Council on Tall Buildings and Urban Habitat
Meetings with Façade Industry Representatives in Japan
April 16 – 23, 2018

See more on the research project
See more about the CTBUH Research Division
See more on CTBUH Research Division's Trip to Japan

OSAKA – Angela Mejorin, of the CTBUH Research Division, visited the General Building Research Corporation (GBRC) of Japan.The Corporation was officially authorized as a non-profit foundation in 1964 by the government, with the mission to promote public welfare by improving the quality and ensuring the safety of buildings, based on a wide-range of research, testing and evaluating activities related to building technologies. The GBRC has upheld their reputation by conducting strict and fair analyses on the activities related to overall building technologies. Yasushi Tsukamura from the GBRC organized the visit to their Cladding and Curtain Wall Test Lab and Toshiyuki Kanyama, the Wind Engineering Lab Manager, presented their activities.
Angela Mejorin (center) with Toshiyuki Kanyama (right) and Yasushi Tsukamura (left) of the General Building Research Corporation of Japan, Osaka

Their equipment includes an air cannon to conduct the missile impact tests, which simulate the wind-borne debris of the typhoon-prone regions. Furthermore, they have a pressure chamber to conduct the positive and negative pressure cycling test. This allows them to conduct the entire test procedure according to the ASTM or ISO standards for typhoon-resistant façades.

TOKYO – Upon arriving in Tokyo, the CTBUH Research Division and Shuji Miyamoto, Sales Manager of Trosifol, visited the Japan Sash Manufacturer Association (JSMA) - Windows & Doors - which has representatives from the four principal Japanese façade suppliers: YKK AP Inc., LIXIL Corporation, Sankyo Tateyama Aluminium, and Fujisash Co. Ltd. Akira Kudou, Standardization Project Manager and ISO/TC 162 Secretary, and Fumihiko Chiba, Manager at the Central Research Laboratory of YKK AP Inc., organized the meeting. The curtain wall experts explained the Japanese best practices for curtain wall design and testing procedures for constructions prone to strong winds. They illustrated their guideline and the minimum safety requirements for façades that have to frequently experience typhoon events. Furthermore, they presented the equipment and testing facilities that the principal Japanese curtain wall suppliers have in their own factories in order to verify before the their products are installed in real buildings.
Japan Sash Manufacturer Association (Windows & Doors). Back row, from left to right: Mr. Kudou, JSMA; Mr. Chiba, YKK AP Inc.; Mr. Takai, Curtainwall Fire Window’s Association; Ms. Mejorin, CTBUH; Mr. Egusa, JSMA; Mr. Ogawa, JSMA. Front row, from left to right: Mr. Ono, Lixil Corporation; Mr. Kurihara, Fujisash Co. Ltd.; Mr. Chikaoka, JSMA.
Next, Angela Mejorin and Shuji Miyamoto had a meeting at one of the most important Japanese general contractors for the tall building construction, the Takenaka Corporation. Here, Dr. Masayoshi Nakai, Deputy General Manager of the Engineering Department, and Dr. Hideo Oka, Senior Manager and representative of the Spatial Technology Group of the Engineering Department, discussed performance-based wind-resistant design for the Japanese tall building construction. They elaborated on the minimum safety requirements, based on the Architectural Institute of Japan Recommendations for Loads on Buildings and the Building Standard Law of Japan. Furthermore, CTBUH had the opportunity to ask some questions about Japan's tallest building, Abeno Harukas, which will be included as a building case study in the technical publication ‘Strong Wind- and Cyclone-Resistant Façades: Best Practices’.
Fukoku Seimei Building, Osaka
View of the Grand Front Osaka, from the Umeda Hankyu Building