Hello
I am planning to build a deck on which I intend to place a hot tub. The general recommendation on the forum seems to be to place the tub on the ground and build the deck around it, but that doesn't work for me since the surface is an uneven rock.
My idea was to cast footings directly against the rock as a base for the deck, which leads me to two questions.
1) Am I thinking correctly?
2) How should the footings, reinforcement, carrier beams, and joists be dimensioned?
The tub is 193 cm in diameter and it seems reasonable to assume it weighs 2000 kg when full of water and people. 660 kg/sqm in other words. The tub hardly distributes its weight evenly over the entire area, so I need a bit of a margin.
The deck is intended to be 2.5 x 3.5 m.
Grateful for help
Jakob
I am planning to build a deck on which I intend to place a hot tub. The general recommendation on the forum seems to be to place the tub on the ground and build the deck around it, but that doesn't work for me since the surface is an uneven rock.
My idea was to cast footings directly against the rock as a base for the deck, which leads me to two questions.
1) Am I thinking correctly?
2) How should the footings, reinforcement, carrier beams, and joists be dimensioned?
The tub is 193 cm in diameter and it seems reasonable to assume it weighs 2000 kg when full of water and people. 660 kg/sqm in other words. The tub hardly distributes its weight evenly over the entire area, so I need a bit of a margin.
The deck is intended to be 2.5 x 3.5 m.
Grateful for help
Jakob
Bolt into the rock for posts, frame with rough lumber, and place the barrel on it, just make sure you can access any drain tap, better to step down than to have a ladder up.
Thank you!
That's roughly what I had in mind. Do you have any sense of whether I need to build in one or two compartments? Suitable plinth distance? Definition of "grovt virke"? It's the first time I'm trying to dimension something that's not completely standard, so I'm quite at a loss
That's roughly what I had in mind. Do you have any sense of whether I need to build in one or two compartments? Suitable plinth distance? Definition of "grovt virke"? It's the first time I'm trying to dimension something that's not completely standard, so I'm quite at a loss
How it will look with the bottom of the barrel depends entirely on what is stated in the manual, should it have support all around and a solid bottom, or are there posts on it that can support everything
This must be clear first, then no problem with arranging the bottom for it
This must be clear first, then no problem with arranging the bottom for it
It should have support under 5 beams that go across the bottom of the barrel:
https://shopcdn.textalk.se/shop/ws84/50884/art91/36079291-aff670-Badtunna_Comfort.PDF
Can of course have corresponding beams in the decking directly under these. It's probably good even if it ends up with slightly odd center-to-center measurements...
https://shopcdn.textalk.se/shop/ws84/50884/art91/36079291-aff670-Badtunna_Comfort.PDF
Can of course have corresponding beams in the decking directly under these. It's probably good even if it ends up with slightly odd center-to-center measurements...
Then the only question is, should you have it halfway down in the trall or completely on top? What is the depth between the trall and the rock, does half the barrel fit at the shallowest spot?
Interesting idea! Now I understand what you meant by preferring to step down rather than up. Unfortunately, the shallowest point will be under the barrel, which is why on top of the decking is the only solution.
There is then no space below then, not even a decimeter, I do not intend to change your plans, but is it possible to build a little more in size on the deck and move the placement of the barrel? Think about it if it is possible, it depends on what the government says, a consultation meeting is not wrong.
Hello
That will be quite a big load. How high is the barrel? Not sure about 20kN?
If it's like you say, equivalent to 6.6kN/m2, that's a lot. About 3 times more than for floors/ceilings...
One might also assume that the consequence of breaking could be a bit dangerous?
To handle 6.6kN/m2
You need approximately, with acceptable deflection and some safety, about 220x45 s250, if you want to handle it with simply supported spans of 2.5m, i.e. without intermediate support.
This results in point loads at the beam ends that are very small, which is why they can be laid on Berlinor with columns at, for example, 1.0 m distance that are quite small if they're not high...
It might be more sensible to handle the load from the hot tub at specified points with concrete columns and then build a deck around it...
Regards, Alex
That will be quite a big load. How high is the barrel? Not sure about 20kN?
If it's like you say, equivalent to 6.6kN/m2, that's a lot. About 3 times more than for floors/ceilings...
One might also assume that the consequence of breaking could be a bit dangerous?
To handle 6.6kN/m2
You need approximately, with acceptable deflection and some safety, about 220x45 s250, if you want to handle it with simply supported spans of 2.5m, i.e. without intermediate support.
This results in point loads at the beam ends that are very small, which is why they can be laid on Berlinor with columns at, for example, 1.0 m distance that are quite small if they're not high...
It might be more sensible to handle the load from the hot tub at specified points with concrete columns and then build a deck around it...
Regards, Alex