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tDensity- Blow count <br /> Clay&Silts Sands <br />' V Soft 0-2 V Loose 0 -4 <br /> Soft 2 -4 Loose 4 - 10 <br /> Firm 4 -8 M Dense 10-30 <br /> Stiff 8 - 16 Dense 30- 50 <br /> V Stiff 16-32 V Dense > 50 <br /> Hard > 32 <br />' Size <br /> Gravel <br /> Coarse 314" <br />' Fine 2 - 5mm <br /> Sand <br /> Coarse 5- 2mm <br />' Medium 25 - 5mm <br /> Fine 118- 25mm <br /> V Fine 1/16 -1/8mm <br /> Silt < 1116mm <br /> 1 <br />