The UNIDOME XS-D product line is suitable for use in exceptional concrete components between 50 cm and 100 cm component thickness. Extremely large spans, raft foundations or simply to create a height levelling can be the reason for the material-saving application. The XS-D leads to double or triple load reduction, concrete savings and CO2 savings. The design in this case is carried out using the known regulations for ribbed or waffle slabs of the applicable local reinforced concrete construction standard.