![]() The ponding of concrete as well as how the slab is poured must be taken into account. It is advised that you choose a deck assuming a 2-span un-shored condition and avoid single-span situations as much as possible. In general, the economy of the steel floor system is improved by maximizing the span for a given deck size, for un-shored construction. For un-shored construction, the Steel Deck Institute (SDI) offers tables that show the maximum span permitted for a specific deck and slab arrangement. The deck size should, within reason, be chosen to allow for the beam spacing. The design of composite beams is almost always carried out using computer software or design tools like those found in the AISC Manual. ![]() In many design situations, increasing the beam size can satisfy the design moment while significantly reducing the number of studs needed. It is usually possible to produce an economical design with partial composite action in the beam.
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