Correct answer is (c) 1′
The explanation: The plinth height is provided essentially to protect the superstructure from dampness which may seep in due to direct contact from the ground. The top of plinth level is provided with damp proof course which is an additional protection against dampness. Plinth height also prevents storm water/overflowing drainage from directly entering the building in case of heavy rainfall. Generally plinth level is provided at about 300–450 mm above finished ground level. It is suggested that plinth level should be decided by considering the top of the road level, the former should be kept atleast 150 mm higher.
