AS PER AASHTO T 256
It is used to determine of the rebound deflection of flexible pavement under static load.
General Description and Specifications:
Lightweight Aluminium construction, Ease of Transportation, Unique Telescopic Design Simplifying Field set up, Compact, Thereby reducing the amount of storage space needed
Benkelman Beam utilizes the technique of using balanced beam in conjunction with a suitable vehicle to measure road flexure The improved Benkelman Beam is a convenient, accurate device for measuring the deflection of flexible pavements under moving wheel loads. Operating on a simple lever arm principle, the unit consists. Supplied with carrying case.
The instrument is supplied in two parts for assembling on site with easy hand tools. In use one end of the beam rests at a point under investigation while the beam is pivoted at the centre. The free and carries a dial gauge to record the deflections. The other end is kept on a stable platform. The beam ratio is 2:1 which magnifies even small deflections. Supplied with a dial gauge 0.01 x 25mm..
NOTE : Benkelman Beam with Digital Dial Gauge also available at an extra cost .