Home Test Methods Soil Testing Back Pressure Cyclic Direct Shear Load Tests Soil Test Equipment Back Pressure Cyclic Direct Shear Load Tests Soil Test Equipment Enables a direct shear test in which the load is cycled back and forth to be performed on a specimen at static rates with back pressure applied. The following soil test equipment can perform the Back Pressure Cyclic Direct Shear Load Tests soil test:- Unsaturated Back Pressured Shear Box for back pressure cyclic direct shear load tests soil test Dynamic Back Pressure Shearbox for back pressure cyclic direct shear load tests soil test Back Pressure Shearbox - High Pressure for back pressure cyclic direct shear load tests soil test GDS Back Pressured Shear Box for back pressure cyclic direct shear load tests soil test