A vertical lift door travels immediately up the wall in an individual, straight motion. In contrast, a substantial lift door takes advantage of a combination of a horizontal track near the ceiling after which curves upwards to hug the ceiling, giving far more headroom underneath the open door. Perhaps https://www.vevioz.com/post/1345132_lametek-on-kotimainen-perheyritys-joka-toimittaa-laadukkaita-nosto-ovia-autotall.html