Manufacturer Opposes APA I-Joist Standard To the Editor: The article "Engineered Wood Group Pushes Standard I-Joist Code" (Eight-Penny News, 5/95) presents the American Plywood Associations's perspective of the prefabricated wood I-joist issue. The APA is a trade association that would like to gain representation of the engineered wood products industry. Without their help, what we are doing is working, and it's working quite well. The article stated they are working to establish a standard for us. The prefabricated wood I-joist industry already has a "standard." Performance standard ASTM-A-5055 was accomplished by consensus from all the manufacturers working with technical representatives of both the wood products industry and building code agencies. It is a highly successful performance standard, with proven demonstration of quality and adequacy for both