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Photos» Show All «Prev «1 ... 36 37 38 39 40 41 42 43 44 ... 1913» Next» » Slide Show Loading... Benkelman Beam in Use AASHO Test road, ca 1962 Invented by Alvin Carlton Benkelman, this was an economical portable device to measure deflections of pavement under heavy loads which to this day carries his name, the Benkelman Beam.
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