The cross section of a rectangular beam having width b and height h is shown in part
(a) of the figure. For reasons unknown to the beam designer, it is planned to add structural projections of width b/9 and height d to the top and bottom of the beam [see part (b) of the figure].
For what values of d is the bending-moment capacity of the beam increased? For what values is it decreased?
![2245_29382c50-f1e2-401e-8370-73db621a71f0.png](https://secure.tutorsglobe.com/CMSImages/2245_29382c50-f1e2-401e-8370-73db621a71f0.png)