Canada Wood Today | The Canada Wood Group

Midply Case Study Manual Completed

Hidehiko Fumoto

By Hidehiko Fumoto

Deputy Director and Manager Technical Services, Canada Wood Japan

April 1, 2014

fumoto1As one of the key Canada Wood technical development initiatives, COFI Tokyo has been working on Midply Wall System since 2010.  The Midply Wall System was originally invented in 1998 by Dr. Erol Varoglu of Forintek Corp (now FPInnovations) and Dr. Siegfried Stiemer of UBC.  Following a presentation by Dr. Chun Ni of FPInnovations on Midply to the Japanese housing industries and key wooden structure researches the project began.  Since then, COFI has been conducting several tests on Midply at an MLIT*1-designated laboratory and developing the evaluation results from the tests.  With the collaboration from structural engineering experts at Nihon System Sekkei, analytical studies on Midply structural behaviour have been presented at BRI*2 committee meetings.  As a result of these technical elaborations, the top structural researchers in Japan have now recognized Midply as one of the most effective solutions to accomplish mid-rise and large scale wooden structures.  This past year we initiated a project market called “Case Studies of Mid-Ply in Non-Residential fumoto2Applications” where model plans of a 6-storey condominium and a 3-storey elderly care facility were developed to incorporate Midply design and shear wall performance to encourage the commercial adoption of Midply in Japan.  We developed a 70-page manual and presented at a BRI committee meeting for 2×4 large scale structures on March 28.  The committee agreed to feature the Midply in the future editorial work for revising “Green Book”, known as a Bible for structural design of 2×4 constructions. This technical development work is expected to generate a realistic alternative to CLT in Mid-Rise applications and facilitate the expansion of dimension lumber use in non-residential applications.


1) Ministry of Land, Infrastructure, Transport and Tourism

2) Building Research Institute