Window Rail
With grooves to hold panes, window rails form the top and bottom of the sash
On a window a rail is the horizontal part of the frame at the top and bottom of the sash. Rails contain grooves that hold the window panes. Muntins extend vertically from rail to rail.
The term "rail" isn't exclusive to windows — it's used extensively with furniture to reference horizontal parts.
Window locks can be placed on the rail.
Muntins extend up and down between rails.
Sponsored
