Reinforced concrete cast onto steel decking, supported by beams or load bearing walls. They are sometimes overlaid with light-weight roofing. This system is similar to the floor system called Composite Steel Floor Deck and Concrete Slab.

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Composite steel deck and concrete slab supported by steel trusses, Canada (S. Brzev)

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Steel trusses (Open Web Steel Joists) supported by precast concrete tilt-up walls, Canada (S. Brzev)