The 3000 category features T-shaped climbing systems. The plants are thus guided upward and then horizontally over windows and doors, on both sides. The vertical area of the trellises is sometimes used only for the guidance of the trunk, which often remains leafless... then only one wire rope is needed there. Roses, grapevines, and clematis love several parallel lines (of rope), but climbers like wisteria require rather one-rope systems to prevent entanglement. Some plants, particularly twining types, come into the horizontal position only with increased effort; T-shaped systems are therefore only suitable in certain conditions. Learn more in the climbing plants and planning sections.