1. Home
  2. TRID
  3. View Record
https://www.nationalacademies.org/trb/events

COMPLETE ASSEMBLY OF STEEL HATCH COVERS AND HATCH COAMINGS PRIOR TO FITTING ON SHIPS

Previously hatch coamings were erected on the decks of the ships before launching. After launching, hatch covers and fittings together with seal bars, rails, oil jacks and pipes were installed and completed on board. On completion hose testings and operation tests were carried out before inclining test and sea trial. In view of the critical planning and processing required within the overall schedule of the ship in the above method of installing coamings and covers, the authors have endeavoured to improve on this method as follows. The unit consisting of the hatch coaming and steel hatch covers completed and fittings located in place. The units are constructed in the assembly areas of the shipyard and erected on the deck before launching. Therefore, work on fittings can be commenced soon after launching. Due to the adoption of this method the authors succeed in completing hatches etc. about two weeks earlier than by previous method, together with an approximate reduction in cost of 40%. At the beginning the author's concern was primarily about quality, and in particular deformation on completion of installation. It was found on completion that deformation was so slight that it could be ignored, proving the quality of the new system.

  • Availability:
  • Corporate Authors:

    Kansai Zosen Kyokai, Osaka University

    Aza-yamadaue, Suitashi
    Osaka,   Japan 
  • Authors:
    • Okamoto, J
  • Publication Date: 1972-9

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00084506
  • Record Type: Publication
  • Source Agency: Japan Shipbuilding Industry Foundation Library
  • Report/Paper Numbers: No. 145
  • Files: TRIS
  • Created Date: May 19 1975 12:00AM