What are the components called that guide the travel of window glass?

The components that guide the travel of window glass are referred to as "run channels." Run channels are specifically designed to provide a pathway along which the window glass moves when it’s being opened or closed. These channels help ensure that the movement is smooth and stable, preventing the glass from binding or snagging during operation.

Run channels can be found in various types of window designs, including sliding windows, where the glass panels slide along these channels, and they are crucial for maintaining the longevity and functionality of the window system. Proper installation and maintenance of run channels contribute to the overall effectiveness of window operation, and they play an essential role in ensuring that the window remains securely in place while still being operational.

Other mentioned components may refer to related aspects of window construction, such as lift channels, which can relate to the lifting mechanisms in sash windows, but they do not specifically describe the guides for the travel of the glass itself like run channels do.