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el METHOD OF SOIL CLASSIFICATION <br />MAJOR DIVISIONS <br />SYMBOLSI <br />TYPICAL NAMES <br />GRAIN SIZE <br />CLASSIFICATION <br />GW <br />SIEVE SIZE <br />WELL GRADED GRAVELS OR GRAVEL -SAND MIXTURES LITTLE OR N13 FINES <br />BOULDERS <br />GRAVELS <br />ABOVE 13' <br />COBBLES <br />12' TO 3' <br />305 TO 762 <br />GRAVEL <br />3 TO MO. 4 <br />J <br />COARSE <br />GP <br />762 TO 191 <br />POORLY GRADED GRAVELS OR GRAVEL -SAND MIXTURES LITTLE OR NO FINES <br />Q = <br />191 TO 476 <br />SAND <br />NO 4 TO NO. 200 <br />4760 TD 0074 <br />C13ARSE <br />NEI 4 TO N0. tO <br />4 760 TO 2000 <br />Q $ <br />(MINE Tl-" V2 OF <br />COARSE FRACTION > <br />jM <br />FINE <br />SILTY GRAVELS, GRAVEL -SAND -SILT MIXTURES <br />0 420 TO 0074 <br />o <br />BELOW NO 200 <br />LJ <br />NO. 4 SIEVE SIZE) <br />Z „ <br />G C <br />G <br />CLAYEY GRAVELS, GRAVEL -SAND -CLAY MIXTURES <br />J <br />0/��5Q45 <br />H <br />�V�t� <br />LD <br />S w <br />WELL GRADED SANDS OR GRAVELY SANDS. LITTLE OR NO FINES <br />SANDS <br />LJ a <br />C7 ^ <br />Sp <br />x <br />POORLY GRADED SANDS OR GRAVELY SANDS, LITTLE OR NO FINES <br />ixQ <br />0, <br />U ° <br />(MORE THAN 1/2 OF <br />SM <br />SILTY SANDS, SAND -SILT MIXTURES <br />CONtSE FRACTIOM < <br />NIL 4 StCVr SIZD <br />SC <br />CLAYEY SANDS, SAND -CLAY MIXTURES <br />ML <br />INORGANIC SILTS AND VERY FINE SANDS ROCK FLOWER. SILTY OR CLAYEY <br />- W <br />SILTS & CLAYS <br />1: <br />FINE SANDS OR CLAYEY SILTS WITH SLIGHT PLASTICITY <br />Q ,, <br />CL <br />INORGANIC CLAYS OF LOW TO MEDIUM PLASTICITY GRAVELY CLAYS <br />"I <br />LL<50 <br />SANDY CLAYS; SILTY CLAYS, LEAN CLAYS <br />ORGANIC SILTS AND ORGANIC SILTY CLAYS OF LOW PLASTICITY <br />Li <br />z <br />Z5 <br />MH <br />INORGANIC SILTS MICACEOUS OR DIATOMACECOUS FINE SANDY OR SILTY <br />pLi b <br />SOILS ELASTIC SILTS <br />Lo N <br />SILTS S CLAYS <br />Li3 z <br />CH <br />INORGANIC CLAYS OF HIGH PLASTICITY FAT CLAYS <br />LL>5Q <br />I� $ <br />OH <br />ORGANIC CLAYS OF MEDIUM TO HIGH PLASTICITY ORGANIC SILTY CLAYS, <br />ORGANIC SILTS <br />HIGHLY ORGANIC SOILS <br />Pt <br />PEAT AND OTHER HIGHLY ORGANIC SOILS <br />CLASSIFICATION CHART <br />C UNIFIED SOIL CLASSIFICATION SYSTEM ) <br />elGRAIN SIZE CHART <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 t2' <br />ABOVE 13' <br />COBBLES <br />12' TO 3' <br />305 TO 762 <br />GRAVEL <br />3 TO MO. 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 NO. 200 <br />4760 TD 0074 <br />C13ARSE <br />NEI 4 TO N0. tO <br />4 760 TO 2000 <br />MEDIUM <br />NO. 10 TO NO. 40 <br />Z 000 TO 0 420 <br />FINE <br />NO. 40 TO NO 200 <br />0 420 TO 0074 <br />SILT & CLAY <br />BELOW NO 200 <br />BELOv 0074 <br />elGRAIN SIZE CHART <br />SANDS AND GRAVELS <br />BLI3VS/F013T <br />VERY LOOSE <br />0 - 4 <br />LOOSE <br />4 - 10 <br />MEDIUM DENSE <br />10 - 30 <br />DENSE <br />30 - 50 <br />VERY DENSE <br />OVER 50 <br />RELATIVE DENSITY <br />SILTS AND CLAYS <br />BLOVS/FOOT <br />VERY SOFT <br />0 - 2 <br />SOFT <br />2 - 4 <br />MEDIUM STIFF <br />4 - 8 <br />STIFF <br />B - 16 <br />VERY STIFF <br />16 - 32 <br />HARD <br />OVER 32 <br />+ NUMBER OF BLOWS OF 140 POUND HAMMER FALLING 30 INCHES TO DRIVE A CONSISTENCY <br />2 INCH OD (1-3/8 INCH ID) SPLIT SPOON (ASTM D-1586) <br />PAGE pF <br />