| 摘要 |
A split mullion window frame has opposite frame members adapted for either attaching the window frame to adjacent building structure or to an adjacent such frame. Both frame members employ a nailing flange for attaching opposite sides of the frame to a building structure. According to the invention, outer portions of the nailing flanges are removable and the inner portion of one of the nailing flanges is offset so that, having removed the outer portions, the window frame members can be nested together with their respective inner flange portions overlapping. A second set of flanges is provided. They parallel the nailing flanges but are the same length as the inner portions of the nailing flanges. The second flanges are also mutually offset so as to overlap when the frame members are nested together, thereby forming a rigid interconnection between adjacent frame members of two windows mounted side-by-side without use of a separate mullion strip.
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