Canada Wood Today | The Canada Wood Group

Midply-Infill P&B Shear Wall Test Successful

Hidehiko Fumoto

By Hidehiko Fumoto

Deputy Director and Manager Technical Services, Canada Wood Japan

November 6, 2017

In addition to Midply-related technical projects undertaken for PFC applications, Canada Wood Japan is conducting shear wall tests for Midply infill wall systems for post and beam applications.  This is the part of a joint COFI-APA-CFPA 2-year joint market access project.  After the pretests in September 2017, we finalized the test wall specifications and conducted the tests on 3 specimens at the Centre for Better Living (CBL) laboratory in Tsukuba City on 28th and 30th of October, 2017.  The Midply infill specifications include SPF 2×4 dimension lumber, 9mm-thick Canadian OSB and CN75 nails.  The infills are fastened to the P&B framing with 150mm-long wood screws called HQR.  Our target for this fiscal is to collect data necessary for seeking the shear wall multiplier 5.0: the highest value achievable under the MLIT* ministerial approval system.  Shear wall multipliers are defined in the Japanese building code and are the performance induces more use when the designers take a prescriptive design approach.  According to the interim report we received from the CBL, the test walls show that we have cleared the performance required to achieve a shear wall multiplier 5.0.

*Note

MLIT: Ministry of Land, Infrastructure, Transport and Tourism