An arm ABC lying in a horizontal plane and supported at A (see figure) is made of two identical solid steel bars AB and BC welded together at a right angle. Each bar is 20 in. long.
Knowing that the maximum tensile stress (principal stress) at the top of the bar at support A due solely to the weights of the bars is 932 psi, determine the diameter d of the bars.
![1290_83bf4c58-21e9-4664-982e-db8f4a662a33.png](https://secure.tutorsglobe.com/CMSImages/1290_83bf4c58-21e9-4664-982e-db8f4a662a33.png)