule of Thumb. Now that you know how you can tell if you deck can support a hot tub. A new platform with large footings at least 22" in diameter should be installed below each corner of the tub … Dimensions of deck are 3m x2.4m. The hot tub in your photo will have an impact on the section of deck depicted in the diagram. I would obviously include many noggins. Step 1 Consult the manufacturer's documentation that came with the hot tub, or consult the supplier if you're going to build the deck before delivery, to learn the hot tub's maximum in-use weight. Viewed 62 times 0. I've been asked to build a 20' x 20' deck that will have a 4 to 6 person hot tub resting on top. Active 1 year, 3 months ago. Hot tub decking is exactly the same as all other decking – the difference is in the construction of the timber deck. 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