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A steel disc cast into the concrete is pulled against a counterpressure on the surface with a calibrated, hydraulic pullmachine.

The LOK-TEST Pullout System

1.

A 25 mm disc (a) is cast into fresh concrete at a depth of 25 mm.

2.

After the form is removed, the stem is taken out (b), and a pullbolt threaded into the disc. The pullmachine is coupled to the pullbolt.

3.

The end of the pullmachine is a 55 mm diameter ring acting as the counterpressure (c)

A simplified illustration is shown below:

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