CBR Load Frames

Gilson Load Frames are manufactured in cooperation with Karol-Warner and models listed here are ideal for laboratory California Bearing Ratio (CBR) Testing when outfitted with suitable components. A quick change of components easily converts Load Frames for use with other soil testing applications, such as Unconfined Compressive Strength or Triaxial loading. The chart below indicates their individual capabilities and capacities.

The Gilson Manual CBR Load Frame is designed with separate hand-operated cranks for loading, and doesn’t require an additional component set.

Models: HM-396, HM-396F
Models: HM-397, HM-397F
Models: HM-399, HM-399F
Models: HM-398, HM-398F
Model: BR-10
ModelStrain Rate,
Capacity, lbfTriaxialUnconfined
Ratio (CBR)
Soil CementMarshall
Semi-Circular Bend (SCB)
Tack Shear
HM-396 0.001 - 0.1 10,000  
HM-397 0.0001 - 0.3 10,000  
HM-397B 0.00001 - 0.29999 10,000  
HM-399 0.00001 - 0.29999 20,000  
HM-398 0.02 - 2.0 10,000

Models have a capacity of 10,000 or 20,000lbf (44.5 and 89kN) with 11.9x37.3in (302x947mm) WxH frame openings. Platen diameter is 8in (203mm). Units run on 3/4hp DC motors and controllers regulate strain rates to ±1% of set point. Sturdy, 14-gauge painted steel enclosures have adjusting nuts on the 1.25in (32mm) coarse-threaded rods to quickly adjust the horizontal cross-head height.

  • Load Frame, 0.001—0.1in/min, 10,000lbf a high-speed platen advance rapidly positions the platen for faster set-up.
  • Load Frame, 0.0001—0.3in/min, 10,000lbf with a micro-stepping drive controller that allows more precise control of loading rates.
  • Load Frame, 0.00001—0.29999in/min, 10,000lbf features a precision strain rate allowing for testing of sensitive soils. The micro-stepping motor and drive controller precisely control load rates.
  • Load Frame, 0.00001—0.29999in/min, 20,000lbf features an enhanced strain rate for sensitivity. The best choice when testing ASTM D4767 consolidated/undrained triaxial tests.
  • Load Frame, 0.02-2.0in/min, 10,000lbf can be used for a wider range of test methods. Digital and analog components and sets that attach to the Load Frame are available for Unconfined Compression, CBR, Soil Cement and Triaxial testing.
  • Manual CBR Load Frame is an effective manually-operated Load Frame for CBR testing and meets ASTM D1883 and AASHTO T 193 standards.