Mini tensioner

Layback over boarding chute

Cable chutes are often used on cable lay vessels for cable departure, but also for umbilical’s, winch wires, ropes or similar to be routed over the stern or vessel side.

The geometry of the chute is decided by the use, the minimum bending radius and the tension of the product going over the chute. Contact BEIN Engineering and our Cable Engineers will calculate and design the correct Cable Chute for your use.

An over boarding chutes is typically used for cables, umbilical, winch wires etc. routed over a vessels side during deployment or retrieval. Submarine cables used for export and import of electrical power, and optical fiber cables used for communication may be damaged during handling if the minimum bending radius is not kept within its limits. The over boarding chute provides support to avoid overbending a flexible product. The over boarding chute may also be used at cable production facilities and/or storage facilities where variation in elevations can cause a risk of exceeding the flexible products’ limitations.

The Layback cable over boarding chute is pre-installed / sea fastened at vessels’ deck prior to a cable lay operation or cable repair operation. The over boarding chute may also be mounted in a cable production facility, at a cable storage facility or at quay side in conjunction with on- or offloading from a cable installation vessel. Spooling operations e.g. from a cable reel to a cable basket may also require addition support for a flexible product. The Layback cable over boarding chute is often included in cable transportation line which includes cable support rollers, cable haulers, cable tensioners and other related equipment.

The Layback cable over boarding chute has a cost-effective design where dimensions and material are kept to a minimum. This is done through proper engineering, and this way the over boarding chute structure is optimized for use, handling, transportation, and storage. The over boarding chute structure is carefully analyzed and dimensioned by our experienced team of engineers in BEIN Engineering. Design loads are based on cable loads vessel accelerations and hydrodynamic loads. Applicable design loads and factors from DNV, NORSOK, or other may be used for the structural calculations. Friction loads from pulling the flexible product (cable, umbilical, other) over the over boarding chute may be a challenge for larger water depths causing high loads. Rollers are therefore often a good solution to reduce the required pulling force due to friction and to avoid damage to the product outer sheath.

Layback strive to make cost-effective and sustainable solutions for our clients. Low carbon footprint is in focus when designing our products.

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