| 摘要 |
A track rail (46) forming part of a track assembly (14) for a sectional door (13) for movement between closed and open conditions. The track rail (46) comprises an elongate body (80) having a longitudinal web (81) and two opposed longitudinal sides (82, 83) which cooperate to define a channel interior (84). The longitudinal web (81) is configured to define a longitudinal space (92) adjacent to and opening onto the channel interior (84). |
