Abstract: A space divider system which includes a plurality of posts and at least one beam assembly wherein the posts and beam constitute a raceway for receiving electrical and communication wiring for the transmission of electrical energy at work table height and wherein the posts and beam constitute a rigid structure for supporting various components such as lighting, acoustic panels, table and work surfaces, file storage bins and the like. Means are provided for interconnecting said posts and beam or beams in a manner facilitating the passage of wiring therebetween and addition means are provided within said posts for levelling a beam supported therebetween.