Mar 26, 2012. /Lesprom Network/. Weyerhaeuser is to start production of JAS (Japanese Standards Association) certified OSB for export to Japan, as TTJ reported. The products will serve both residential and commercial construction in Japan - wall and roof sheathing and as structural flooring panels. The Weyerhaeuser OSB mill in Hudson Bay, Saskatchewan, Canada will produce the material under a JAS certification received from APA – the Engineered Wood Association. The mill will use a proprietary formulation specifically engineered to meet JAS strength and stiffness criteria, as well as the stringent F4 requirements for formaldehyde emission levels. Production to this standard will begin in April with the first material arriving in Japan in May. “We are very excited to be entering the Japan market,” said Chad Kelly, Hudson Bay mill manager. “This is a great fit for us in terms of our wood supply and our production strengths. We have a 9in-wide press so we can produce 3in-wide material very efficiently.”