Example #$2-$ Shear Stress $($Ex$.14\mathrm{.}8$ on page $311)$

An $8-$in x $12-$in timber member is subjected to a vertical load inducing a maximum shear$-$force of $7,000lb.$ Calculate the maximum shear stress at the neutral axis.

Step $1$: Calculate the shear force V

Step $2$: Calculate the statical moment of area $Q$

Step $3$: Calculate the moment of inertia I about the neutral axis

Step $4$: Find the width b

Step $5$: Apply the general shear formula