Foundation Contractors
Napa Valley, Napa, County, San Francisco North Bay, Ca. USA

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Foundations are designed to have an adequate load capacity

with limited settlement by a geotechnical engineer, and the foundation itself is designed structurally by a structural engineer.

The primary design concerns are settlement and bearing capacity. When considering settlement, total settlement and differential settlement is normally considered. Differential settlement is when one part of a foundation settles more than another part. This can cause problems to the structure the foundation is supporting. It is necessary that a foundation is not loaded beyond its bearing capacity or the foundation will "fail".

Other design considerations include scour and frost heave. Scour is when flowing water removes supporting soil from around a foundation (like a pier supporting a bridge over a river). Frost heave occurs when water in the ground freezes to form ice lenses.

Changes in soil moisture can cause expansive clay to swell and shrink. This swelling can vary across the footing due to seasonal changes or the effects of vegetation removing moisture. The variation in swell can cause the soil to distort, cracking the structure over it.


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Alphabetical Listings

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Baldry Brothers Drilling
2008 Tokay St, Santa Rosa, CA 2707 665-0505

Barone Construction & Drilling
3696 Petaluma Blvd N, Petaluma, CA 707 765-1184

Brian Jones Construction
58 Juniper Dr, Napa, CA 707 226-3450

Connor Brothers Construction
816 3rd St, Napa, CA 707 257-0545

M R Construction Svc
1937 Dawnview Pl, Fairfield, CA 510-812-5636

Mc Crea Construction
130 Prestwick Ct, Vallejo, CA 707 553-1313

Vaca Foundations Inc
PO Box 282, Vacaville, CA 707 448-9734

Valentine Corp
111 Pelican Way, San Rafael, CA 415 453-3732

Versaggi Construction
3144 Lovall Valley Rd, Sonoma, CA 707 996-5033
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