Home Test Methods Soil Testing Back Pressure Cyclic Direct Shear Tests Soil Test Equipment Back Pressure Cyclic Direct Shear Tests Soil Test Equipment Enables a direct shear test 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 Tests soil test:- Unsaturated Back Pressured Shear Box for back pressure cyclic direct shear tests soil test Dynamic Back Pressure Shearbox for back pressure cyclic direct shear tests soil test Back Pressure Shearbox - High Pressure for back pressure cyclic direct shear tests soil test GDS Back Pressured Shear Box for back pressure cyclic direct shear tests soil test