Technical Document Library
Research-Backed Guidance for Every Project
Research-Backed Guidance for Every Project
Technical Guides - E30
This publication provides a comprehensive overview of engineered wood construction systems for residential, commercial and industrial buildings
Excerpt - E30X-RC
This publication is an excerpt from the APA Engineered Wood Construction Guide, providing a description and application recommendations for engineered wood roof materials
Excerpt - E30X-WC
This publication is an excerpt from the APA Engineered Wood Construction Guide, providing application recommendations for APA wood structural panel wall sheathing.
Excerpt - E30X-FC
This publication is an excerpt from the APA Engineered Wood Construction Guide, providing information about floor framing and wood structural panel products
Excerpt - E30X-PSS
This publication is an excerpt from the APA Engineered Wood Construction Guide, providing product descriptions and specification recommendations for wood structural panels
Excerpt - E30X-GL
This publication is an excerpt from the APA Engineered Wood Construction Guide, providing a description and specification recommendations for glued laminated timber (glulam)
Excerpt - E30X-IJ
This publication is an excerpt from the APA Engineered Wood Construction Guide, providing a description and specification recommendations for I-joist
Excerpt - E30X-RB
This publication is an excerpt from the APA Engineered Wood Construction Guide, providing guidance on selecting and specifying rim board
Excerpt - E30X-SCL
This publication is an excerpt from the APA Engineered Wood Construction Guide, providing descriptions and specification recommendations for structural composite lumber (SCL)
Excerpt - E30X-CLT
This publication is an excerpt from the APA Engineered Wood Construction Guide, focusing on selecting and specifying cross-laminated timber for various building applications
Technical Guides - C800
Describes common engineered wood products: plywood, oriented strand board (OSB), I-joist, glued laminated timber (glulam), structural composite lumber (SCL) and rim board.
Excerpt - E30X-AFBS
Summary of special systems, including fire resistant construction, fire protected assemblies, wind-resistive roofs, energy conservation and panels over metal framing
Standards - ANSI/APA PRR 410
This standard provides requirements and test methods for qualification and quality assurance for performance rated engineered wood rim board.
Standards - ANSI/APA PRP 210-2024
This ANSI/APA standard provides requirements and test methods for qualification and quality assurance for performance-rated engineered wood siding.
Technical Guides -
A Guide to the 2015 IRC Wood Wall Bracing Provisions
Construction Guide - Z725
This publication discusses span ratings, installation details, cantilever designs, architectural specifications and engineering design properties for APA Performance Rated I-Joists
Construction Guide - R310
This publication provides an overview of commonly used wall systems and explains how wood structural panels can be used to meet fundamental requirements in wall applications
Construction Guide - R300
Provides specification recommendations for plywood and OSB floor systems, the APA Glued Floor System and installation recommendations for panel subflooring and underlayment
Technical Guides -
A Guide to the 2018 IRC Wood Wall Bracing Provisions + Free Digital 2021 Supplement
Construction Guide - R305
This publication provides specification recommendations for plywood and OSB roof systems and installation recommendations for panel roofs
Technical Topic - TT-040
This publication discusses the placement of holes in the webs of I-joists or rim board when used as blocking for lateral restraint of floor and roof joists
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
Build A Better Home - A530
This publication describes the primary sources of moisture intrusion in wood wall construction and recommends methods to prevent moisture penetration.
Case Studies - C440
This case study discusses how engineered wood products helped overcome structural, acoustic and cost challenges at a North Carolina senior living expansion project.
Standards - ANSI/APA PRS 610.1-2023
This standard covers the manufacturing, qualification, quality assurance, design and installation requirements for performance-rated structural insulated panels used in walls
Product Guide - X440
This product guide provides an overview of APA trademarked glulam and discusses design considerations, applications and specification
Standards - ANSI/APA PRG 320-2025
This ANSI/APA standard provides requirements and test methods for qualification and quality assurance for performance-rated cross-laminated timber (CLT).
System Report - SR-405
This system report provides guidance on fire protection of floors constructed with prefabricated wood I-joist assemblies that comply with 2015, 2018, 2021 and 2024 IRC updates
Technical Guides - X450
Describes the selection, specification, design considerations and allowable load tables for APA-trademarked glulam used in residential headers, floor beams and roof beams.
Technical Guides - W305
This publication is a guide to cost-effective fire-rated wood and wood structural panel systems that meet code requirements
Product Guide - K435
This publication describes the specification, advantages, applications and finishing recommendations of sanded plywood and includes trademark examples and explanations
Technical Guides - L350
This publication provides design and construction recommendations for engineered diaphragm systems in floor, shear wall and roof systems
Build A Better Home - A535
This publication describes several roof design and weatherproofing methods used to keep water out of a home’s interior.
