CINTRAFOR

Working Paper Abstract

A Technical Assessment of the North American-Style 2x4 Residential Construction System in Japan

Ivan Eastin, Tom Ossinger, Roger Williams, Steven Shook, Robert Hashizume, Joseph Roos. (96 pp)

 

Anecdotal information from US architects and contractors with experience in residential construction projects in Japan indicates that Japanese construction professionals often do not fully understand the North American-style 2x4 construction system, and often employ construction techniques that can compromise the structural integrity and/or long-term performance of these homes. A recent study by CINTRAFOR estimates that 2x4 construction costs in Japan range from 2 to 2.5 times higher than in the US (Eastin et al. 1995), partly due to differences in the way that the technology and construction management practices are implemented in Japan. The CINTRAFOR study suggested that Japanese construction professionals could improve their cost effectiveness and improve the quality of 2x4 homes built in Japan by increasing their understanding of North American-style 2x4 construction technology and construction management practices.

This research project was designed to provide specific information about how North American-style 2x4 homes are built in Japan. The specific objectives of this research project were to:

  1. provide information to help Japanese construction professionals rationalize and reduce 2x4 construction costs through a more efficient transfer of North American-style 2x4 construction technology;
  2. identify areas where a more efficient transfer of North American-style 2x4 construction technology could help improve the structural integrity and long-term performance of 2x4 homes in Japan; and
  3. provide information to support the development and implementation of the 2x4 technology transfer program administered by the Washington State Department of Community, Trade and Economic Development.

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