Abstract: A glass guiding system is provided comprising first and second glass pieces, each having an inboard surface, a front edge and a rear edge. The system also includes a first guiding assembly comprising a guide bonded to the inboard surface of the first piece and a retaining structure having a channel to slideably retain the guide, wherein the rear edge of the first piece and the front edge of the second piece engage when the first piece is fully raised.

Abstract: A pair of rectangular sash, framing glass panes for normally closing an opening in a wall, overlap each other at one end, with one sash slidable horizontally relative to the other to open said opening. Each overlapping end includes a vertical sash rail provided with horizontally spaced inner and outer vertical flanges extending toward the opposite end of the sash that carries those flanges, with all of the flanges disposed between the rails. The inner flanges of the two rails are spaced apart and located between the outer flanges in overlapping engagement with them to interlock the two rails. Disposed in the space between the inner flanges is a pair of vertical weather-sealing strips, each of which is connected to a sash. The strips extend toward each other and into contact to form a weather seal between the rails.