HEAVY LIFT - FROM CONCEPT TO INSTALLATION

This paper outlines design methods used for the development of safe lifting procedures for jackets and topsides. The usefulness, planning and execution of model tests are also discussed. To illustrate the value of detailed preparation and planning the lifting of a 9200t jacket and a topside module of 7200t are described. A discussion of design requirements for slings, spreader beams, sling laydown areas and lift trunnions is also included. The paper also considers the disadvantages associated with heavy lifts, in particular the increased difficulties with loadout and transportation. This is compared with the advantages of reduced offshore hook-up for modules and reduced in-place weight for jackets. Finally the paper considers the limitations on future operations. As well as crane capabilities, there are limits on loadout quays, local strength of cargo barges, crane vessel stability and sling manufacture.

• Supplemental Notes:
  • Offshore 93; 3rd Intl Conf; Installation of Major Offshore Structures and Equipment, 17-18 Feb 1993; London, UK. Sponsored by Inst Marine Engrs, UK & RINA, UK. Procs. Publ by Marine Management (Holdings) Ltd, UK, ISBN 0-907206-50-6. Ppr 5, p 47 [10 p, 3 ref, 5 tab, 6 fig]
• Authors:
  • Crowle, A P
• Publication Date: 1993

Language

• English

Subject/Index Terms

• TRT Terms: Building; Facilities; Heavy lift vessels; Installation; Lifting equipment; Offshore structures
• Old TRIS Terms: Heavy lift; Lifting tasks
• Subject Areas: Bridges and other structures; Construction; Maintenance and Preservation; Marine Transportation;

Filing Info

• Accession Number: 00707651
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM