When an elevated concrete slab is to be cast on a steel deck, what are the most effective measures architects, engineers, and contractors can take to control cracking?
This is an unresolved issue for many builders. Composite-deck slabs usually contain very little reinforcement because concrete bonds to the steel deck, which provides tensile capacity for positive-moment areas. But what about steel requirements in negative-moment regions and for temperature and shrinkage reinforcement?
Questions about jointing requirements also arise. Because the concrete deck is restrained by the metal decking, can contraction joints effectively control cracking, and what are the joint spacing requirements? There are no published guidelines to provide answers to these questions, but this article offers some possible solutions.