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Direct Simple Shear Test System

What is the Direct Simple Shear test?

Direct Simple Shear Data Sheet
Sample Geotechnical Report

ShearTrac II DSS

The ShearTrac II direct simple shear (DSS) system is used to measure undrained shear strength of soils to reflect the average shear strength mobilized in the field during failure of embankments on soft soil foundations and deep excavations in clay. The DSS test generates a fairly homogeneous state of shear stress throughout the specimen, which provides initial stress condition, stress path, and deformation configuration that models numerous field loading conditions more closely than any other test system.

Applicable Test Standards

  • ASTM D2435, D6528
  • AASHTO T 216


  • Stress (load) or strain (displacement) control
  • Tabletop design saves space
  • Fully automated via computer or standalone capability for control and data collection
  • Micro-stepper, electronic motor systems offer precise loading and shearing
  • More accurate, reliable, and easier to maintain than units requiring hydraulics or air pressure
  • Immediately produce reports according to test standards
  • Front panel display and keypad for observation and control of the test
  • Geo-Net compatibility allows access and control over a computer network
  • System flexibility to optionally perform Direct/Residual Shear, 1-D Incremental Consolidation, Constant Rate-of-Strain (CRS) Consolidation, and Unconfined Compression testing


  • Choose load capacity up to 11 kN (2,500 lbs) horizontal & vertical
  • Accurate displacement rate control from 0.000006 to 21 mm/min (0.0000003 to 0.8 in/min)
  • Vertical travel: 25.4 mm (1.00 in)
  • Horizontal travel: +/- 25.4 mm (1.00 in)
  • Dimensions: 228 x 560 x 762 mm (9 x 22 x 30 in)
  • Weight: 63 kg (140 lbs)
  • Teflon® coated shear rings: 63.5 mm (2.5 in) standard; 50 mm (2.0 in) available
Request More Information Direct Shear Apparatus

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