Laserfiche WebLink
MAJOR DIVISIONS SYMBOLS TYPICAL NAMES <br /> GW Well-graded gravels or graveli sand mixtures, little or no fines <br /> GRAVELS <br /> 0..—o GP Poorly graded gravels of grariiel-sand mixtures, little or no fines <br /> Z <br /> Ip a'� (More than % of coarse GM Silty gravels, gravel-sand-silt'mixtures <br /> Lu 0 fraction:-no.4 sieve size) <br /> a c GC Clayey gravels,gravel-sand-Clay mixtures <br /> Cr M-o <br /> O E N SW Well-graded sands or gravelly sands, little or no fines <br /> Uj(na o SANDS <br /> L a: c SP Poorly graded sands or gravelly sands, little or no fines <br /> Q "A (More than !4 of coarse <br /> Utraaiancno.asievesize) SM Silty sands.sand-silt mixtures <br /> SC Clayey sands.sand-clay mixtures <br /> L ML Inorganic silts and very fine sands,rock flour,siltyor clayey fine sands orclayey <br /> slight plasticity �� y y siltswith <br /> o y N SILTS & CLAYS <br /> N-a H CL Inorganic clays of low to medium plasticity, gravelly clays, sandy clays, silty clays, <br /> � _ <br /> LL C 50 lean clays <br /> Q z �' OL Organic silts and organic sit ty clays of low pi <br /> asticity <br /> 0 <br /> o <br /> Cr <br /> l <br /> CW Cm "' MH Inorganic silts, micaceous or diatomaceous fine sandy or silty soils,elastic silts <br /> w o` <i SILTS & CLAYS <br /> U. v LL $0 CH Inorganic clays of high plasticity, fat clays <br /> OH Organic clays of medium to high plasticity, organic silty clay, organic silts <br /> L r HIGHLY ORGANIC SOILS Pt Peat and other highly organiclsoils <br /> I <br /> UNIFIED SOIL CLASSIFICATION SYSTEM <br /> COHESIVE SOILS GRANULAR SOILS CLASSIFICATION RANGE OF GRAIN SIZES <br /> Description Slows/ft. Description Blows/ft. <br /> Grain Type U.S. Stancard Grain Size <br /> very soft < 2 very loose 4 Sieve Size in Millimeters <br /> soft2 — 4 loose C Boulders above 12" above 305 <br /> i� 5- 10— 10 <br /> Cobbiesll 12"to 3" 305 to 76.2 <br /> medium(firm) 5-8 medium dense 11 -30 t <br /> stiff Gravel 1� 3"to no. a <br /> 9— 1 5 dense 31 -5 0 coarse (c) 3"to V 76.2 to 4.76 <br /> 76.2 to ts.t <br /> very stiff 1 6— 0 very <br /> dense fine Ili Y.'to no.a <br /> 3 ry ] 50. ts.t to 4.76 <br /> hard > 30 Sand 11 no.4 to no. 200 4.76 to 0.074 <br /> L (m)Coerse (c) no.4 to no. 10 4.76 to 2.00 <br /> metliurn <br /> no. 10 to no.40 <br /> fine 01no.40 to no.200 O..800 tto .420 <br /> CONSISTENCY CLASSIFICATION <br /> Silt &Clay below no. 200 below Q.074 <br /> GRAIN SIZE CLASSIFICATION <br /> _ 60 <br /> X 50 <br /> W <br /> Q40 CH <br /> Z \ <br /> � 30 <br /> U ` <br /> F <br /> ILa 20 CL CH <br /> CL 10 F4H <br /> 7 <br /> 4 SIL &OL <br /> 0 10 20 30 40 50 60 70 80 90 100 •.� <br /> PLASTICITY CHART i <br />