During the placement of concrete, steel deck resists the vertical loads associated with the weight of the concrete and the construction loads. As the concrete cures a chemical and mechanical, shear bond forms collectively between the surface of the steel deck and the concrete. The mechanical bond is achieved via embossed features on the surface of the steel deck. The strength of a composite diaphragm (deck + concrete) depends on the shear bond and the complimentary behavior of steel and concrete in such an assembly. The steel functions as the tension element at the bottom of the beam while the concrete functions as the compression element at the top of the beam. We call this FORMLOK deck.