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Unconfined Compressive Strength Load Frames

Load Frames for testing unconfined compressive strength are available in 10,000 or 20,000lbf (44.5 or 89kN) capacity and varying strain rates for a range of other soil testing applications. The chart below indicates each model’s strain rate and capacity, as well as the specific tests for which it is designed. Load Frames easily adapt to perform other loading applications with various digital and analog components.

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Load Frame, 0.001—0.1in/min, 10,000lbf
Models: HM-396, HM-396F
Load Frame, 0.0001—0.3in/min, 10,000lbf
Models: HM-397, HM-397F
Load Frame, 0.00001—0.29999in/min, 20,000lbf
Models: HM-399, HM-399F
Load Frame, 0.02—2.0in/min, 10,000lbf
Models: HM-398, HM-398F
ModelStrain Rate,
in/min
Capacity, lbfTriaxialUnconfined
Compressive
Strength
California
Bearing
Ratio (CBR)
Soil CementMarshall
Lottman
Semi-Circular Bend (SCB)
Tack Shear
HM-3960.001 - 0.110,000 
HM-3970.0001 - 0.310,000 
HM-397B0.00001 - 0.2999910,000 
HM-3990.00001 - 0.2999920,000 
HM-3980.02 - 2.010,000

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  the micro-stepping drive controller 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 consolidatied/undrained triaxial tests.
  • Load Frame, 0.02-2.0in/min, 10,000lbf allows use 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.