What is foundation or Sub-Structure? In any structure the lowest part is called foundation or sub-structure. In general cases, structures comprise two parts: upper part and lower part. The part lying above the ground surface is upper part where as the part buried below the ground surface is lower part. Being the portion above the ground surface, the upper part is called super-structure while the lower part, the sub structure or foundation. The foundation acts as an interface between the super-structure and that part lying under the soil. Therefore the…
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