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A |
Mechanical support brackets Due to its height and weight, the hull unit gantry must be secured to the bulkhead by means of mechanical support brackets. The dimensions and strength of the support brackets must be adequate to prevent vortex induced vibration. This a requirement to ensure the safety of the CS90 and the vessel.
If the hull unit is placed on a transducer dock and a gate valve, additional support brackets must be installed from the top
of the mounting flange to the bulkhead.
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E |
The location of four knee-plates (stiffeners) on the installation trunk is indicated. Stiffen the installation trunk in both the fore-and-aft and athwartship directions by welding strengthening knee-plates both to the trunk and to the doubling
plate. The shape and locations of the knee-plates must be determined by the installation shipyard based on the physical properties
of the hull and the space available. The plates must be at least 1.5 times as thick as the surrounding shell plating.
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The sonar room must be easily accessible using a suitable hatch or a door. The size of the hatch must allow the entire hull unit to be removed without being disassembled.
Typical minimum hatch size is: 1000 x 1000 mm.