T-joint for cable trays with recessed, round, and unperforated side rails, featuring connector holes for connections, integrated joint connectors, designed for wide-span cable trays. It is shape-stable due to a rear-mounted support profile and riveted, upward-open C-profile rungs with a slot width of 16 mm, allowing for cost-effective production of 90° T-branches and intersections, dependent on width in the main direction, including proportionate fastening accessories made of hot-dip galvanized steel. The radii of the fittings are designed to allow cable installation according to DIN/VDE 0298 Part 3. Joints must be supported by an appropriate load-bearing structure nearby. Usable for wide-span cable trays WSL 150 and WSLM 150. Dimensions (approximate measurements) Height H (clear internal dimension) x Width B (clear internal dimension): 151.5 x 305 mm. Notch of the wide-span cable tray: 1003 mm + B. Length in the branch direction: 750 mm. Internal rail radius R: 500 mm. Material: Steel, hot-dip galvanized according to DIN EN ISO 1461.