$30-3$: A bolted single$-$shear lap joint is to be designed to connect $2$ plates, both with cross section dimension of $1^{\text{'}\text{'}}{6}^{\text{'}\text{'}}.$ Determine the number of bolts required based on either GSY or NSF using a double row of bolts. Assume Gr$.50$ steel and $3/4"$ A$490-$N diameter bolts $($Group $150).$ Also check bolt hole bearing assuming standard spacings of ${3\mathrm{.}0}^{\text{'}\text{'}}$ and ${1\mathrm{.}5}^{\text{'}\text{'}}.$

$30-4$: Redo Prob. $30-3$ assuming A$36$ steel and $7/8"$ diameter A$325-$SC $($Class A Faying Surface$)$ bolts $($Group $120).$Need $30-4$