Abstract: An office space dividing system which includes rectangular post-supported panels having central cores and upper wire troughs. Each panel includes two stiles and upper and lower rails constructed of tubular metallic members having the same substantially rectangular cross-sectional configuration which includes a longitudinal channel. The stiles and rails are arranged to define four corners each having two adjacent unobstructed openings. A right angle reinforcing member is press fit into the adjoining openings to provide four square corners which are maintained by staking. The stiles and lower rail are oriented such that the longitudinal channels support the central core. The upper rail is inverted, with the longitudinal channel supporting the wire trough. A spanner extends across each post, between adjacent panels, from wire trough to wire trough. Post caps, panel caps, and four plastic corners on each panel complete the system.