YCN 40 Front Loading Ribbon Window Wall with Can System WINDOW WALL SYSTEM Product Description The YCN 40 is an offset, front loaded ribbon window framing system designed for a clean, open look without exposed fasteners. Sill construction provides for positive weepage of moisture to the exterior. Known as a " Stacking " or " Can System, " the YCN 40 system offers the installers a way to save labor and cost. The YCN 40 system accommodates our hinged mullion, accepts 1/4 " and 1 " glazing, and is available for interior or exterior glazing. Product Options & Features n 2 " Face by 4 " Overall Depth n Inside or Outside Glazed n 1/4 " and 1 " Monolithic or Insulating Glass n Continuous Head and Sill Framing n Separate Interior/Exterior Finish Options