Patent ID: 7134250

Claim:
A method of assembling a building panel, the method comprising the steps of: providing a collapsible frame of generally square or rectangular configuration, which is collapsible between a generally flat condition, and an erected condition, said frame including overlying top and bottom sheets that are generally parallel and spaced apart in said erected condition of said frame by two webs which are spaced apart to extend in generally parallel relationship lengthwise along opposite side regions of said frame, said webs extending substantially perpendicular to said top and bottom sheets in said erected condition and being disposed substantially parallel to said top and bottom sheets in said collapsed condition, expanding said frame to said erected condition and thereafter inserting reinforcing means between said top and bottom sheets, the reinforcing means and the wens extending lengthwise along entire lengths of the opposite side regions of said frame; and placing said erected building panel in an installed position in a building.