Lecture 7 - Page 1 of 10 Lecture 7 – Composite Steel Beams Steel beams are usually used to carry a metal deck-supported concrete slab. In non-composite construction, the beam does NOTinteract structurally with the slab – the slab is simply dead weight. This is because the slab is not adequately bonded to the beam. Non-Composite ConstructionThe word “composite” means 2 or more different materials. In composite construction, the slab is adequately bonded to the steel beam by means of headed “shear studs” resulting in a composite beam. The concrete acts like a large “flange” in compression, while a much greater portion of the steel beam acts in tension. The result is a VERY efficient beam– as much as 40% to 60% lighter weight steel than non-composite. Composite ConstructionHeaded shear studs welded thru metal deck to beam flange
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