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365 kilos for the tub empty. 1,525 kilos for 1,525 liters of water 320 kilos for 4 people @ 80 kilos each. 2,210 kilos total on a 3.2 sq m space is about 700 kilos/sq meter. Does my math look right? Do you think your deck will hold that kind of weight?Please double-check my math; I'm an American and I don't do much metrically.
Karl,Here's a link to a forum I follow every so often http://www.handymanwire.com/ubbthreads/ubbthreads.php?Cat=. I'd suggest you post on the the Handyman section. One of the moderators is Clint Robbins. He's an engineer and I'm sure he'll be able to tell you how much more support you'll need. Others will have good advice as well.If I may suggest, post in feet, inches and pounds, not metrically and not in yards. Sorry but we Americans just don't do metrically very well at all. And convention here is to use fractions, not decimals. By the way, how do you guys measure lumber? Over here, what we call a 2x4 doesn't measure 2" x 4" but 1-1/2" x 3-1/2". That will make a difference in the load calculations.Not a problem, Tattooed Lady. I kind of got used to the metric system in my Peace Corps days in Costa Rica. Nowadays, I kind of dabble in it, selling metric taps, dies, drill bits and the like.Jim
I'd like to place the tub on the deck outside the house. Since the tub is quite heavy, the question is: Is it strong enough?Construction is as follows: (Sorry if I don't use the proper terminology )Concrete plinths appx. every 2,5 yards along 2x8" beams. The bottom beams are appx 2,5 yards apart.On top of that, 2x6" floorbeams 24 inches apart. Last is the deck floor boards, 4,8 inches wide and just over an inch thick. (28mm, an inch is appx. 25 mm.)
Put another beam just like that one for the other side of the tub. Double up the 2x6 joists between the 2 beams under where the tub is going to be.And I am a little concerned about that 90 inch span between posts on a single header. I'd like to see another post in there, or a double 2x8. And are those concrete footings or just blocks?