Abstract: The system comprises a metallic channel framework formed of laterally spaced, vertical studs and vertically spaced, horizontal reinforcing channel members. Pre-finished gypsum board panels are equipped at the factory with suspending means comprising gang nail plates attached to the panel backs. At the job site, the upper ends of spring clips are inserted into shallow channels formed in the gang nail plates; the lower ends of the clips extend rearwardly and, when each panel is dropped into place against the framework, its clip ends engage the side lips of the reinforcing channel members to suspend the panel therefrom. The use of the inexpensive gang nail plates results in a cost saving which is applied toward including the reinforcing channel members in the structure, so as to obtain a particularly sturdy wall. Once suspended, the panels can be shifted laterally, allowing close abutment between adjoining panels to be achieved.