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RELATIVE DENSITY- COARSE-GRAINED SOILS <br /> Relative Density Standard Penetration Dames& Moore Sampler Dames& Moore Sampler <br /> Resistance (140-pound hammer) (300-pound hammer) <br /> Very Loose 0-4 0- 11 0-4 <br /> Loose 4- 10 1 1 - 26 4- 10 <br /> Medium Dense 10-30 26- 74 10- 30 <br /> Dense 30- 50 74- 120 30-47 <br /> Very Dense More than 50 More than 120 More than 47 <br /> CONSISTENCY- FINE-GRAINED SOILS <br /> Consistency Standard Penetration Dames& Moore Sampler Dames& Moore Sampler Unconfined Compressive <br /> Resistance (140-pound hammer) (300-pound hammer) Strength (tsf) <br /> Very Soft Less than 2 Less than 3 Less than 2 Less than 0.25 <br /> Soft 2 -4 3 -6 2 - 5 0.25 -0.50 <br /> Medium Stiff 4- 8 6- 12 5 -9 0.50- 1.0 <br /> Stiff 8- 15 12 -25 9- 19 1.0-2.0 <br /> Very Stiff 15 - 30 25 - 65 19- 31 ) 2.0-4.0 <br /> Hard More than 30 More than 65 More than 31 More than 4.0 <br /> PRIMARY SOIL DIVISIONS GROUP SYMBOL GROUP NAME <br /> CLEAN GRAVELS GW or GP GRAVEL <br /> GRAVEL (< 5%fines) <br /> GRAVEL WITH FINES GW-GM or GP-GM GRAVEL with silt <br /> (more than 50%of (> 5%and <_ 12%fines) GW-GC or GP-GC GRAVEL with clay <br /> coarse fraction <br /> COARSE GRAINED retained on GM silty GRAVEL <br /> SOILS <br /> No. 4 sieve) <br /> (> 12%fines)GRAVELS WITH FINES GC clayey GRAVEL <br /> GC-GM silty, clayey GRAVEL <br /> (more than 50% CLEAN SANDS <br /> retained on SAND (<5%fines) SW or SP SAND <br /> No. 200 sieve) SANDS WITH FINES SW-SM or SP-SM SAND with silt <br /> (50%or more of (> 5%and <_ 12%fines) SW-SC or SP-SC SAND with clay <br /> coarse fraction <br /> passing SM silty SAND <br /> No. 4 sieve) SANDS WITH FINES SC clayey SAND <br /> (> 12%fines) — <br /> SC-SM silty, clayey SAND <br /> ML SILT <br /> FINE-GRAINED CL CLAY <br /> SOILS Liquid limit less than 50 - <br /> CL-ML silty CLAY <br /> (50%or more SILT AND CLAY OL ORGANIC SILT or ORGANIC CLAY <br /> passing MH SILT <br /> No. 200 sieve) Liquid limit 50 or CH CLAY <br /> greater <br /> OH ORGANIC SILT or ORGANIC CLAY <br /> HIGHLY ORGANIC SOILS PT PEAT <br /> MOISTURE ADDITIONAL CONSTITUENTS <br /> CLASSIFICATION <br /> Secondary granular components or other materials <br /> Term Field Test such as organics, man-made debris,etc. <br /> Silt and Clay In: Sand and Gravel In: <br /> very low moisture, Percent Fine-Grained Coarse- Percent Fine-Grained Coarse- <br /> dry dry to touch Soils Grained Soils Soils Grained Soils <br /> moist damp,without < 5 trace trace < 5 trace trace <br /> visible moisture 5 - 12 minor with 5 - 15 minor minor <br /> visible free water, > 12 some silty/clayey 15 - 30 with with <br /> wet I usually saturated > 30 sandy/gravelly Indicate <br /> G EODESIGN SOIL CLASSIFICATION SYSTEM TABLE A-2 <br /> 15575 SW Sequoia Parkway-Suite 100 <br /> Portland OR 97224 <br /> Off 503.968.8787 Fax 503.968.3068 <br />