Test of bearing ability of a soils by the Californian method


The LoadTrac II load frame provides compression/extension testing for a number of geotechnical tests that must have accurate control of the rate of displacement during loading. With accessories, the unit can perform CBR, unconfined compression and triaxial shear phase testing.
The base unit includes a stepper motor, lead screw, vertical tension rods and crosshead, displacement transducer, electronic controls and network communications. Versions of the unit are available to test loads up to 90 kN (20,000 lbs.). Displacement rates can be set to any value between 0.00003 and 15 mm per minutes (0.000001 to 0.6 inches per minute). CBR displacement rate is set through software at 1.27 mm/min. (0.05 in./min.) in accordance with ASTM D 1883.
The base unit can run in stand-alone mode without a computer. It includes built-in data acquisition and display capability. Sensor readings are displayed in Sl or English units and stored in memory.
Optional software running in Windows® 2000, XP, or Vista completely automates the test, reducing the data and preparing test results.


  • Choose capacity to fit user needs from 22, 45 and 90 kN (5,000, 10,000 and 20,000 lbs.) models
  • Total automation of data collection and reporting of test results
  • Prepare tables and plots of report quality within minutes of completing a test
  • Generate columns of data for easy reduction using your own spreadsheet software
  • Ability to access and control the unit over a computer network using Geo-Net option


  • ASTM D-1883
  • AASHTO T-193 "Standard Method for CBR (California Bearing Ratio) of Laboratory-Compacted Soils"


MOTORStepper motor with built-in controls
TRAVELBuilt-in displacement transducer with 76 mm (3 in.) range and 0.0013 mm (0.00005 in.) resolution
DISPLACEMENTControl from 0.00003 to 15 nun per minute (0.000001 to 0.6 in. per minute)
POWER110/220 V, 50/60 Hz, l phase
LoadTrac II464 mm x 546 mm X1206 mm (18 in. x 21.5 in. x 47.5 in.)
LoadTrac II       55 kg (120 lbs.)
LoadTrac II ModelsFrame capacity
LTTI-10,00045 kN (10,000 lbs.)
LTTI-20,00090 kN (20,000 lbs.)
LTTI-50,000222 kN (50,000 lbs.)
7010CBR plunger with load cell adapter.
Geo-NET™Network/Communication card and cable to link load frame to PC.
CBRSoftware package to automatically run and report CBR tests
OPTIONSUC, consolidation, and triaxial testing modules

For viewing forms of the report and the interface of the operating program click the mouse on a corresponding miniature.