| 摘要 |
A window sash frame comprises a horizontally extending upper rail comprising a first end and a laterally opposed second end. The upper rail further comprises an integrally formed upper wall, lower wall, intermediate wall, front wall, and back wall extending between the first and second ends. The upper wall, lower wall, and intermediate wall extend parallel to the horizontal plane. The front wall and back wall extend parallel to the vertical plane. The intermediate wall comprises an upper seating surface facing the upper wall. The upper wall, intermediate wall, front wall and back wall define a horizontally extending channel within the upper rail. A first opening is provided in the upper wall and provides access to the channel. The window sash frame further comprises a first latch bolt slidably received in the channel. |
