Concrete floors, whether used in a residential basement, a big-box store or a manufacturing plant, are basically the same (learn about these popular applications: polished concrete,stained concrete and epoxy coatings). In commercial or industrial settings, though, the slabs usually have special requirements based on the loads or flatness or levelness required. To get a slab that meets these requirements, the contractor will use special techniques in placing and finishing the concrete. Commercial or industrial floors can also have special requirements for surface hardness, finish, and even color. Wal-Mart, for example, has a specification for their exposed concrete floors that incorporates color, surface densifiers, and a hard troweled finish. That company has high expectations for everything and their concrete floors are no exception.
Commercial / Industrial (C/I) floors can be built on grade or can be suspended. Suspended floors are often built on metal decking, which is corrugated sheet metal supported by structural steel. Achieving high flatness and levelness values on these floors can be difficult since the decks and frames deflect under the weight of the concrete.