Hello.
I had a soil report prepared. It states:
"To accommodate settlements / differential settlements of up to 1.5 cm (0.6 inches), a design value for the bearing pressure (Eurocode 7) of 200 kN/m² (18.6 kips/ft²) can be assumed for an effective foundation width of 1.0 m (3.3 ft).
The foundation slab should be designed based on an elastic subgrade. For the design of the foundation slab using a design bearing pressure of 140 kN/m² (13.0 kips/ft²), a subgrade modulus of 9.5 MN/m³ (0.55 kip/in³) should be applied."
In my construction contract, the clause reads:
"The calculation basis is a permissible existing soil pressure of 150 kN/m² (14.0 kips/ft²) and a subgrade modulus of 20 MN/m³ (1.15 kip/in³)."
What does this mean for me?
I had a soil report prepared. It states:
"To accommodate settlements / differential settlements of up to 1.5 cm (0.6 inches), a design value for the bearing pressure (Eurocode 7) of 200 kN/m² (18.6 kips/ft²) can be assumed for an effective foundation width of 1.0 m (3.3 ft).
The foundation slab should be designed based on an elastic subgrade. For the design of the foundation slab using a design bearing pressure of 140 kN/m² (13.0 kips/ft²), a subgrade modulus of 9.5 MN/m³ (0.55 kip/in³) should be applied."
In my construction contract, the clause reads:
"The calculation basis is a permissible existing soil pressure of 150 kN/m² (14.0 kips/ft²) and a subgrade modulus of 20 MN/m³ (1.15 kip/in³)."
What does this mean for me?
B
Bauexperte15 Nov 2015 23:10Good evening,
I didn’t respond to your private message because I am neither a geologist nor a structural engineer, nor do I have any idea what kind of house you want to build, with which materials, and in what location; plus, I simply didn’t have time. All of this is essential for a reliable cost estimate; rough guesses won’t help you.
You should have checked the foundation recommendations in the soil report or, if you couldn’t read or understand it, called the geologist.
Then you shouldn’t have signed. Although, in my opinion, it doesn’t really matter; if you already own the plot, the extra foundation costs will come to you anyway.
Best regards, Bauexperte
cumpa schrieb:
hmm....
I didn’t respond to your private message because I am neither a geologist nor a structural engineer, nor do I have any idea what kind of house you want to build, with which materials, and in what location; plus, I simply didn’t have time. All of this is essential for a reliable cost estimate; rough guesses won’t help you.
You should have checked the foundation recommendations in the soil report or, if you couldn’t read or understand it, called the geologist.
cumpa schrieb:
I signed the construction contract today......and the seller couldn’t tell me anything about the soil report. He said I should wait until the site management/structural engineer reviews it...
I don’t have a good feeling about this
Then you shouldn’t have signed. Although, in my opinion, it doesn’t really matter; if you already own the plot, the extra foundation costs will come to you anyway.
Best regards, Bauexperte
I had everything reviewed by a building expert. From the offer to the construction specification and even the contract review, which was done by a lawyer.
So far, I have not received any negative reports regarding ground issues.
I came across these values myself and thought there might be discrepancies between the calculation basis and the geologist’s figures.
I will contact my geologist again tomorrow.
Thank you, Bauexperte, and thank you, Sarius, for the answers.
So far, I have not received any negative reports regarding ground issues.
I came across these values myself and thought there might be discrepancies between the calculation basis and the geologist’s figures.
I will contact my geologist again tomorrow.
Thank you, Bauexperte, and thank you, Sarius, for the answers.