Same Size &
Type Mooring
E
g E
g
line _____
""'--
lOOT (981 kN)
A) Effect Of Mooring Line Material
150 T (1 471 kNl
B) Effect Of Mooring Line Length
Steel = 4 7T (461 kN)
POlypropyJene ~ 2T (2o kN)
Nylon ~ r T (10 kN)
NOT ACCEPT ABLE
< 25 T ( 245 kNl
SOT 1490 kN)
NOT ACCEPT ABLE
15oT(1 47 kN)
r----300mm Nylon", SOT (461 kN)
14--+-----200mm Nylon = 25 T (245 ~Nj
ACCEPTABLE
C) Effect Of Mooring Line Size
Note: All Loads Are Approximations
FIGURE 1.6: EFFECT OF MOORING ELASTICITY ON RESTRAINT CAPACITY
The effects of mixing wire and synlhelic fibre lines are shown in Fig. 1.4, by comparison of Cases
and 2. (Note [he low loads in fibre lines 2, 4, 11 and 13 and the increase in wire loads from a
ma_ximum of 57 tonnes (559 kN) to a maximum of 88 tonnes (863 kN).
The effect of line length on load distribution musl also be considered. Line elasticity varies directly
with line length and has a significant effect on line load. A .... ire line 60 m long will assume only
about half the load of a 30 m parallel and adjacem line of the same size, construction aDd material.