Flooring blocks, jack arches, and tray blocks are concrete flooring support elements that are suspended between two joists. They are manufactured at CTC widths of 60 and 70 cm, in depths up to 30 cm. A variety of materials can be used, depending on the technical characteristics of each floor.
Expanded polystyrene (Porexpan): This enables a considerable reduction in the weight of the floor itself, thanks to the lightness that this material adds; it improves insulating properties at the same time.