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Steel Roof Deck and Floor Deck Solutions
Composite floor deck is commonly used in multi-story building construction. While steel roof deck is designed to support roofing systems, composite floor deck serves a different purpose—it acts as a durable work platform during construction and a permanent form for poured concrete. The deck’s vertical flange embossments create a mechanical bond with the concrete, producing strong composite action. For projects requiring sound-dampening properties, an acoustic deck may also be specified as part of the flooring system. Composite floor deck is available in 1.5”, 2”, and 3” depths and can be ordered in 16, 18, 20, and 22 gauge.
Form deck, also known as non-composite deck, is used in floor applications where a bond between steel and concrete is not necessary. Without embossments, it does not create composite action like composite floor deck. Form deck is often used in multi-story buildings, stair landings, and similar structures. In some designs, it can also function as a steel roof deck, offering support for roofing systems without the need for composite performance. Available in 9/16”, 15/16”, 1.5”, 2”, and 3” profiles, form deck comes in gauges ranging from 16 to 28.
The steel roof deck is a corrugated metal panel specifically designed and engineered for use as a structural roof element in residential, commercial, and multi-story buildings. They are typically supported in applications by steel joists or beams. Marlyn Steel Decks manufactures four primary types of steel roof deck profiles to meet varying span and load requirements. The most common is the wide rib profile, known as B deck. For mid-range applications, the intermediate rib (F deck) and narrow rib (A deck) profiles are frequently used. For extended spans, the deep rib profile, referred to as N deck, offers added structural capacity. All roof deck types are available custom-cut to length, with standard lengths ranging from 6’ to 42’, ensuring a precise fit for each project’s needs.
Marcore is a 2” deep dovetail-shaped deck designed as a versatile solution for both floor and roof applications. Engineered for use as a composite steel floor deck, steel roof deck, or acoustic deck, its unique dovetail rib profile provides excellent structural performance along with architectural appeal. Marcore supports floors and roofs while offering a clean, linear-plank ceiling finish that’s ideal for exposed installations.
Known for its superior acoustical and structural capabilities, Marcore is often the architectural choice for integrated roof and floor systems. In steel roof deck applications, Marcore can span longer distances and support heavier loads than standard profiles. For floor systems, its dovetail design enables thinner slabs while maintaining the long spans necessary for efficient multi-story construction. Marcore also forms a strong bond with concrete, similar to traditional composite decks, ensuring durability and structural integrity.
Available in 18, 20, and 22 gauge, Marcore can be specified with or without a stiffener rib to suit various engineering needs and project requirements.
