Monolithic Slab Foundation
MONOLITHIC CONCRETE SLAB COSTS. The cost of a monolithic concrete slab is 5 per square foot, resulting in an average total cost of 4,600 to 20,000. There are two beam types of monolithic slab foundations – oneway beam, and twoway beam. A oneway beam supports the foundation on two of its edges, whereas a twoway beam supports all four sides.
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