A tensile load will be carried by double angle section as shown below. The $M20$ bolts have $8\mathrm{.}8$ class. The threads are outside the shear plane. Assume gusset$-$wall connection is safe.

a$)$ Determine the capacity of the system according to LRFD$.($Check the rupture, yielding, block shear and bearing in the L members and the gusset. Check the shear in the bolts.$)$

b$)$ How much tensile dead load can be carried by the system if live load is two times the dead load?

$151019018$L$100$x$100$x$6$

$16$ mm

S$275$

S$235$

School number

Hint: Whitmore section for the gusset is shown below.