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NLGA SPS-3 and ALSC PS-20 are the two standards that govern the manufacture of fingerjoint studs in North America. They are written into all the major North American building codes.
NLGA SPS-3 was developed by the National Lumber Grades Authority (NLGA) in New Westminster, Canada. It was one of the first certified rules-writing agencies to develop fingerjoint lumber manufacturing standards. NLGA's SPS 3 covers quality standards for 'vertical use only' product grades. This standard is, in turn, adopted by ALSC PS-20, which provides the basis for policies and procedures developed by the American Lumber Standard Committee and is enforced through the Board of Review. ALSC PS-20 is published by the National Institute for Standards and Technology (NIST) operating under the U.S. Department of Commerce.
Japan Agricultural Standards (JAS) Law is a series of quality standards published by the Japanese Ministry of Agriculture, Forestry and Fisheries. It sets the specifications that must be met by fingerjoint manufacturers servicing the Japanese market.
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