APA PRI-400 Performance Standard for Residential I-Joists

The APA Performance Rated I-joist is an I-shaped prefabricated structural member using solid-sawn lumber or structural composite lumber flanges and wood structural panel webs bonded together with moisture-resistant adhesives. This standard provides an allowable span system for a series of APA Performance Rated I-joists used in residential floor construction.

This publication is designed for: engineered wood manufacturers, building code officials

This APA standard provides performance criteria, qualification requirements and quality assurance information for APA Performance Rated I-joists used in residential floors.

Key sections include:

• Performance criteria and requirements

• Sizes and tolerances

• Allowable span

• Design properties

• Characteristic test values

• Qualification requirements

• Flange materials

• Web materials

• Adhesives

• I-joist products

• Quality assurance

• Qualification tests

• Product evaluation

• Quality assurance

• Trademarking

• Typical trademark examples

Published by APA — The Engineered Wood Association.