1 .Following conditions need to be determined in order to choose a suitable fender system:
1）Effective berthing energy of vessel
2）Reaction force allowed by the berthing structure
3）Maximum hull pressure the vessel can withstand
4）Position and area for the fender system to protect
5）Natural environment (including wind, current and wave, etc.)
2 .Required information
1）Vessel type: general cargo vessel, oil tank, container ship, bulk cargo carrier, ferry, cruise and workboat, etc.
2）Weight: gross tonnage, dead weight tonnage, displacement, etc.
3）Length of vessel
4）Width of vessel
5）Depth of vessel
3 .Berthing structure
1）Type: wharf, jetty, pier, etc.
2）Construction: pile type, gravity type
3）Elevation: top deck ( plat form ) level, high water level and low water level For existing quay structure,
following additional information is also needed:
4）Space for fender installation at the relative elevation above sea level
5）Allowable horizontal impact force acting on the structure
4 .Natural conditions
1)Wind: direction and speed
2)Current: direction and speed
3)Wave: height, period and direction