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In a 3 story, 3650 sq ft 5 bedroom house, just developed a…

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In a 3 story, 3650...
In a 3 story, 3650 sq ft 5 bedroom house, just developed a 2 mm wide crack across the entire concrete slab in the basement floor, and one far corner of the concrete slab has a thinner crack diagonally across the corner, with the back triangular corner section slightly depressed. ( We've had lots of rain this year in Wisconsin. ) Is a structural engineer the one to consult about this, and what do their services usually cost? If not a S.E., who would we call?
Submitted: 3 years ago.Category: Structural Engineering
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6/19/2015
Structural Engineer: StructuralEng, Consultant replied 3 years ago
StructuralEng
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Category: Structural Engineering
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HelloHow are you doing? I'll be happy to assist you.
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Structural Engineer: StructuralEng, Consultant replied 3 years ago
Yes, a structural engineer is who you want to consult for this. It could be settlement from too much moistureHow old is the home?
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Customer reply replied 3 years ago

Built in 1996

Structural Engineer: StructuralEng, Consultant replied 3 years ago
How long ago did you notice the crack?
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Customer reply replied 3 years ago

It just appeared in the Spring. We had a relatively dry winter, for us, with not much snow. Very cold. Then a very wet spring. We are on the very edge of a marsh, near springs and a spring -fed creek that feeds into Lake Mendota, one of 4 large lakes here in Wisconsin, if that helps. Our house is the lowest in our development, in a bowl-shaped depression in a hillside.

Structural Engineer: StructuralEng, Consultant replied 3 years ago
Is the concrete exposed or you have a finished floor over it?
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Customer reply replied 3 years ago

Exposed in this half of the sublevel ( not full, below ground basement. ) Other half is finished ( carpeted. )

Structural Engineer: StructuralEng, Consultant replied 3 years ago
The other possibility would be shrinkage cracking, but it doesn't sound like that is the case if it just developed after 20 years.It is likely having to do with excessive moisture and possible expansive soils or settlement due to the high moisture and then drying out.
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Customer reply replied 3 years ago

Alright, thank you. We'll look for a reputable structural engineer to assess it.

Structural Engineer: StructuralEng, Consultant replied 3 years ago
No problem. I'm happy to help. Good luck with your project.
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Structural Engineer: StructuralEng, Consultant replied 3 years ago
Take care.
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