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Determine a Detailed cost of a residential building (R.C.C framed structure) located in Vashi, Navi Mumbai.

1) Earthwork excavation in foundation

2) Plain cement concrete (1:4:8) in foundation

3) Brick masonry in CM 1:6 for super structure

4) R.C.C work in footings, columns, Plinth beams, Chajja, Roof beams and roof slab.

1 Answer
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(*No need of using center line or long wall short wall method for framed structure)

Trapezoidal part of footing

$A1=0.7×0.7=0.49m² \\ A2=0.33*0.33=0.1089m² \\ Am=\frac{A1+A2 }{2}=0.2995 \\ V=\frac{D}{6}[A1+A2+4Am] \ =\frac{0.30}{6}[0.49+0.1089+(4*0.2995)] =0.089m³$

Rectangular Portion =$0.7×0.7×0.15 =0.0735m³$

Total volume of Foundation

$= 0.089+0.0735=0.1625m³$

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f) For roof slab & roof beam

Total area of slab $= (9.49×6.39) + (5.26×(8.46-6.39)) \\ =60.64+10.89=71.53m²$

Depth of Beam for given diagram

=3.0-2.1=0.9m

Total Length of beam =42.6m

Total R.C.C quantity in beam=0.23×0.9×42.61=8.82m³

R.C.C quantity in slab= (Total area of slab–columns–beams)

$=\bigg\{71.52-(0.23*0.23*10) \frac{8.82}{0.9}\bigg\}×0.1 \\ =(71.53-0.529-9.8)×0.1 \\ =6.1m³$

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