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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />METHOD OF SOIL CLASSIFICATION <br />MAJOR DIVISIONS <br />SYMBOLS <br />TYPICAL NAMES <br />GRAIN SIZE <br />CLASSIFICATION <br />G w <br />SIEVE SIZE <br />WELL GRADED GRAVELS OR GRAVEL -SAND MIXTURES LITTLE OR NO FINES <br />BOULDERS <br />GRAVELS <br />ABOVE 13' <br />COBBLES <br />i2' TO 3' <br />305 TO 762 <br />Q <br />3' TO NO 4 <br />762 TO 476 <br />COARSE <br />GP <br />°n <br />POORLY GRADED GRAVELS OR GRAVEL -SAND MIXTURES. LITTLE OR Na FINES <br />E3 <br />191 TO 476 <br />SAND <br />NO 4 TO NQ 200 <br />4760 TO 0074 <br />COARSE <br />NO 4 TO NO. 10 <br />4 760 TO 2000 <br />{/7 " <br />A 9 <br />(MORE Tww 1/2 OF <br />CWSE rmcnDN ) <br />GM <br />FINE <br />SILTY GRAVELS, GRAVEL -SAND -SILT MIXTURES <br />0 420 TO 0 074 <br />o <br />BELOW NO 200 <br />Lj <br />NO. 4 SIEVE SIZE) <br />Z_ <br />GC <br />c <br />CLAYEY GRAVELS. GRAVEL -SAND -CLAY MIXTURES <br />J <br />W <br />WELL GRADED SANDS CR GRAVELY SANDS LITTLE OR NO FINES <br />SANDS <br />s„- <br />w m <br />LJ <br />V) = <br />SP <br />POORLY GRADED SANDS OR GRAVELY SANDS, LITTLE OR N13 FINES <br />CC <br />Q � <br />C] W <br />U °I <br />(MDRE THAN V2 DF <br />SM <br />SILTY SANDS, SAND -SILT MIXTURES <br />CDA2SE FRACTIIIN <br />lID. ♦ SIEVE SIZE) <br />SC <br />CLAYEY SANDS, SAND -CLAY MIXTURES <br />ML <br />INORGANIC SILTS AND VEFINE SANDS, ROCK FLOWER SILTY OR CLAYEY <br />W <br />SILTS & CLAYS <br />FINE SANDS OR CLAYEY SILRY TS WITH SLIGHT PLASTICITY <br />C7 H <br />CL <br />INORGANIC CLAYS OF LOW TO MEDIUM PLASTICITY GRAVELY CLAYS <br />V) <br />SANDY CLAYS, SILTY CLAYS LEAN CLAYS <br />LL<50 <br />LJi <br />O L <br />ORGANIC SILTS AND ORGANIC SILTY CLAYS OF LOW PLASTICITY <br />Z <br />Q S <br />MH <br />INORGANIC SILTS MICACEOUS OR DIATOMACECOUS FINE SANDY OR SILTY <br />L <br />SOILS ELASTIC SILTS <br />SILTS CLAYS <br />Lvz <br />CH <br />INORGANIC CLAYS OF HIGH PLASTICITY FAT CLAYS <br />z <br />LL>50 <br />OH <br />ORGANIC CLAYS OF MEDIUM TO HIGH PLASTICITY ORGANIC SILTY CLAYS. <br />L:ii <br />ORGANIC SILTS <br />HIGHLY ORGANIC SOILS <br />Pt <br />PEAT AND OTHER HIGHLY ORGANIC SOILS <br />CLASSIFICATI❑N CHART <br />( UNIFIED SOIL CLASSIFICATION SYSTEM ) <br />GRAIN SIZE CHART <br />+ NUMBER OF BLOWS OF 140 POUND HAMMER FALLING 30 INCHES TO DRIVE A <br />2 INCH 00 (1-3/8 INCH ID) SPLIT SPOON (ASTM D-1580 <br />SANDS AND GRAVELS <br />RANGE OF GRAIN SIZES <br />US. STANDARD <br />GRAIN SIZE <br />CLASSIFICATION <br />4 - 10 <br />SIEVE SIZE <br />IN MILLIMETERS <br />BOULDERS <br />ABOVE 12' <br />ABOVE 13' <br />COBBLES <br />i2' TO 3' <br />305 TO 762 <br />GRAVEL <br />3' TO NO 4 <br />762 TO 476 <br />COARSE <br />3' TO 1/4' <br />762 TO 191 <br />FINE <br />3/4 TO NO. 4 <br />191 TO 476 <br />SAND <br />NO 4 TO NQ 200 <br />4760 TO 0074 <br />COARSE <br />NO 4 TO NO. 10 <br />4 760 TO 2000 <br />MEDIUM <br />NO. 10 TO NO. 40 <br />2000 TO 0 420 <br />FINE <br />NO. 40 TO NO 200 <br />0 420 TO 0 074 <br />LSELTECLAY <br />BELOW NO 200 <br />BELOW 0074 <br />GRAIN SIZE CHART <br />+ NUMBER OF BLOWS OF 140 POUND HAMMER FALLING 30 INCHES TO DRIVE A <br />2 INCH 00 (1-3/8 INCH ID) SPLIT SPOON (ASTM D-1580 <br />SANDS AND GRAVELS <br />BLOWS/FOOT <br />VERY LOOSE <br />0 - 4 <br />LOOSE <br />4 - 10 <br />MEDIUM DENSE <br />IO - 30 <br />DENSE <br />30 - 50 <br />VERY DENSE <br />OVER 50 <br />RELATIVE DENSITY <br />SILTS AND CLAYS <br />BLOWS/FOOT <br />VERY SOFT <br />0 - 2 <br />SOFT <br />2 - 4 <br />MEDIUM STIFF <br />4 - 8 <br />STIFF <br />8 - 16 <br />VERY STIFF <br />16 - 32 <br />HARD <br />OVER 32 <br />CONSISTENCY <br />PAGE [IF <br />