This paper analyzes the manufacturing of tee shapes for stiffening ship structures. The traditional method of deflanging hot- rolled beams (producing I/T shapes) has been compared to the practice of fabricating tee-shapes from plate. A prior review of design criteria for several stiffened plate structures showed that fabricated tees could replace I/T shapes, resulting in weight savings averaging 18%, while still maintaining required strength. An evaluation of methods to produce tee sections was undertaken, and the concept of "net shape" fabrication of tee stiffeners was discussed. Both fabricating and stripping methods were considered, including newer technologies such as plasma cutting and laser cutting and welding. Mock-up testing was performed using several candidate technologies and the results compared. Plasma-arc cutting reduced distortion on 12.2m (40 ft) test beams by 50% compared to oxyfuel methods. Economic analysis revealed that fabricated tees were less costly to produce than deflanged I-beams, and that handling functions were the greatest cost element of the traditional oxyfuel cutting methodology.

  • Supplemental Notes:
    • Ship Production Symposium, Commercial Competitiveness for Small and Large North American Shipyards; 25-27 Jan 1995, Seattle, Washington, USA. Sponsored and publ by SNAME, USA. Pprs. Ppr 4 [20 p, 33 ref, 7 tab, 16 fig]
  • Authors:
    • Blomquist, P A
  • Publication Date: 1995


  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717149
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM