What Is The Structure Of The Aft Peak?

The structure of the aft peak is usually reinforced because of the vibration caused by the propeller and equipped with a steering gear. The structure of the aft peak is different from that of the stern overhang. In the past, the stern of the stern of the stern was mostly oval or cruiser stern, and it was not only complicated, but also the interior components needed to be shaped according to the fan-shaped arrangement, making it difficult to manufacture and install. Now mostly adopt square boat stern, its tail seal plate is flat, simplify the arrangement of internal structure, construction also is easier.

floor

The solid floor should be set for each rib. The ribbed plate should be suitable for the ship shape, and the stern tube shall be at least to the stern tube. If the hull lines are not allowed to extend this way, the aft stern tube shall be fitted with an appropriate height plate. The upper and lower edges of the board shall be strengthened and fastened to the ribs.

The ribbed plate at and near the bearing post, stern post and rudder arm shall extend to the peak of the aft peak, and the thickness shall be increased; According to the arrangement, the classification society will consider the added amount. The ribs should be set with a reinforcement bar of no more than 800mm.

The ribs

The ribs shall extend to the deck above the waterline. The ribs shall be supported by one of the following structures:

1. The non-watertight platform shall have an opening with a total area of 10% of the platform area;

2. Side longitudinal girder shall be supported by the main support member of the side of the deck to support the above rib support structure should not be greater than 2.5m.

Platform and side girder.

The platform and side stringer in the aft peak shall be aligned with the components in the front area. The structural continuity between the aft peak and the aft peak should be guaranteed by a wide transition bracket if the above arrangement is not possible due to the hull lines and channel requirements. If the aft peak is adjacent to the side of the longitudinal frame, the side longitudinal of the stern tube shall be equipped with the transition bracket.

Longitudinal bulkhead

Non - watertight bulkheads shall be set at the center line of the upper part of the aft peak tank. If the stern extension is larger or the stern of the aft peak, each frame shall be equipped with stiffener. The maximum width is greater than 20m, and additional vertical swing bulkheads are required.

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