Build A Better Home - A520
This publication details common sources of moisture, preventive measures and design details for multiple foundation types, including slab-on-grade, crawl space and full basement.
Construction Guide - M400
This publication explains the components of advanced framing in floor and wall framing, including illustrated construction details
Technical Guides - V345
This publication contains grade information, form maintenance recommendations, design information and case studies related to plywood concrete forming
Technical Guides - X505
This publication provides a list of engineered wood products and common construction terminology explained in easy-to-understand language.
Product Guide - E300
Describes the following for performance rated siding: face grades, textures and patterns; finishing; ordering/specifying; basic application recommendations
Technical Guides - Q250
Determine the type and spacing of siding fasteners to meet building code requirements when using wood structural panel sheathing as a nail base (also called nailable sheathing)
Construction Guide - R425
Describes several options that satisfy fire-protection provisions of the 2012, 2015 and 2018 IRC related to I-joist floor systems, including construction details
Technical Guides - T625
This publication provides design and fastening recommendations for installation of wood structural panels over metal framing in floors, walls and roofs.
Technical Note - R495
This publication discusses decay fungi and how to prevent/minimize degradation of wood through proper design, storage, construction and maintenance
Product Guide - B360
Describes high density overlay (HDO) and medium density overlay (MDO) plywood applications, properties and characteristics, and shop practice and finishing recommendations
Technical Guides - B707
Learn the APA research facility capabilities, including assembly-level testing of roof and floor building components and performance evaluation of lateral force resisting systems
Technical Note - J330
This publication addresses concerns related to formaldehyde in engineered wood products and explains their exemption from leading formaldehyde emission standards and regulations.
FAQ - X501
This publication provides guidance about the serviceability of wood structural panels (plywood and OSB) after exposure to high levels of moisture.
Technical Guides - V691
Discusses specifications and design details for the APA panel-deck block pallet, including load capacity, nailing schedules and materials handling system compatibility.
ESR Joint Evaluation Report - ESR-1405
Interfor, IB EWP Inc., Nordic Structures, Resolute Engineered Wood, Roseburg Forest Products Company, Stark Truss Company, Inc.
Case Studies - W170
This case study discusses two Washington school districts that creatively leveraged the benefits of exposed wood products in newly constructed schools.
Technical Topic - TT-098
This publication discusses the benefits of mulching construction-related wood scraps, including glued engineered wood products
Construction Guide - T300
This publication shows correct connections and common connection errors involving glued laminated (glulam) timbers
Technical Guides - M310
This publication illustrates nine construction details that improve wind resilience in residential construction, with real-world examples of each design
Customer Service Tip - W505
This publication discusses the causes of fungal decay in wood structural panels and how proper design, construction and maintenance can prevent fungal decay.
Market Analysis Reports - MKO-E191
Annual analysis of U.S., Canadian, and global economic factors impacting engineered wood demand, with multi-segment forecasts and historical production data. Available as PDF.
Case Studies - Z110
This case study discusses how a Sprouts grocery store used engineered wood instead of steel for the roof system to solve supply chain challenges and reduce their carbon footprint.
Data File - Y250
This publication discusses diaphragm perimeter nailing and transfer of shear wall forces from the walls above into the foundation/wall framing.
Technical Topic - TT-123
This publication clarifies the applicability of the D+L deflection limits specified in Table 1604.3 of the 2018 IBC, specifically as they pertain to engineered wood products.
Technical Note - K830
This publication discusses the types of termites found in the U.S. and proven construction techniques and treatment methods to protect wood-frames buildings from termite damage.
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).
APA Product Reports - PR-L337
CLT:
Technical Topic - TT-126
Publication answers common questions about fire-protective coatings. Certification and inspection of products with fire-protective coatings are generally outside the scope of APA.
Builder Tip - N335
This publication provides step-by-step instructions for roof sheathing installation
Case Studies - N110
This case study discusses how two mid-rise projects used all-wood podiums instead of concrete to cut construction costs, reduce building mass and improve sustainability.
APA Product Reports - PR-L292
SCL:
APA Product Reports - PR-L283
SCL:
APA Product Reports - PR-L307
SCL:
APA Product Reports - PR-L312
SCL:
Technical Guides - Q230
This guide provides basic instructions for using the APA Wall Bracing Calculator
APA Product Reports - PR-L340
I-Joists:
APA Product Reports - PR-L340C
I-Joists: