Our wooden Deltaracks are as strong as iron. This is necessary because the materials in the natural stone sector (and in the glass industry) generally have a high weight density. As the base material we chose birch plywood, made from thin glue-bonded veneers 1.4 mm thick. In cooperation with the Belgian Packaging Institute (IBE/BVI), we developed a tailored test programme for carrying out various static and dynamic tests on all our products. The test results were pleasantly surprising.