Abstract: Improvements to modular furniture systems comprising furniture modules and a support structure. The support structure comprises vertical jambs. The jambs are connected by a top horizontal panel and by a bottom panel as well as by a plurality of intermediate horizontal elements located at respective heights intermediate said top and bottom elements. The intermediate horizontal elements are adapted in stiffness and bending resistance so as to support at least one furniture module. Each constituent furniture module is hung directly on a respective one of the intermediate horizontal elements.