| 摘要 |
A cast-in concrete (1), lead-in system (2) for ceilings and walls having a trapezoidally corrugated sheet metal formwork (7) and including a lead-in sleeve (3) for receiving one of a tubular conduit and a cable and having at least three outer, circumferentially spaced from each other, fixing points (4a, 4b, 4c) for securing the lead-in sleeve to the trapezoidally corrugated sheet metal formwork (7), and at least two stiff looking elements (5a, 5b) each having a connection element (12) for a formlocking connection with the fixing points (4a, 4b, 4c) of the lead-in sleeve and a mounting element (6) for securing the locking element (5a, 5b) to peak regions (8) of trapezoidal corrugations of the trapezoidally corrugated sheet metal framework.
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