Accession Number:

ADA030365

Title:

A Concept for Improved Crane Performance in Offshore Operations

Descriptive Note:

Technical rept.

Corporate Author:

EG AND G WASHINGTON ANALYTICAL SERVICES CENTER INC ROCKVILLE MD HYDROSPACE-CHALLENGER GROUP

Personal Author(s):

Report Date:

1976-08-01

Pagination or Media Count:

77.0

Abstract:

The joint ArmyNavy Marine Corps Off-Shore Discharge of containership I and II OSDOC I and II TestEvaluation exercises were conducted in 1970 and 1972, respectively, in order to explore through test and evaluation various techniques for unloading containership moored offshore using full-scale equipment in a real environment. The primary difficulty encountered throughout the test was the inability to accurately place the container in the lighter. Two of the problem areas identified were the swinging of a container suspended from a crane operating on 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 summarizes 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 RBTS and shock absorbing spreader bar SASB. Conclusions and recommendations are provided.

Subject Categories:

  • Construction Equipment, Materials and Supplies
  • Marine Engineering
  • Logistics, Military Facilities and Supplies

Distribution Statement:

APPROVED FOR PUBLIC RELEASE