QUESTION $3(25$ Marks$)$

Figure $3$ shows the support structure for a suspended apparatus in a laboratory. The apparatus is hung from the $\frac{1}{4^{\text{'}\text{'}}}$ A$36$ plate that is welded to the $\frac{3}{8}"$ plate using E$70$XX electrodes. Assuming that the $\frac{3}{8}"$ plate has already been adequately designed, determine the maximum weight that the apparatus can be$.$