Page 203 - Masonry and Concrete

Footings, Foundation Walls, Basements, and Slabs

Volume Change Potential Expansion 2 Low Low Low Low Low Low Low Low Low Medium to Low High High Medium High High One and Two-Family

Frost Heave Potential Low Low Low Low Medium Medium Medium Medium High Medium Medium High Medium Medium Medium

Drainage 1 Good Good Good Good Good Good Medium Medium Medium Medium Poor Poor Poor Unsatisfactory Unsatisfactory (from Council of American Building Officials

Well-graded gravels, gravel sand mixtures, little or no fines
Poorly graded sands or gravelly sands, little or no fines
Well-graded sands, gravelly sands, little or no fines

Poorly graded gravels or gravel sand mixtures,

Silty gravels, gravel-sand-silt mixtures Silty sand, sand-silt mixtures Clayey gravels, gravel-sand-clay mixtures Clayey sands, sand-clay mixture Inorganic silts and very fine sands, rock flour, silty or clayey fine sands, or clayey silts with slight plasticity Inorganic clays of low to medium plasticity, gravelly clays, sandy clays, silty clays, lean clays Inorganic clays of

Soil Description little or no fines or silty soils, elastic silts Properties of soils classified according to the Unified Soil Classification System

Classification System Symbol GW GP SW SP GM SM GC SC ML CL CH MH OL OH Pt in. per hour. Falls Church, VA).

1. 2. FIGURE 6-13

Soil Group Group I Group II Group III Group IV Notes: Dwelling Code,,

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