As per India standard code of practice for pre-stressed concrete (IS: 1343-1980) the minimum grades of concrete to be used for post-pensioned and pre-pensioned structural elements are respectively

As per India standard code of practice for pre-stressed concrete (IS:

1.	As per India standard code of practice for pre-stressed concrete (IS: 1343-1980) the minimum grades of concrete to be used for post-pensioned and pre-pensioned structural elements are respectively
A.	M20 for both
B.	M40 and M30
C.	M15 and M20
D.	M30 and M40
Answer» E.

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As per India standard code of practice for pre-stressed concrete (IS: 1343-1980) the minimum grades of concrete to be used for post-pensioned and pre-pensioned structural elements are respectively

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