A CONCEPT FOR IMPROVED CRANE PERFORMANCE IN OFFSHORE OPERATIONS

The United States forces have conducted exercises in order to explore through test and evaluation various techniques for unloading a containership moored offshore using full-scale equipment in a real environment. The primary difficulty encountered throughout the tests was the inability to place the container in the lighter with accuracy. Two of the problem areas identified were the swinging of a container suspended from a crane operating from a ship or barge in a seaway and the potential for impacts of the container when the crane lowers it onto the deck of a lighter responding independently to the seaway. This Report summarises various approaches and concepts for controlling container swing and impact caused by wave induced motion and examines the technical feasibility of two specific and promising methods: the rider block tag line system and the shock absorbing spreader bar.

• Supplemental Notes:
  • This report is available in Microfiche form.
• Corporate Authors:

  EG & G Washington Analytical Services Center, Inc

  2150 Fields Road
  Rockville, MD  United States  20850
• Authors:
  • Bonde, L
  • Dillon, D
• Publication Date: 1976-8

Media Info

• Features: References;
• Pagination: 78 p.

Subject/Index Terms

• TRT Terms: Cargo handling equipment; Container handling; Containers; Cranes; Loading and unloading; Offshore moorings; Waves
• Old TRIS Terms: Unloading systems; Wave effects
• Subject Areas: Freight Transportation; Marine Transportation; Terminals and Facilities;

Filing Info

• Accession Number: 00176843
• Record Type: Publication
• Source Agency: British Ship Research Association
• Report/Paper Numbers: HCG-TR-4694-0001
• Files: TRIS
• Created Date: Jun 14 1978 12:00AM