Simrad ST90 - Mechanical Support Brackets

114
442703/B
Mechanicalsupportbrackets
Duetoitsphysicalsizeandweight,andthefactthattheinstallationtrunkpenetratesthe
vesselhull,itisveryimportantthatthehullunitisinstalledandsecuredproperly.
AStrengtheningknee-plates(stiffereners)
BInstallationtrunk
Important
Thehullunitgantrymustbesecuredtothebulkheadbymeansofmechanicalsupport
brackets.Thedimensionsandstrengthofthesupportbracketsmustbeadequateto
preventvortexinducedvibration.ThisarequirementtoensurethesafetyoftheST90
andthevessel.
Theforcestowhichthehullunitisexposeddependsonthephysicalsizeofthe
installation,whereitislocated,andthevessel'sbehaviourinroughsea.Itisvery
importantthatthehullunitissufcientlysupported,astheforcesitisexposedtomay
affectboththephysicalinstallationandthevessel'ssafety.
Themechanicalsupportbracketsmustbedesignedandmanufacturedbytheinstallation
shipyardtotthecompleteinstallationinthesonarroom.Allcalculationsmadeto
supportthedesignmustmeettheapplicablesafetyrequirements,andapplytothe
physicalpropertiesofthehullandtheinstallation.
Note
Thenaldesignandtheinstallationmustbeapprovedbytheclassicationsociety.
Withoutapropermechanicalsupportforthehullunitgantry,theguaranteewillbevoid!
Relatedtopics
Mountingtheinstallationtrunk,page109
Installationtrunkmountingoverview,page110
SimradST90InstallationManual