Impact on water depth operating limits of reduced SNAME T&R Bulletin 5-5A environmental load factor γ 3 from 1.25 to 1.15
SNAME Bulletin 5-5 Guidelines and Bulletin 5-5A Recommended Practice for Site Specific Assessment of Mobile Jack-Up Units adopt the Load and Resistance Factor Design (LRFD) approach. Separate load factors are specified for dead loads, variable loads, environmental loading and dynamic loading. These factors were derived on the basis of assessments of four jack-up units considered in the original Joint Industry Project that led to the development of SNAME T&R Bulletin 5-5A. Recently, however, the SNAME OC-7 Panel North Sea Annex Sub-Committee has proposed that the environmental loading factor (y 3) presently incorporated in SNAME 5-5A for jack-up assessment be reduced from its current value of 1.25 to 1.15.
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