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Required information

Problem $08\mathrm{.}029-$ Static bolt factor of safety

For a bolted assembly with six bolts, the stiffness of each bolt is $k_b=2\mathrm{.}200Mlb\frac{f}{?}$ in and the stiffness of the members is $k_m=13Mlb\frac{f}{i}n$ per bolt. An external load of $80$ kips is applied to the entire joint. Assume the load is equally distributed to all the bolts. It has been determined to use $\frac{1}{2}$ in$-13$ UNC grade $8$ bolts with rolled threads. Assume the bolts are preloaded to $75$ percent of the proof load.

Problem $08\mathrm{.}029.$b $-$ Static bolt factor of safety

Determine the load factor of safety. $($Round the final answer to three decimal places.$)$

The load factor of safety is $$