Canada Wood Today | The Canada Wood Group

All 2-Hour Fire Tests Completed with Success

Hidehiko Fumoto

By Hidehiko Fumoto

Deputy Director and Manager Technical Services, Canada Wood Japan

June 16, 2016

fumoto3COFI and the Japan 2×4 Home Builders Association have worked together to conduct a series of 2-hour fire tests for the PFC assemblies since the last fiscal year.  The partition walls and floor assemblies passed the test in May and June of 2015 and we continued the tests for exterior walls and party walls in April of this year.  The partition wall specifications consist not only of conventional PFC walls but also of midply wall system.  The last test took place on May 19th of this year at a furnace in Soka City, Saitama Prefecture.  The laboratory test reports are being prepared for completion by July.  With these reports, we will apply for 2-hour fire resistive ministerial approvals to Ministry of Land, Infrastructure, Transport and Tourism (MLIT).  The Japanese building code requires 2-hour fire rating of principal building parts when the number of storeys exceeds 4.  However, as for the building parts fumoto2within 4 floor levels from the roof top can remain as 1-hour fire resistive.  In other words, in case of 6-storey buildings, the 1st and 2nd storey levels have to be 2-hour fire resistive.  The PFC 6-storey demonstration house in BRI Tsukuba was built assuming that walls and floors are 2-hour fire resistive, but the ministerial approvals for those elements were not available at that time.  Therefore, the house was built as a demonstration specimen for research and did not require a building permit.  With the success of these aforementioned tests, the actual code recognition and construction of 6-storey PFC will shortly become a reality.