OCIMF_Mooring_Equipment_Guidelines_(Second_Edition)

810

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ITEM OESCRIPTlON OlY

, F ABRICAlEl'l FRAME I

~ ItER1lCAL FRAME 2

3 VEmlCALROLLER 4

~ Tl1RtJST ~NG 2

(^5) HORIZONTAL l'IOtLER I
(^6) ItOI'IIZONTAL fIOLLER 1
-; HORiZONTAL PlN 2
8 HORIl. ROllER BUSH^4
9 VERTicAL PIN 2
10 TAP BOLT 4

2' WASHER^6

12 GREASE NIPPlE 6

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35"5

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FIGURE 5.3: UNIVERSAL FAIRlEAD WITH INDIVIDUAL END FRAMES

5.7 Special Considerat ions

The following is a discussion of some specific shipboard installalion problems:

5.7.1 Rounded Gunnel Conneclion

Most newer ships have a rounded connection between upper deck and side shell in the mid·body

area. The rounded pla!e is of a special steel grade to prevent propagation of major cracks in the

hull envelope. Some Classificat.ion Societies place restrictions on welding to this plate. Whatever

regulatory bodie,s may bave to say on this subject. welding to the plate is discouraged. especially if

the deck is of higher tensile steel. Since mooring chocks or fairlcads in the mid-body area should be

flush wit.h the side shell to avoid line chafing on the rounded gunnel. a cantilevered roundation for

all shipside mooring filtings wi.ll be required. Figures 5.1 and 5.2 show such an installalion.

5.7.2 Doublers Versus 11/serts

Deck plating in way of mooring fillings may be reinforced by doublers or insert plates. Doublers are

usuaUy less expensive but cannot transmit large tensile loads. This is because all loads to the deck arc

transmitted only t.hrough the fillet welds or plug welds of the doubler and these are seldom in line