Abstract
Experience has shown that the relative variation in the unit rates of constituents of construction with change in time is never uniform. Because of this, a structural system or scheme which is economical at any given time may not always remain so. For accuracy, it is therefore essential to consider the prevailing unit rates of constituents for cost estimation. With this aim in mind, quantities of constituents in an interior grid of an overall structure using the reinforced concrete beam and slab system are shown in Table 10.1 for different design parameters. The same information, for the reinforced concrete flat slab and waffle slab systems, is shown in Tables 10.2 and 10.3 respectively, while for the prestressed concrete beam and reinforced concrete slab system it is exhibited in Table 10.4.
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