ᐅ Do exterior walls need to be positioned exactly in the center of the strip footing?
Created on: 10 Aug 2016 13:38
C
Chorus
Hello, since I am new here, I’m not sure if this question is posted in the right place, but I’ll give it a try.
We are currently waiting for a prefabricated house, for which we are doing the basement and the foundation slab ourselves, or with other companies than the house supplier.
Now I have a question about the foundations and the walls that will later be on top of them. I have seen some pictures online where the basement walls sit directly in the middle of the strip foundation, so there is a protruding edge all around.
With a 50cm (20 inch) wide foundation and a 24cm (9.5 inch) basement wall, this means the outer edge of the foundation protrudes about 13cm (5 inches) all around. Our earthwork contractor has now prepared the foundation formwork so that the basement walls will align exactly with the edge of the foundation. So I have a 50cm (20 inch) wide strip foundation where the 24cm (9.5 inch) basement walls will sit directly on the outer edge, and the remaining 26cm (10 inches) of the foundation will basically be inside the house.
Since the foundation and the slab are heavily reinforced and poured together, there should be no risk of tipping, cracking, or anything similar.
The strip foundation is 50cm (20 inch) wide and correspondingly deep. Under the load-bearing walls, there are also deeper foundation strips positioned centrally beneath the walls, and the rest of the slab is about 15cm (6 inch) thick.
Is this an acceptable way to do it, or what is your opinion?
I know that a structural engineer can calculate this best, but before commissioning a paid consultation, I wanted to ask generally what is considered “standard practice” in construction.
I hope you can help me or provide some clarity.
We are currently waiting for a prefabricated house, for which we are doing the basement and the foundation slab ourselves, or with other companies than the house supplier.
Now I have a question about the foundations and the walls that will later be on top of them. I have seen some pictures online where the basement walls sit directly in the middle of the strip foundation, so there is a protruding edge all around.
With a 50cm (20 inch) wide foundation and a 24cm (9.5 inch) basement wall, this means the outer edge of the foundation protrudes about 13cm (5 inches) all around. Our earthwork contractor has now prepared the foundation formwork so that the basement walls will align exactly with the edge of the foundation. So I have a 50cm (20 inch) wide strip foundation where the 24cm (9.5 inch) basement walls will sit directly on the outer edge, and the remaining 26cm (10 inches) of the foundation will basically be inside the house.
Since the foundation and the slab are heavily reinforced and poured together, there should be no risk of tipping, cracking, or anything similar.
The strip foundation is 50cm (20 inch) wide and correspondingly deep. Under the load-bearing walls, there are also deeper foundation strips positioned centrally beneath the walls, and the rest of the slab is about 15cm (6 inch) thick.
Is this an acceptable way to do it, or what is your opinion?
I know that a structural engineer can calculate this best, but before commissioning a paid consultation, I wanted to ask generally what is considered “standard practice” in construction.
I hope you can help me or provide some clarity.
I don’t think it’s wrong, because the insulation then goes all the way down to under the strip foundation. If there were an overhang there, a cove would have to be created first.
And no, I see three prefabricated houses without basements here, and in all of them, the house extends beyond the strip foundation.
By the way, in our case, the house also extends about 10cm (4 inches) beyond the basement. A membrane was attached to the basement, and then the insulation is installed on top of that.
And no, I see three prefabricated houses without basements here, and in all of them, the house extends beyond the strip foundation.
By the way, in our case, the house also extends about 10cm (4 inches) beyond the basement. A membrane was attached to the basement, and then the insulation is installed on top of that.
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