California Bearing Ratio (CBR) was developed by the California state highway department and is widely used to determine the resistance strength of sub-grade and sub-base materials. CBR values can be determined under laboratory as well as under field conditions. CBR equipment includes customizable Multispeed load frames fitted with components to perform CBR. Frames can also be outfitted with a variety of components for other soil testing applications. In addition, you can find Molds, Spacer Discs, Swell Plates, Surcharge Weights, and other accessories for CBR tests.