A C1 Wedge Connection™ uses a fork-shaped upper part and a shaft shaped lower part with radial elongated holes in both parts. A fastener assembly is placed in these holes. The fastener has an upper and lower block which move apart when two wedges are pulled together. This creates a pre-stressed interface (red) between the upper and lower part.
The main load fluctuations in the C1 Wedge Connection™ go through base material, resulting in a superior fatigue resistance. The ULS capacity of the connection is governed by the wall thickness of the lower tubular. Therefore, the C1 Wedge Connection™ can easily be scaled to load levels that exceed any bolted flange connection. This implies that the structure diameter may be reduced for the same overturning moment.
The symmetric design of the connection prevents opening under high load, simplifying design and sealing of the connection.