Provided are stowage bin systems for use on aircrafts and other like vehicles. A stowage bin system may include two disjoint supporting panels and a stowage bin bucket disposed between and pivotally supported by these panels after installation. The supporting panels may be attached to vertical frame members and, in some embodiments, to other frame members, such as adjacent vertical frame members or to horizontal frame members. In some embodiments, a supporting panel may include a gusset extending substantially normal to the main surfaces of the panel. The gusset may provide additional rigidity to the panel and, in some embodiments, include one or more open channels for attaching to a horizontal frame member. The supporting panels transfer all loads generated during operation of the aircraft from the stowage bin bucket and to the fuselage or, more specifically, to vertical and other frame members.