Section design with Rib/Diaphragm plate effect

Is it possible  STAAD Pro V8I SS5 to design as Plate fab beam ( I section in particular ) with taking effect of ribs / diaphragm plates in consideration . For now I am defining I section as 'Tapered' section or in section wizard which takes only cross section into account.

This shall be useful particularly at girder support locations where beam fails in Shear.