Steel deck is 38 mm or 76 mm deep, 750 to 900 mm wide, fluted steel sheets used in the construction of a roof as the supporting structural member on which the built-up roofing system is placed. Roof deck is most commonly used in a flat (horizontal) roofing configuration, but can also be used for sloping roofs. The in-plane strength of the deck can also be utilized as a steel deck diaphragm to act as the horizontal bracing for the structure, often eliminating the need for discrete bracing.
Composite deck is a similar product to roof deck and is a fluted steel sheet, 38 mm or 76 mm deep. What distinguishes composite deck from plain deck (floor or roof) is the composite structural action developed between the steel deck and a concrete slab. The composite deck initially acts as a stay-in-place form for the concrete floor slab. After the concrete cures the composite steel deck and the concrete interlock creating a composite slab. This interlocking is achieved through a system of embossments rolled into the webs and flutes of the deck.
Deep Composite Deck
A deep composite deck is a similar product to the regular composite deck but is up to 203 mm deep. This deeper section, combined with additional reinforcing steel and concrete, creates a floor system that can achieve spans over 9 m. The long spans provide additional flexibility and efficiencies in the structural framing system.