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APA - The Engineered Wood Association has made it easy to make the right choice for residential floor and roof joist products. ADI Power Joists are produced in accordance with the APA's PRI-400 standard. APA Performance Rated™ I-Joists (PRI™) provides a high performance alternative to dimension lumber joists for residential floor applications. This guide will help you effectively use ADI Power Joist by leading you through the simple steps of product selection, specification, and installation. The APA trademark signifies that the I-Joist manufacturer is committed to the strict quality standards of Engineered Wood Systems (EWS), a related corporation of APA, and that ADI's are manufactured in conformance with PRI-400, Performance Standard for APA EWS I-Joists. APA's rigorous program of quality verification and testing is designed to assure predictable product performance. PRI-400 brings product standardization while providing for a multitude of design and construction situation. The standard provides design information for numerous types and sizes of I-Joists. Because ADIs can be selected based on their allowable span for glued uniformly loaded residential floors, it is easy to incorporate them into your design. This guide explains residential floor and roof systems. Review by a design professional is required for applications beyond the scope of this document. Simple to specify. Easy to install. Less confusion. ADI Power Joists are the right choice for residential floor and roof construction. AF & PA Fire Rated Wood Floor and Wall Assemblies Certificate of Approval from Dept. of Building and Safety 
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