Patent ID: 6079181
Filing Date: 2000-06-27
Classification: E04B

Abstract:
A method for assembling a knockdown unit, said knockdown unit including at least a first and a second vertical frame member, said vertical frame members consisting of either a vertical jamb or a vertical mullion each having a top end and a bottom end separated by an intermediate portion, and at least two horizontal frame members, said horizontal frame members consisting of at least one horizontal head frame member and at least one horizontal sill frame member each having a first end and a second end, and a horizontal mullion having a first end and a second end, the method comprising the following steps, wherein steps a, b, and c may be completed in any order:a) attaching the first end of said at least one horizontal head frame member to the top end of said first vertical frame member;b) attaching the second end of said at least one horizontal head frame member to the top end of said second vertical frame member;c) attaching said at least one horizontal sill member to said first and second vertical members;d) sliding the first end of said horizontal mullion into a corresponding cut-out portion of said first vertical frame member, said cut-out being located in the intermediate portion of said vertical frame member, said cut-out having an opening to allow horizontal entry of said mullion into said cut-out and onto a lower shelf for direct support of said first end of said horizontal mullion; ande) sliding the second end of said horizontal mullion into a corresponding cut-out portion of said second vertical frame member, said cut-out being located in the intermediate portion of said vertical frame member, said cut-out having an opening to allow horizontal entry of said mullion into said cut-out and onto a lower shelf for direct support of said first end of said horizontal mullion.