HAWSER SYSTEM DESIGN FOR SINGLE POINT MOORINGS

This paper presents design information for mooring hawsers for single point moorings. It is based on a recent study, conducted by Exxon Research and Engineering for the U.S. Coast Guard, which will serve as a guide for the evaluation of SPMs used at U.S. deepwater ports. Information from many sources has been drawn together and analyzed to present a comprehensive study of synthetic rope properties of interest in SPM design. Much of the information has not been published before. Properties of nylon, polypropylene, and polyester fibers, and the types of rope construction used at SPMs are discussed. The elasticities of ropes of various materials and constructions are compared. The methods which are used to rate large-rope breaking strengths are evaluated. Factors which affect new and used SPM hawser strength are discussed. Chafing chains, hawser floatation devices, and the methods by which hawsers are attached to the tanker are also discussed. Recommendations are made for SPM hawser material and construction. Factors of safety for SPM hawser design for U.S. deepwater ports are also recommended. These factors of safety are higher than those previously adopted by the industry. The data and findings presented in this paper will be of interest to SPM designers and operators and to other users of large-diameter synthetic rope.

  • Supplemental Notes:
    • Presented at the 10th Annual OTC in Houston, Texas, May 8-11, 1978.
  • Corporate Authors:

    Offshore Technology Conference

    6200 North Central Expressway
    Dallas, TX  United States  45206
  • Authors:
    • Woehleke, S P
    • Flory, J F
    • Sherrard, J R
  • Publication Date: 1978

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00178169
  • Record Type: Publication
  • Source Agency: Offshore Technology Conference
  • Report/Paper Numbers: OTC 3156, Vol 2 Proceeding
  • Files: TRIS
  • Created Date: Jul 19 1978 12:00AM