APA – The Engineered Wood Association Skip over navigation

The leading resource for information about engineered wood products

  • Technical Research
  • Manufacturer Directory
  • Contact
  • Products
    • Plywood
    • Oriented Strand Board (OSB)
    • Specialty Panels
      • Concrete Form Panels
      • Overlaid (HDO/MDO)
      • Siding
      • Radiant Barrier Panels
      • Industrial End-Use
    • Glulam
    • I-Joist
    • Rim Board
    • Cross-Laminated Timber (CLT)
    • Structural Composite Lumber (SCL)
      • Laminated Veneer Lumber (LVL)
      • Parallel Strand Lumber (PSL)
      • Laminated Strand Lumber (LSL)
      • Oriented Strand Lumber (OSL)
  • Resource Library
    • Search
      • All Publications
      • FAQ
    • Publication Categories
      • Builder Tips
      • Case Studies
      • Design & Construction
      • Green Verification Reports
      • International
      • Non-Construction
      • Product Reports
      • Product Standards
      • Products & Grades
      • Research Reports
      • Technical Notes
      • Technical Topics
      • System Reports
    • Resource by Format
      • Publications
      • CAD Details
      • Photography
      • Video
    • Educational Resources
      • Wood University
      • America Latina
      • Webinars
      • Glossary of Terms
      • Mobile Builder Tips
      • Industry Links
      • Market Research
    • Periodicals
      • E-Newsletters
      • Engineered Wood Journal
  • Design & Build
    • Residential Building
      • Floors
        • I-Joist Fire Assemblies
        • Underlayment/Subfloor
        • Raised Wood Floors
        • Premium Floor Assembly
        • High Moisture and Wood Flooring
      • Walls
        • Fully Sheathed Walls
        • Advanced Framing
        • Wall Bracing
        • Wall Bracing Calculator
      • Roofs
      • Mobile Builder Tips
    • Commercial Building
      • APA Designers Circle
      • Bridges
      • Churches
      • Hotels & Resorts
      • Low-Rise Construction
      • Mid-Rise Construction
      • Panelized Roofs
      • Post Frame Construction
      • Schools
      • Shear Walls & Diaphragms
      • Transportation Structures
    • Design Solutions
      • Build A Better Home
      • Force Transfer Around Openings
      • Energy Efficiency
      • Green Building
      • Wind, Weather & Seismic
      • Carbon Challenge
      • The Inside View Project
      • Fire-Rated Systems
      • Noise-Rated Systems
      • Case Studies
    • For The Homeowner
      • Moisture Mitigation
      • Home Projects
      • Hurricane Shutter Designs
    • Industrial Applications
      • PerformancePanels.com
  • About Us
    • APA Information
      • APA Overview
        • Vision & Mission
        • Services
        • History
        • Contact Us
          • Staff Contacts
          • APA Help Desk
      • Jobs at APA
      • Board & Committees
      • APA Trademark
      • Standards & Accreditations
      • Technical Research
    • News
      • News from APA
      • Newsletters
      • APA in the Media
      • Photo Library
    • Safety & Health
      • APA Safety & Health Program
      • Awards Program
        • Award Winners
      • Innovation in Safety
      • Safety Alerts
      • Safety & Health Links
    • Directory
      • Manufacturer Directory
    • Industry Partners
      • Engineered Wood Technology Association (EWTA)
      • U.S. Forest Service Forest Products Lab
      • Industry Links
    • Events
      • Upcoming Events
    • International Services
      • International Services Overview
      • Websites & Resources
      • Publications
      • America Latina
    • Member Login
      • Sign in
      • Register
  • Featured Sites
    • Free CAD Details
      • CAD Logo
    • Panels For All Applications
      • Performance panel logo
    • Continuing Education
      • Wood University Logo
  • Build A Better Home
    • Foundations
    • Walls
    • Roofs
    • Controlling Mold and Mildew
    • Links & Resources
  • Glulam
    • Commercial Building Design
    • Residential Construction
    • Stock Glulam Resources
    • Design Properties
    • Sourcing Glulam Products
  • Technical Research
    • About Testing & Research at APA
    • Current APA Research
    • USDA Forest Service Forest Products Laboratory
      • Research in Progress
      • FPL Newsline
    • Special Projects & Demonstrations
    • Technical Papers
  • Walls
    • Advanced Framing
      • Advantages of Advanced Framing
      • Components of Advanced Framing
      • CAD Details
    • Wall Bracing
      • Detailed Bracing Information
      • APA Simplified Wall Bracing Method
      • Wall Bracing Calculator
    • Wind, Earthquake, & Weather Resistance
  • The Inside View Project
  • Sign In

    • Recover Password   Register


    Earn free CEUs with APA Webinars, ICC and AIA approved 10 benefits of wood structural panel wall sheathing Fire-Protective Assemblies and Firefighter Safety Air Sealing ICC Bracing Book

    Recent Publications

    4.17.19 Fire Protective Options for I-Joist Floor Systems

    4.2.19 APA System Report SR-405: Fire Protection of Floors

    3.1.19 PRR-401 Performance Standard for APA Rim Boards

    2.7.19 Effect of Large Diameter Horizontal Holes on the Bending and Shear Properties of Glulam

    REGISTER NOW
    to download publications

    APA NEWS

    4.9.19 After the Storm

    4.9.19 APA Releases 2019 Structural Panel & Engineered Wood Yearbook

    1.7.19 New Trustees Join APA Board

    11.30.18 APA Releases Updated Wall Bracing Calculator

    11.5.18 APA's 13th Annual Bronson J. Lewis Award Honors Mary Jo Nyblad

    9.21.18 A Wood Building At Home on Its Site: First Tech Federal Credit Union Finds Mass Timber Affordable Choice

    EDUCATION & EVENTS

    APA Webinars
    Upcoming and recorded webinars, including opportunities to earn CEUs.

    "Back to Basics" Engineered Wood Products Training
    On-demand training on specifying, handling, storing, and applications of EWPs.

    Upcoming Events
    Browse upcoming seminars, webinars, conferences, symposiums, and meetings.

    Codes & StandardsSee All >

    ANSI Standard Development
    APA is accredited by the American National Standards Institute (ANSI) to develop national consensus standards for engineered wood products.

    APA Product Reports®

    APA System Reports

    Green Verification Reports

    APA HELP DESK

    The APA Product Support Help Desk can answer your questions about engineered wood products, systems and applications.

    Call 253.620.7400 or contact us online.

    ABOUT APA

    • View the APA Fact Sheet
    • Consultez la fiche de renseignements d'APA

    FEATURED SITES

    Performance Panels GO >
    Non-construction applications of engineered wood panels, with detailed product information and manufacturer directory.

    Wood University GO >
    Wood University courses are constructed to give you the knowledge you need to better specify, utilize, or sell engineered wood products.

    APACAD.orgGO >
    More than 250 free CAD details for wood-frame construction. Detalles ahora disponibles en español.

    Technical Research & SPECIAL PROJECTS SEE ALL >

    Research / Force Transfer Around OpeningsGO >
    Force distribution shear wall openings

    Research / Wood Structural Panel & Foam InsulationGO >
    Evaluation of performance under code requirements

    Research / Creep Performance for Structural Insulated PanelsGO >
    A preliminary study

    APA Product Support Contact Us Terms Of Use Site Map
    Facebook Twitter LinkedIn YouTube
    © 2018 - 2019 APA – The Engineered Wood Association. All Rights Reserved.