A Proper Overview of Top down Construction, including Advantages and Disadvantages

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Substructures and superstructures are typically built in layers, starting with the foundation and proceeding to the top, in most buildings with underground structures. This bottom up approach is a straightforward design and execution approach. However, it is unsuitable for projects with limited time and site conditions. The top down construction method is the opposite of bottom up construction, which involves digging deep excavations to construct permanent structures from the top down.