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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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