NECESSITY OF PROPER LASHING OF CONTAINERS ON THE SHIP'S DECK AS PART OF OPTIMIZATION OF THE SEA VOYAGE

Large container vessels carry thousands of containers on deck and failure of the lashing system can cause enormous expenses as a result of damage and container loss. Many modern container vessels can carry up to 8,000 TEUs (Twenty-foot Equivalent Units) and at least one new vessel is being designed (Maersk line) that will carry 12,000 TEUs. This article describes container lashing systems that are exposed on a ship's deck and the relevant forces acting on the lash system during transportation at sea. The author discusses the recommended requirements of a container securing system, including reliability, simplicity, compatibility, flexibility, speed of use, ease of use, minimum maintenance, and cost efficiency; motions and forces at sea; and allowable forces on containers. The author stresses that the containers and their lashings have to withstand occasionally severe ship's motions due to bad sea conditions and enormous load passes through the lasting equipment. In the case of failure in the lashing system, the domino effect is often produced and damage to the containers can include container loss overboard (particularly from the outboard stack). The author concludes by recommending strategies including alternate ship design (fewer containers on deck, more containers under deck), cell guides on the deck, and specific lashing strategies involving twistlocks, lashing rods, and bridge fittings.

  • Availability:
  • Corporate Authors:

    University of Zagreb

    Faculty of Transport and Traffic Sciences
    10000 Zagreb,   Croatia 
  • Authors:
    • Radisic, Z
  • Publication Date: 2004

Language

  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 97-104
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00989046
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 2 2005 12:00AM