$1\mathrm{.}26$ We are tasked with finding the idealized live load. For$$preliminary design of the members, we can ignore the corridors and consider the entire floor to be offices. Let$$s start with the idealized live load on girder B$3-$B$4$ for level $1($first floor$).$

$1\mathrm{.}27$ The maximum likely snow load on the roof is $20$ psf$.$ Our task is to find the idealized snow load on beam A$2-$B$2$ for level $2($the roof$).$