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JAS Dimension Lumber Standard Committee Invites Canadian In-Grade Test Authority

Hidehiko Fumoto

By Hidehiko Fumoto

Deputy Director and Manager Technical Services, Canada Wood Japan

July 4, 2013

fumotoAs reported earlier in this blog (, the Japanese domestic lumber industry is requesting for the JAS dimension lumber standard (JAS600) to include Sugi in the SPF species group.  The addition of species other than SPF would result in the loss of the basis for the statistical population of the Canadian in-grade test that was referenced for SPF design stresses derivation Japan.  It therefore became necessary to provide the committee with the information on why and how the characteristic properties of Canadian SPF were introduced to the current JAS600 design stresses.  The Ministry of Agriculture, Forestry and Fisheries (MAFF) decided to invite Dr. J. David Barrett, Emeritus Professor of UBC, to JAS 600 revision committee meeting on June 25th expecting the updates by a world-famous authority of In-grade tests.  In an approximately 1-hour presentation, Dr. Barrett briefed the committee with sampling philosophy, testing methods, property adjustment models and JAS600 SPF standard strengths.  This was received as quite valuable input where the committee members were able to learn what is lacking in the domestic lumber test.  It is now anticipated that the committee would change the direction so that Sugi cannot be included in the SPF species group.  The committee Chair Dr. Nagao asked Dr. Barrett for the continuous follow-ups.