Canada Wood Today | The Canada Wood Group

MLIT Evaluation Body Certifies High Performance Midply

Hidehiko Fumoto

By Hidehiko Fumoto

Deputy Director and Manager Technical Services, Canada Wood Japan

September 9, 2019

In recent years Canada Wood has been developing infill Midply shear wall systems to target increased market penetration of Canadian structural wood components in post and beam construction. We have recently attained an important milestone in certifying Hem-Fir (N) (Canada Tsuga) and OSB Midply infill walls for large scale and midrise rise post and beam applications. Based on shear wall test results obtained from in-fill type Midply with Canada Tsuga, we successfully obtained the voluntary evaluation certificate from Centre for Better Living (CBL) on July 26th or this year. The CBL is an MLIT*-designated performance evaluation body.  This certificate is an independent validation from expert judges that demonstrates how high performance Midply should be structurally designed in the large-scale post & beam wooden buildings.  It helps local building officials issue the building permits requiring the sophisticated engineering specifications.

Now that our high performance Midply shear wall for P&B has been approved by the evaluation body, we are preparing a structural design manual.  This is extremely important because the only structural design manual currently available for P&B is so-called HOWTEC’s “Gray Book” of which the scope is limited only to the shear wall factor 7.0 or less.  Our P&B Midply shear walls with Canada Tsuga performs as high as shear wall factor 10.0.  It is therefore important to develop a design manual alternative to the Gray Book to fully capture the benefits of this high-performance Midply shear wall system.

*MLIT: Ministry of Land, Infrastructure, Transport and Tourism