Provides technical information on foundation design of offshore installations, intended to be supported on the seabed. Foundations for piled and gravity offshore installations are included in this document, together with footings for mobile jack-ups and anchorages for catenary moorings. Should be read in conjunction with the background document "Background to guidance on foundations and site investigations for offshore Structures". Report of the Department of Energy Guidance Notes Revision Working Group, HMSO, 1986. Is based on guidance previously contained in section 20 of the Fourth Edition of the Health and Safety Executive's "Offshore installations: guidance on design, construction and certification" which was withdrawn in 1998. The withdrawal of the "Guidance" was not a reflection on the soundness (or otherwise) of the technical information it contained; some sections (or part of sections) of the "Guidance" are currently referred to by the offshore industry. For this reason, after consultation with industry, relevant sections are now published as separate documents in the HSE Offshore technology (OT) report series. Whilst the text has been reformatted for offshore technology publication, the technical content has not been updated.
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