HW $9\mathrm{.}3$

Multiple possible service loads on a structure $($e$.$g$.,$ wind, snow, live, dead, etc.$)$ are shown and listed in the table $-$ List all applicable load combinations

Determine the required axial strength $($Pu$)$ in Column $AB$ and Column CD

$\backslash$table$[[,$V$1,$V$2,$H$],[$Dead$,$ D$,100$ k$,100$ k$,-],[$Live$,$ L$,80$ k$,80$ k$,-],[$Snow$,$ S$,70$ k$,90$ k$,-],[$Wind$,$ W$,-,-,120$ k$]]$

$V2+\frac{H}{2}$

$2.$ If the safety index, $,$ for load combination $5\mathrm{.}3\mathrm{.}1$ b is $$~~$3\mathrm{.}5...$

$...$ what is the probability of failure, pf$?$

$...$ what is the approximate safety index and probability of failure for load combination $5\mathrm{.}3\mathrm{.}1$d$?$

$3.$ The probability of failure, pf$,$ is for a $75-$year lifetime of the structure...

$...$ what is the daily probability of failure?