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    • Introduction

    • Glossary

    • Purpose of this Guidance Note

    • Safety and Environmental Issues

    • Equipment

    • Specification, Design and Fabrication of Concrete Mattresses

    • Handling, Deployment, Installation, Repositioning and Decommissioning

    • Anti-Scour and Fronded Mattresses

    • References

    • Appendices

      • Tick Box Checklists

      • Example Drawings

    Date: Reason: Revision:
    Date:February 2024 Reason:Updated to include systems for handling multiple concrete mattresses Revision:Rev. 2
    Date:September 2011 Reason:Updated to include reference to the use of ROVs in mattress handling Revision:Rev. 1
    Date:November 2007 Reason:Initial publication Revision:Rev. 0

IMCA documents

Find out more about the different types of document.

Our Guidance documents are categorised as follows:

  • Code of Practice – Its uniform application is recognised as essential for the safe and efficient conduct of marine contracting projects. IMCA expects the highest level of compliance with this category from its Members.

  • Recommended Practice – Its uniform application is recognised as necessary for the safe and efficient conduct of marine contracting projects. IMCA expects a high level of compliance with this category from its Members.

  • Informative Guidance – Its application is recognised as useful for the safe and efficient conduct of marine contracting projects. IMCA expects its Members to take appropriate account when planning, managing, and conducting their marine contracting projects.

Our Information Notes covering safety, technical, regulatory, commercial and various other issues relevant to its Members. Non-members can explore a small number of individual articles deemed of broader industry interest.

Anyone working for a Member company has unlimited access to our entire library of documents. This degree of transparency and ready-availability ensures that contractors, suppliers, and operators always have access to them and are aligned on the latest industry good practice.

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