3105F.4.3 Tanker Contact Length
A continuous fender system consists of fender piles, chocks, wales, and rubber or spring fender units.
The contact length of a ship during berthing depends on the spacing of the fender piles and fender units, and the connection details of the chocks and wales to the fender piles.
The contact length, Lc, can be calculated using rational analysis considering curvature of the bow and berthing angle.
In lieu of detailed analysis to determine the contact length, Table 31F-5-1 may be used. The contact length for a vessel within the range listed in the table can be obtained by interpolation.
|VESSEL SIZE (DWT)||CONTACT LENGTH|
|1,000 to 2,500||35 ft|
|5,000 to 26,000||40 ft|
|35,000 to 50,000||50 ft|
|100,000 to 125,000||70 ft|
For discrete fender systems (i.e., not continuous), one fender unit or breasting dolphin shall be able to absorb the entire berthing energy.