Comparison of simple and sinus expansion joints - steel roller test

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Steel roll imitating a forklift wheel reveals the difference between passing through an open straight joint gap and an open sinusoidal joint gap.

An impact to the edge of an open straight expansion joint generates vibrations and shocks - which eventually damage the expansion joint itself, concrete just behind the expansion joint, forklift wheels and transported goods.

The sinusoidal form of the joint gap eliminates the occurrence of wheel hits in open edge of expansion joints, i.e. eliminates the cause of all damage and problems.