Abstract: A wall assembly is disclosed including a plurality of panels extending in a line. Each panel 12 has front and rear panel faces and two sides. The wall assembly also includes a bottom plate extending along lower edges of the panels and fixed thereto, and a top plate extending along upper edges of the panels and fixed thereto. The wall assembly includes a plurality of support posts positioned at spaced intervals along the wall. The panels define a recess in each side thereof and the recesses of adjacent panels open into each other to form a receiving channel. The support posts are received within the receiving channel as are service conduits and/or cables. The top plate is configured so that service cables/conduits can run along the top plate. The bottom plate and the support posts are mounted on a wall support that is conveniently a concrete slab.