Abstract: A system of office furniture and files including combinations of tubular leg and other vertical and lateral members interconnected by orthogonal joint connectors and channels to structurally strengthen and aesthetically appoint the furniture pieces. The channels require no special mounting or alignment and are automatically positioned and retained to the tubular members and joint connectors. The channels include spaced upper and lower holes at each end, one of the holes being substantially equal to the outer diameter of the tubular member while the other hole is substantially equal to the inner diameter whereby the larger hole is positioned and slid over the tubular member and the smaller hole is rigidly sandwiched between an end of the tubular member and the connector joint whereby the channels are thereby and automatically positioned and rigidly retained in fixed, predetermined relationship to the tubular members.