Problem No$.1$

A double angle shape, $2L64\frac{5}{16}$ is connected by a $\frac{3}{4}-$in gusset plate with LLBB as shown below. The total tensile service load $($unfactored load$)$ applied is it is $25\%$ dead load and $75\%$ live load. The bolts are $7/8-$in$-$diameter, A$325$ bearing$-$type. The angle material is A$572$ Grade $50$ steel, and the gusset is A$36$ steel. Hint: Check all possible failure possibilities, including block shear. Gage spacing $($bolt raw spacing$)$ see Manual p$1-52($Table $1-7$A$).$ Based on this answer the following question:

Question $1\mathrm{.}10$: In computing the efficiency factor $U$ you need the location of the angle centroid $x-$bar, what is the value to be used in this particular case? $[$Enter value in inches$]$