Abstract: There is provided a new and useful system for the construction of partition walls comprising: a floor channel adapted to be secured to a building floor; a ceiling channel adapted to be connected to a building ceiling; a series of rectangular panel assemblies each including a rectangular frame having top, bottom and side edges, a pair of rectangular panels secured to opposite sides of the frame, and a pair of adjustable support members associated with the bottom side of the frame; and wherein the side edges of the frame extend beyond the top and bottom edges thereof and include longitudinal recessed channels; and, an elongated spline including first and second lateral extensions adapted to connect two adjacent panel assemblies and to extend into the ceiling channel, the spline adapted to be moved laterally from a first position wherein the spline is contained entirely within the said recessed channel of one panel assembly to a second position wherein the first and second lateral extensions extend respectively

Abstract: There is provided a new and useful unitized panel assembly for partition walls comprising a frame structure comprising in open rectangular configuration top, bottom, and first and second sides each comprising a hollow member of rectangular configuration, each hollow member having first and second panel support faces joined by inner and outer webs, the faces having inner and outer surfaces and inner and outer edges, the outer web being spaced from the outer edges, the outer surfaces having a flange extending perpendicular thereto at the outer edges, a pair of rectangular panels secured to the support surfaces, and wherein the panels are adapted to fit closely within the flanges, and the extremities of the flanges are substantially flush with the outer surface of the panels.