Benkelman beam apparatus

Standartd : AASHTO T256

The Benkelman beam is used to measure the deflection of flexible pavements under the action of standard wheelload.

The appliance comprises a frame on adjustable supports and bearing the fulcrum of a moveable arm; the outer extremity of this arm rests on the ground whilst the inner extremity touches a dial gauge.

Road defl ection readings are given on the dial gauge.

Testform has designed and manufactured the instrument with great care to guarantee the required accuracy for measuring infinitesimal arm rotations according to lever ratio (1:2).

In order to meet such specifi cations, light alloys have been used for structural components, accurate machine-tooling for the assemblies and low-friction bearings for the moving components.

It is equipped with a special electric vibrator actuated by a rechargeable battery in order to eliminate breakaway resistance.

Those models that are not equipped with this vibrator give defl ection measurements which are systematically lower than real values, thereby rendering the test untrustworthy.

An arm guard has been specially designed so as to reduce irregularities occurring through insolation.

The instrument is easily dismantled for transport and is housed in a storage box.

Supplied complete with centesimal dial gauge (80 mm diameter, 0.01 divisions, 30 mm travel), periscope for easy dial gauge reading .

Weight: 66 kg (gross), kg 10 (net).

Dimensions:

- assembled: 366 x 50 x 50 (h) cm.

- packed: 200 x 30 x 30 (h) cm.