NoteThe drawing is not to scale.
|
A |
Sonar room (watertight compartment) |
|
G |
Strengthening knee plates (stiffereners) |
Important
The installation trunk must be secured to the bulkheads and/or the hull by means of strengthening plates (stiffereners). The dimensions and strength of the plates must be adequate to prevent any vibrations. This is an invariable requirement to ensure the safety of the SU90 system and the vessel.
The shape and locations of the strengthening plates must be determined by the installation shipyard based on the physical
properties of the installation trunk, the hull and the space available. Minimum four strengthening plates must be used. Each strengthening plate must extend all the way from the bottom to the top of the installation trunk. Only leave a small gap to allow access to the bolts and nuts used to secure the mounting flange. The minimum plate thickness is 10 mm, but the classification society can specify other dimensions.