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Composite floor slabs or decks consist of profiled steel decking with an in-situ reinforced concrete topping. The steel decking acts as a permanent formwork for the concrete and provides tensile resistance as a result of the shear bond between the deck and concrete. Once the concrete has gained strength, the two materials act together compositely. The composite slab is connected to the steel beams, with the composite interaction being achieved by the attachment of shear connectors to the top flange of the beam. These connectors generally take the form of headed studs and are welded to the beam, and provide sufficient longitudinal shear connection between the beam and the concrete so that they act together structurally. The ComFlor® family of products comprises seven steel floor profiles, each designed specifically for a particular application area. ComFlor 80 is an 80mm deep, round shouldered trapezoidal profile, designed to allow for greater spans.