As per Indian Standard 456, all columns designed for minimum eccentricity must be equal to, the sum of the unsupported length/500 and lateral dimension/30, subjected to a minimum of X millimeters, where X is ______.
1
20
2
25
3
15
4
10
As per Indian Standard 456, all columns designed for minimum eccentricity must be equal to, the sum of the unsupported length/500 and lateral dimension/30, subjected to a minimum of X millimeters, where X is ______.