Design the welds, so the angular develop its maximum strength. The gusset plate is $\frac{5}{8^{\text{'}\text{'}}}$ thickness. $($Steel A$-36).$

Select a pair of channels and design the fillet welds. The loading is $75\%$ dead load and $25\%$ live load. Compare for a$)$ A$36$ and b$)$ A$572$ Gr $60.$ Gusset plate is $\frac{5}{8}"$ thickness.