Estimating and Costing
The plinth area of a building not includes

Lift and wall including landing
Area of cantilevered porch
Internal shaft for sanitary installations up to 2 sq m. in area
Area of the walls at the floor level

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Estimating and Costing
Pick up the incorrect statement regarding a master trap from the following:

The water seal is less than that of ordinary traps
The mica flap valve which opens inwards only, is fitted at the top of the inlet pipe
It is provided in between the lower end of the house drain and the street sewer
It is provided a cleaning eye at the top of the trap

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