ISO 19901-4:2025

Oil and gas industries including lower carbon energy — Specific requirements for offshore structures — Part 4: Geotechnical design considerations

This document contains provisions for geotechnical engineering design that are applicable to a broad range of offshore structures, rather than to a particular structure type. This document outlines methods developed for the design of shallow foundations with an embedded length (L) to diameter (D) ratio L/D < 0,5, intermediate foundations, which typically have 0,5 = L/D = 10 (see Clause?7), and long and flexible pile foundations with L/D > 10 (see Clauses?8 and 9).

This document also provides guidance on soil-structure interaction aspects for flowlines, risers and conductors (see Clause?10) and anchors for floating facilities (see Clause?11). This document contains brief guidance on site and soil characterization, and identification of hazards (see Clause?6).

This document can be applied for foundation design for offshore structures used in the lower carbon energy industry.

Edition	2025
Standard Part No	4
Published Date	2025
Published By	International Standardization Organisation
Page Count	226