What is the minimum depth that door guides for horizontal sliding doors must be within the sill groove?

The minimum depth that door guides for horizontal sliding doors must be within the sill groove is established to ensure proper alignment and functionality of the door system. A depth of 1/4" within the sill groove allows for adequate stabilization and guiding of the door as it slides open and closed. This depth is sufficient to prevent the door from disengaging or becoming misaligned during operation while also allowing for some wear over time.

Depths that are too shallow may not provide enough support, increasing the risk of the door jamming or malfunctioning. Conversely, excessively deep guides could interfere with the smooth operation of the door or complicate the installation process. Therefore, the requirement of a 1/4" depth strikes a balance that promotes both efficiency and safety in the operation of horizontal sliding door systems.