Civil Engineering Reference
In-Depth Information
TABLE 8.2
All Load Factors Related to Platform Likelihood of Failure
Item
Factor
Effect Factor
Weight
Score
13
Design loading
To account for the effect that design loading has on the likelihood
of failure. This differs from the design practice factor, which
accounts for design details of the structure, such as joints and
framing schemes.
8
0
-
60
14
Marine growth
To consider the increase of platform likelihood of failure by
increased marine growth.
5
0
-
50
15
Scour
To account for the effect that scour has on the likelihood of failure.
6
0
-
60
16
Topside weight change To account for the likelihood of failure of the platform due to
changes in deck weight due to deck extensions, additional
equipment or change of use.
10
0
-
100
17
Additional risers,
caissons and
conductors
To account for the effect that additional risers, caissons and
conductors, over and above those that the structure was originally
designed for, have on the likelihood of failure of the platform.
10
0
-
100
18
Wave-in deck
To consider the increase of platform probability of failure as a result
of storm-wave crests
25
0
-
250
'
hitting the lower platform deck.
19
Earthquake
To account for whether design considered earthquake loads.
Penalizes platforms that have not been designed for earthquakes in
areas where earthquakes are likely.
8
0
-
80
Load only
—
subtotal
0
-
700
Total score
10
-
1700
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