▶The CBR-II load frame has been designed as a low-cost solution to doing CBR testing. It features one-speed operation with a preset speed specifically for CBR tests. The CBR speed is set at ASTM D1883 0.050 inches/minute (1.27 mm/minute) or BS 1377 PART 4 1 mm/minute. CBR-II is sold as a set with items in the chart below.