Determine the column loads assuming:

$DL(decking,$ flooring, etc.$)=10psf$

$LL(occupancy)=\frac{40psf}{50psf}$

Total

Beam $B-2$ spans between girder $G-3$ and column $B-2$ and

beam $B-3$ spans between girder $G-3$ and column $C-2$

The answer is:

Load on columns A$-1$ & D$-1$ is $3750$ lb$.$

Load on columns B$-2$ & C$-2$ is $3750$ lb$.$

Load on columns A$-3$ & D$-3$ is $5000$ lb$.$

$*$Please show how to solve.