A concrete slab bears directly on a four-inch layer of granular fill over existing undisturbed grade or compacted structural fill. A vapor barrier is installed directly beneath the concrete slab where applicable. Thickness and reinforcing of the concrete slab are sized per structural plans.
CONCRETE SLAB SEE PLANS FOR THICKNESS & REINFORCING 4" GRANULAR FILL VAPOR BARRIER (WHERE APPLIES) EXISTING UNDISTURBED GRADE OR COMPACTED STRUCTURAL FILL
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