You are designing a method to mount a $1,995$ lbf battery pack to the chassis. You are trying to decide on the best way to use $\frac{1}{4}"-20$ steel bolts with a yield strength of $50$ksi to hold the battery pack. In each case you are designing to have a factor of safety of $2.$

How many bolts are needed if the bolts are put in double shear directly on the shank of the bolt? Use the shank diameter $(1/4$ inch$)$ for calculating the area. Provide your answer with partial bolts. For example if you need $2\mathrm{.}5$ bolts to get exactly a factor of safety of $2,$ give $2\mathrm{.}5$ even though in practice you would need to use $3$ bolts in your design. Do this for all problems.

Shank Thread