Sandwich construction element has rigid expanded plastic core and planks on both sides, and core on its oppositely lying sides has groove or tongue corresponding to it, with planks fitted on core with offset in relation to it

摘要

The sandwich construction element has a rigid expanded plastic core (4) and planks (3) on both sides. The core on its oppositely lying sides has a groove or tongue corresponding to it. The surface areas of the planks and the core are of the same size, and the planks are fitted on the core with an offset in relation to it. Each of the planks consists of two layers with the inner lying layer offset in relation to the core by a first measurement and the outer lying layer offset by a second measurement.