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Penetration Pistons are an integral piece of field equipment used in California Bearing Ratio (CBR) testing. They conform specifically to CBR tests and meet requirements for ASTM, AASHTO, and Army Corps of Engineers (COE) methods. In testing, the piston penetrates the soil, and load on the piston is compared to penetration depth to determine CBR values.
BRA-30 is equipped with a 3/4in threaded male connector and 16tpi.
BRA-31 is equipped with a 1/2in threaded male connector and 10tpi.
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