How to solve

Please complete the following problems

$1.$Determine the maximum combined loads using the recommended AISC expressions for LRFD: D $=100$ psf$,$ L $=70$ psf$,$ R $=12$ psf$,$ Lr $=20$ psf and $S=30psf$

$2.$Structural steel beams are to be placed at $7$ ft $6$ in ion center under a reinforced concrete floor slab. If they are to support a service dead load of $D=64$ psf of floor area and a service live load L $=100$ psf of floor area, determine the factored uniform load per foot which each beam must

support using the LRFD expressions.

$3.$Determine the maximum combined loads using the recommended AISC expressions for ASD: D $=100$ psf$,$ L $=70$ psf$,$ R $=12$ psf$,$ Lr $=20$ psf and $S=30psf$

$4.$Structural steel beams are to be placed at $7$ ft $6$ in ion center under a reinforced concrete floor slab. If they are to support a service dead load of D $=64$ psf of floor area and a service live load $L=100$ psf of floor area, determine the factored uniform load per foot which each beam must support using the ASD expressions.