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
      • Common Framing Errors
    • 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
      • Basics of Construction
      • Builder Tips
      • Wood University
      • America Latina
      • Webinars
      • Glossary of Terms
      • 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
      • Retrofits and Remodels
      • Schools
      • Shear Walls & Diaphragms
      • Transportation Structures
    • Design Solutions
      • Build A Better Home
      • Force Transfer Around Openings
      • Energy Efficiency
      • Green Building
      • Wind, Weather & Seismic
      • 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
        • Annual Report
        • 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 & Health Links
    • Directory
      • Manufacturer Directory
    • Industry Partners
      • Engineered Wood Technology Association (EWTA)
      • U.S. Forest Service Forest Products Lab
      • Industry Links
    • 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
    • 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
  • Sign In

    • Recover Password   Register


    Careers at APA2022 Health And Safety Awards Program Winners APA Glulam Product GuideFire-Rated Systems in Wood Construction Webinar APA CAD Details

    Recent Publications

    9.20.23 Plywood Design Specification, Supplement 4-23: Design and Fabrication of Sandwich Panels

    8.23.23 Plywood Design Specification, Supplement 3–23: Design and Fabrication of Plywood Stressed-Skin Panels

    7.28.23 Technical Topics: Collector Design for Wall Bracing in Conventional Construction

    7.25.23 Plywood Design Specification, Supplement 2-23: Design and Fabrication of Glued Plywood-Lumber Beams

    REGISTER NOW
    to download publications

    APA NEWS

    07.25.23 2022 APA Safety and Health Award Winners Announced

    05.23.23 New Trustee Joins APA Board

    5.17.23 APA Releases 2023 Structural Panel & Engineered Wood Yearbook

    EDUCATION & EVENTS

    Wall Bracing Webinar Series
    Satisfying the wall bracing requirements of the 2018 IRC.

    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.

    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.

    CONTACT HELP DESK >

    APA REGIONAL REPRESENTATIVES

    Get help from your local APA Engineered Wood Specialist, offering free consultations for construction professionals.

    GET HELP >

    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.

    FEATURED RESOURCE

    Free CAD DetailsGO >
    Nearly 200 free CAD details for wood-frame construction. Available for download as DWG, RVT or PDF files.

    Technical Research & SPECIAL PROJECTS SEE ALL >

    Evaluation of Fire-Retardant Treated Structural Glued Laminated Timber GO >

    Field Moisture Performance of Wood-Framed Walls with Exterior Insulation in a Cold Climate GO >

    Hygrothermal Modeling of Wall Drying after Water Injection GO >

    ABOUT APA | À PROPOS DE L’APA

    • View the APA Fact Sheet | Consultez la fiche de renseignements d'APA
    APA Product Support Contact Us Terms Of Use Site Map
    Facebook Twitter LinkedIn YouTube
    © 2018 - 2023 APA – The Engineered Wood Association. All Rights Reserved.