Attachment T-piece, with corrugated, round and unperforated side rails, with connector holes for the connection, with integrated joint connector, for wide-span cable trays, dimensionally stable thanks to a support profile attached to the rear and the riveted, corrugated and unperforated base, for the cost-effective production of 90° T-outlets and crossings, width-dependent in the main direction, including proportional fastening accessories made of stainless steel. The fitting radii are designed so that the cables can be laid in accordance with DIN/VDE 0298 Part 3. Joints must be supported in the immediate vicinity by an appropriate supporting structure. Can be used for: Wide span cable tray WRL 105... Wide span cable tray WRU 105... Dimensions (approx. dimensions) Height H (clear inside dimension) x Width B (clear inside dimension): 106.5 x 405 mm Notch of the wide span cable tray: 1003 mm + B Length in the outgoing direction: 750 mm Inner beam radius R: 500 mm Material: Stainless steel, material no. 1.4301, 1.4303