AN ATTEMPT TO CORRELATE SHIP CONSTRUCTION COSTS TO THE COMPLEXITY OF THE STRUCTURE

In an effort to decrease the number of structural parts by increasing the frame spacing, a particular ship, the Mariner Class dry cargo ship, exhibits somewhat diverging trends in the construction cost parameters. The cost of materials, expressed in terms of steel weight per foot of midship length, tends to increase with frame spacing. The rate of increase is however very small at low values of frame spacing. Direct welding costs, expressed in terms of weight of weld metal deposited per foot of midship length, also increase. The costs related to fabrication, erection, fitting, and aligning, given in terms of length of joints per foot of midship length, decrease with frame spacing. So do the costs associated with design, production planning, handling of materials and record keeping, which are given in terms of number of structural parts per foot of midship length. Due to the lack of satisfactory means of correlating the four cost parameters, no realistic and convincing total cost indication could be found. Some insight, however, can be gained about the behavior of the total construction costs by noting that the rate of increase for the increasing cost parameters, is smaller than the rate of decrease for the decreasing parameters. A conclusion can be drawn that the total costs of construction tend to decrease with increasing frame spacing.(Author)

  • Corporate Authors:

    University of California, Berkeley

    Institute of Engineering Research
    Bekeley, CA  USA  94720
  • Authors:
    • Ziedins, A
  • Publication Date: 1963-4

Media Info

  • Pagination: 62 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00026652
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: NA-63-2
  • Contract Numbers: MA-2620
  • Files: TRIS
  • Created Date: Mar 2 1973 12:00AM