The moment of inertia of the pair of vertical stiffeners about the center line of the web should not be less than__________________?

A. 1.5dV/C
B. 1.5d¥/C
C. 1.5d¥/C2
D. 1.5dY/C3
where, ‘t’ is the minimum required thick-ness of the web and ‘C is the maximum permitted clear distance between vertical stiffener for thickness ‘t’