Chapter 9, Problem 20P

9–17 to 9–20 A steel bar of thickness h, to be used as a beam, is welded to a vertical support by two fillet welds as shown in the figure.

1. (a)   Find the safe bending force F if the allowable shear stress in the welds is τ_allow.
2. (b)   In part a, you found a simple expression for F in terms of the allowable shear stress. Find the allowable load if the electrode is E7010, the bar is hot-rolled 1020, and the support is hot-rolled 1015.

Problem Number	b	c	d	h	τallow
9–17	50 mm	150 mm	50 mm	5 mm	140 MPa
9–18	2 in	6 in	2 in	$\frac{5}{16}$ in	25 kpsi
9–19	50 mm	150 mm	30 mm	5 mm	140 MPa
9–20	4 in	6 in	2 in	$\frac{5}{16}$ in	25 kpsi