ISO Tc67/Sct/Wg7/Panel 10/Structural Strength Acceptance Criteria

Concerns over the suitability of some of the structural criteria contained in the SNAME T & R Bulletin 5-5A - LRFD [1] and 5-5B - WSD [2] were raised in a report to the HSE by PAFA Consulting Engineers.

This report has now been published in the HSE's OTO Series as OTO 2001 001 [3].

These concerns arose in connection with: environmental load factors in the LRFD code; associating welding residual stresses with slenderness values; formulations for prismatic and hybrid sections; the application to jack-up assessment of the ISO tubular member strength formulations proposed for fixed steel structures; and estimating split-tubular chord sections on standard tubular member criteria.

A presentation of these concerns to the ISO/TC 67/SC 7/WG 7 and OC7 panel meetings in April 2000, supported an investigation of these issues.

The first of these concerns, investigating the environmental load safety factor in SNAME 5-5A, was addressed in a report for the HSE, now published as OTO 2001 042 [4].