ᐅ Excerpt from Geotechnical Report: Soil Assessment and Recommendations
Created on: 19 Nov 2017 14:35
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Heiko123
Hello everyone,
I am new here and currently planning the construction of a semi-detached house in Lower Saxony. For this, I had a soil survey carried out on my property. Unfortunately, I cannot determine from the report whether to expect significant additional costs.
Here is the excerpt from the soil report:
5. Soil Assessment and Recommendations
The silt and silty clay layers present are sensitive to settlement. A foundation on a reinforced concrete slab is recommended, which can compensate for potential differential settlements due to varying load distribution.
The topsoil must be removed and replaced with a sand bedding made of fill sand, which should be compacted in layers to 98% of the standard Proctor density.
The building foundation can then be placed on a reinforced concrete slab designed using a subgrade modulus of
Calcium silicate brick = 8 MN/m³ (MegaNewtons per cubic meter).
The slab must be equipped with a frost protection edge.
In load-bearing areas, the design bearing pressure should not exceed
σR,d = 140 kN/m² (kiloNewtons per square meter).
Settlements of approximately 1.5–2 cm (0.6–0.8 inches) are to be expected.
Could someone please help me understand this?
Thank you
Heiko
I am new here and currently planning the construction of a semi-detached house in Lower Saxony. For this, I had a soil survey carried out on my property. Unfortunately, I cannot determine from the report whether to expect significant additional costs.
Here is the excerpt from the soil report:
5. Soil Assessment and Recommendations
The silt and silty clay layers present are sensitive to settlement. A foundation on a reinforced concrete slab is recommended, which can compensate for potential differential settlements due to varying load distribution.
The topsoil must be removed and replaced with a sand bedding made of fill sand, which should be compacted in layers to 98% of the standard Proctor density.
The building foundation can then be placed on a reinforced concrete slab designed using a subgrade modulus of
Calcium silicate brick = 8 MN/m³ (MegaNewtons per cubic meter).
The slab must be equipped with a frost protection edge.
In load-bearing areas, the design bearing pressure should not exceed
σR,d = 140 kN/m² (kiloNewtons per square meter).
Settlements of approximately 1.5–2 cm (0.6–0.8 inches) are to be expected.
Could someone please help me understand this?
Thank you
Heiko
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Osnabruecker8 Jan 2021 11:02Heiko123 schrieb:
that we are not allowed to build on the plot for 5 years.The team seems to have a sense of humor... 😉
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Pumpernickel17 Sep 2021 23:51Heiko123 schrieb:
Hi everyone,
It’s been a long time. Thanks again for your responses. Back then, the plan was to build with Team Massivhaus. The contract had already been signed.
After we submitted the aforementioned report (we built without a basement), Team Massivhaus informed us that due to the ground conditions, approximately €35,000 (about $37,000) in additional costs would arise—for a reinforced beam grid with cross beams. This did not align with the geologist’s report, who prepared the investigation, nor with the information from a well-known builder or your own statements.
Therefore, we withdrew from the contract with Team Massivhaus and fortunately built in 2018 with local craftsmen.
So always be careful about what extra costs construction companies try to impose on you.
Best regards
Heiko Hello,
Very interesting article from you.
I am currently dealing with this topic, specifically the high fees demanded by TM after the soil report. I have already heard from several homeowners that TM adds quite a markup here. During a verbal conversation with the salesperson, he assured me that earthwork could also be fully subcontracted externally if TM’s prices were too high. Is this true, or are these just “empty promises,” since nothing is stated in writing, and you would be forced to accept the high costs?
Hi,
we were offered to outsource the earthworks. However, there are two important points to consider:
1. The payment offered by Team Massivhaus to exclude this item is very low, so higher additional costs should be expected.
2. Only the outsourcing of the groundwork is possible, not the construction of the concrete slab. Therefore, the high additional costs announced by Team Massivhaus would still have occurred.
For me, managing individual contracts under the supervision of a local contractor was clearly the best option. In terms of quality, we are well above the standard of typical general contractors, and probably even below their prices. This was of course also due to the countless hours of own work invested.
Best regards
we were offered to outsource the earthworks. However, there are two important points to consider:
1. The payment offered by Team Massivhaus to exclude this item is very low, so higher additional costs should be expected.
2. Only the outsourcing of the groundwork is possible, not the construction of the concrete slab. Therefore, the high additional costs announced by Team Massivhaus would still have occurred.
For me, managing individual contracts under the supervision of a local contractor was clearly the best option. In terms of quality, we are well above the standard of typical general contractors, and probably even below their prices. This was of course also due to the countless hours of own work invested.
Best regards
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