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SPECIFICATIONS <br /> 1. All concrete to be 3000 PSI Minimum <br /> 2. All rebar to be Grade 60 <br /> 3. Concrete slab to have construction joints located at half distance of width ani <br /> length dimensions. <br /> 4. 6" Polyvinyl (PVC) water stop joints with 1" diameter center bulb to be used :n <br /> construction joints and junction of concrete slab and retaining walls. <br /> N <br />