The decisive cost factor for transportation of building materials is usually their weight. The maximum dimensions are rarely a determining factor during loading. The low-density (from 4kN/m3) of CBS Building elements determines that more elements can be delivered per transport than would be possible with conventional building materials as the, systematically mounted, lightweight building elements, enable loading volumes between two to three times larger. Less vehicles means reduced loading times as well as less transportation costs which results in less CO2 emission.