Deck After installation and adequate fastening, floor deck serves several purposes. It (a) acts as a working platform (b) stabilizes outdoor product that looks like woodthe frame (c) serves as concrete form for the slab and (d) reinforces the slab to carry the design loads applied during the life of the building.Composite decks are distinguished by the presence of shear connector devices as part of the deck.These devices interlocking composite timbers for garden bordersare designed to mechanically lock the concrete and deck together so that the concrete and the deck work together to carry subsequent floor loads.The shear connector devices can be rolled Outdoor floor costin embossments, lugs, holes or wires welded to the panels.The deck profile configuration can also be used to interlock concrete and steel.