scope:

The APA EWS Performance-Rated I-joist is an "I"-shaped prefabricated structural member using solid-sawn lumber or structural composite lumber flanges and structural-use panel webs bonded together with exterior adhesives. 

To be classified as an APA EWS Performance-Rated I-joist, the joist shall meet an L/480 live load deflection criterion for residential floor applications, in addition to meeting all other requirements of this standard. 

APA EWS Performance-Rated I-joists are intended for use as joists in residential floor construction. Products carrying the APA EWS Performance-Rated I-joist trademark are to be installed in accordance with recommendations published by APA - The Engineered Wood Association. 

APA EWS Performance-Rated I-joists can be used for applications other than residential floor construction provided that appropriate design properties of the I-joists are used in design. 

APA EWS Performance-Rated I-joists are intended for use in dry-service conditions where the average equilibrium moisture content of solid-sawn lumber is less than 16%. 

This standard provides an allowable span system for a series of APA EWS Performance-Rated I-joists used in residential floor construction. To qualify for trademarking as an APA EWS Performance-Rated I-joist, the I-joist shall demonstrate conformance to the performance requirements for the allowable span as well as the design properties set forth in this standard.