Hello,
I know there are already other threads addressing the topic, but no answers were satisfactory in them, so I'm creating a new one with my circumstances.
I'm in the process of furnishing the upper floor of my Älvsbyhus, and only have the bathroom left. We were thinking of having a whirlpool bath there and have contacted Älvsbyhus to see what the joist can withstand. I received the answer that the joist was designed for 200kg/sq m.
It's just on the edge of us making it. The models we've looked at are larger. The ones we're considering are 300-450 liters, and a bathtub is just over 1 sq m.
Therefore, I'm wondering if it can be reinforced without major interventions, or by choosing smart placements.
Here's what I'm thinking:
I build a raised platform with beams (120x45 or 145x45) that are laid perpendicular over at least 5 floor joists. This "raised platform" is then placed directly above the load-bearing wall. You might be able to add cross-pieces between the beams.
What do you think about this? Then you distribute the weight over a larger area, and it becomes easy to reduce to 200kg/sq m, and it should be most stable over the load-bearing wall.
I know there are already other threads addressing the topic, but no answers were satisfactory in them, so I'm creating a new one with my circumstances.
I'm in the process of furnishing the upper floor of my Älvsbyhus, and only have the bathroom left. We were thinking of having a whirlpool bath there and have contacted Älvsbyhus to see what the joist can withstand. I received the answer that the joist was designed for 200kg/sq m.
It's just on the edge of us making it. The models we've looked at are larger. The ones we're considering are 300-450 liters, and a bathtub is just over 1 sq m.
Therefore, I'm wondering if it can be reinforced without major interventions, or by choosing smart placements.
Here's what I'm thinking:
I build a raised platform with beams (120x45 or 145x45) that are laid perpendicular over at least 5 floor joists. This "raised platform" is then placed directly above the load-bearing wall. You might be able to add cross-pieces between the beams.
What do you think about this? Then you distribute the weight over a larger area, and it becomes easy to reduce to 200kg/sq m, and it should be most stable over the load-bearing wall.
If you place the bathtub over the load-bearing wall, it shouldn't be a problem. It's true that the design breaking load is 200kg/m2, but often it's the service load that is "designing" (deflection, bounce) for a wooden floor, which is why the joist can handle a higher load. Älvsbyhus uses Kerto beams with slightly different thicknesses in their floors. Do you have a sketch of where you plan to place the bathtub, including the load-bearing wall on the ground floor? What does the provided detailed drawing say about the dimensions of the Kerto beams? A little more info and I can help with a simple calculation.
Oh thank you.
I don't have any drawings with me right now because I'm away working. I’ll be back home on Tuesday, then I'll post a sketch and the dimensions.
But don't you think that my idea of placing joists crosswise would help distribute the load?
Thanks in advance!
I don't have any drawings with me right now because I'm away working. I’ll be back home on Tuesday, then I'll post a sketch and the dimensions.
But don't you think that my idea of placing joists crosswise would help distribute the load?
Thanks in advance!
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I have checked the drawings I have access to, and unfortunately, they are not very detailed.
It is indeed kertobalks. The dimensions are 30-42 x 260mm and they are placed at c/c 600-660.
The span is 8 meters.
However, the dimension and c/c where I plan to place the bathtub cannot be seen anywhere.
The supporting wall is not in the middle of the floor structure but directly under the intended location of the bathtub.
What do you think, you who are good with calculations?
It is indeed kertobalks. The dimensions are 30-42 x 260mm and they are placed at c/c 600-660.
The span is 8 meters.
However, the dimension and c/c where I plan to place the bathtub cannot be seen anywhere.
The supporting wall is not in the middle of the floor structure but directly under the intended location of the bathtub.
What do you think, you who are good with calculations?
Checked the link and it didn't say much.
The question is whether I dare load the floor structure with maybe up to 500kg on 1 - 1.5 sqm, if I do it over the load-bearing wall.
And the second question was whether one could consider laying beams across the floor structure and thus assume the weight is distributed over 2.5 sqm, in which case it would meet the calculated 200kg/sqm that the manufacturer says the floor is designed for.
The question is whether I dare load the floor structure with maybe up to 500kg on 1 - 1.5 sqm, if I do it over the load-bearing wall.
And the second question was whether one could consider laying beams across the floor structure and thus assume the weight is distributed over 2.5 sqm, in which case it would meet the calculated 200kg/sqm that the manufacturer says the floor is designed for.