Simple Shear for Soils
SSH-100 Simple Shear Testing System

Based on our external wall triaxial system, the GCTS SSH-100 Simple Shear Testing System is designed to yield accurate results in tests that cannot be done using other systems (e.g., consolidation can be done at K values other than K0).


  • Dynamic and static simple shear apparatus capable of applying cyclic loads up to 30 Hz
  • Digital servo control of shear and normal loads or displacements
  • Servo control of the confining pressure
  • Acrylic cell capable of 1,000 kPa (150 psi) lateral confining pressure (2,000 kPa option available)
  • 25 kN normal and shear load capacity
  • Includes platens for static and cyclic triaxial tests
  • Lateral support of top cap to minimize rotation compliance & sliding base mounted on preloaded linear bearings
  • Software for automatic performance of simple shear and triaxial tests (static and dynamic) with real-time graphical display of test progress
  • Automatic tilt mechanism for fast and easy specimen installation
  • Optional ultrasonic platens and unsaturated testing
  • Optional HAEV Platen for unsaturated soil testing


The design of the GCTS Simple Shear Testing System (SSH-100) is based on our external cell wall triaxial system. The apparatus has a fixed top and a sliding bottom base mounted on special linear bearings to help with specimen loading and unloading. The system also has a stiff internal support to minimize lateral compliance of the top cap.


One of the main advantages of the GCTS Simple Shear Testing System is that the apparatus does not require a reinforced membrane, as lateral support is provided via the confining pressure, which can be servo-controlled. This means that consolidation can be done at K values other than K0. However, this device also includes Teflon-coated thin rings to externally reinforce the standard latex membranes to ensure KO consolidation.


The SSH-100 is capable of testing 100 mm (4 in.) and 71 mm (2.8 in.) diameter specimens. Because the internal lateral support is provided by the confining pressure, specimen of different heights can be tested. This means that the system can be used to test either simple shear or triaxial test specimens with heights up to 2.5 times their diameter.


  • 25 kN axial load capacity
  • 25 kN shear load capacity
  • 1000 kPa confining pressure capacity
  • 100 mm maximum specimen diameter


Please contact GCTS for full specifications.