(a) API RP 2A-WSD, Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms (as incorporated by reference in Sec. 250.198), requires that the design fatigue life of each joint and member be twice the intended service life of the structure. When designing your platform, the following table provides minimum fatigue life safety factors for critical structural members and joints. ------------------------------------------------------------------------
(1) There is sufficient structural The results of the analysis
redundancy to prevent catastrophic must indicate a maximum
failure of the platform or structure calculated life of twice
under consideration, the design life of the
platform.(2) There is not sufficient structural The results of a fatigue
redundancy to prevent catastrophic analysis must indicate a
failure of the platform or structure, minimum calculated life or
three times the design life
of the platform.(3) The desirable degree of redundancy is The results of a fatigue
significantly reduced as a result of analysis must indicate a
fatigue damage, minimum calculated life of
three times the design life
of the platform.------------------------------------------------------------------------
(b) The documents incorporated by reference in Sec. 250.901 may require larger safety factors than indicated in paragraph (a) of this section for some key components. When the documents incorporated by reference require a larger safety factor than the chart in paragraph (a) of this section, the requirements of the incorporated document will prevail.
Platform Verification Program