Whether you're designing a custom home, commercial building, multifamily project or mass timber structure, APA provides the technical information, design resources and expert support you need to specify engineered wood products with confidence. From structural details and code guidance to CAD files, technical publications, continuing education and expert support, APA helps you move projects from concept through construction.
Find hundreds of design guides, research reports, CAD details, technical notes, specification guidance and engineering publications.
Browse typical construction details for engineered wood applications, including downloadable CAD files for common assemblies and design conditions.
One of APA's most widely used technical references, covering wood structural panel design, engineered wood products, floor, wall and roof systems, lateral force-resisting systems, connection details and more.
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Technical studies that support APA publications and recommendations
Need help with a design question, code requirement or unusual project condition? APA's Engineered Wood Specialists provide free technical guidance on engineered wood products, structural applications and construction practices.
The APA Wall Bracing Calculator is a free tool that streamlines the process of calculating IRC wall bracing compliance
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Technical Guides - E30
This publication provides a comprehensive overview of engineered wood construction systems for residential, commercial and industrial buildings
Technical Guides - D510
This publication describes recommended design capacities (ASD) and design methods for wood structural panels manufactured under PS 1 and PS 2 and APA Performance Standard PRP-108.
Technical Note - Q225
This publication contains uniform load tables for APA trademarked wood structural panels that are manufactured and qualified in accordance with PS 1, PS 2 and APA PRP-108
Technical Guides - L350
This publication provides design and construction recommendations for engineered diaphragm systems in floor, shear wall and roof systems
Technical Topic - TT-100
This publication describes the use of portal-frame design in engineered applications and as bracing in conventional light-frame construction
System Report - SR-101
This report discusses using wood structural panels to resist uplift from wind, including resistance to lateral shear forces and wind pressure perpendicular to the wall
System Report - SR-102
This report provides an approach to meet the requirements of the 2024, 2021, 2018, 2015 and 2012 IRC simplified wall bracing (Section R602.12).
Data File - D350
This publication provides recommendations for the use of APA rim board in conjunction with fire-rated wall/floor assemblies, based on the US Forest Product Laboratory testing
Technical Guides - W305
This publication is a guide to cost-effective fire-rated wood and wood structural panel systems that meet code requirements
System Report - SR-103
This publication outlines a construction solution to meet the IRC’s lateral and wind uplift load requirements using wood structural panels with raised-heel, or energy-heel, trusses
Technical Topic - TT-006
This publication describes Tile Council of North America (TCNA) specifications for wood structural panel floor systems under ceramic tile, tested in accordance with ASTM C627
Builder Tip - R340
This publication provides an overview of selection, handling, installation and fastening of APA plywood underlayment.
Technical Guides - R330
This publication describes the key components of raised-heel trusses and identifies the advantages of using them in conjunction with continuous wood structural panel wall sheathing