SSC JE Civil Engineering 30-Oct-2020 Shift 2 Paper

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Question : 105 of 200

Marks: +1, -0

According to IS 456-2000, nominal cover for reinforcements in case of footings, under 'very severe' exposure:

shall not be less than 30 mm
shall not be less than 25 mm
shall not be less than 50 mm
shall not be less than 40 mm

Solution:

Concept:
As per IS 456 : 2000, Table 5;

Environment	Maximum grade of RCC	Minimum grade of PCC	Nominal Cover
1. Mid	M – 20	_	20 mm
2. Moderate	M – 25	M 15	30 mm
3. Severe	M – 30	M 20	45 mm
4. Very severe	M – 35	M 20	50 mm
5. Extreme	M - 40	M 25	75 mm

Cement content should not exceed 450 kg/

\m^3

.

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