Steel in concrete slabs on ground is not intended to be structural, only to hold cracks closed tightly. For that reason, slabs are considered unreinforced, even though most will have some “temperature” reinforcement.
resource : http://www.concreteconstruction.net/concrete-flatwork/slab-reinforcement.aspx
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[…] the rebar. For simple projects like typical building foundations and slab reinforcement, you can most likely buy the necessary rebar from a building supply center or home improvement […]