Technical Document Library
Research-Backed Guidance for Every Project
Research-Backed Guidance for Every Project
Technical Guides -
Data File - B840
This publication provides minimum requirements that plywood panels must meet to qualify for classification as APA 303 Series specialty siding.
Technical Guides - Q705
This publication provides simple steps to proper installation that ensures glulam beams perform as designed.
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.
Technical Guides -
A Guide to the 2015 IRC Wood Wall Bracing Provisions
Technical Guides -
A Guide to the 2018 IRC Wood Wall Bracing Provisions + Free Digital 2021 Supplement
Technical Topic - TT-100
This publication describes the use of portal-frame design in engineered applications and as bracing in conventional light-frame construction
Technical Note - T230
This publication describes single- and double-layer all-wood floor assemblies for acoustic performance and includes both construction details and acoustic ratings
Construction Guide - M400
This publication explains the components of advanced framing in floor and wall framing, including illustrated construction details
Technical Topic - TT-107
This publication answers questions regarding the performance of wood structural panels as air barriers
Technical Guides - X400
This publication explains the APA panel trademark and quality standards for wood structural panels
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 Guides - V691
Discusses specifications and design details for the APA panel-deck block pallet, including load capacity, nailing schedules and materials handling system compatibility.
Builder Tip - Z735
This publication includes important tips for storage, handling and jobsite use of APA Performance Rated I-Joists.
Technical Note - R280
This publication provides specification and installation recommendations for panel subfloors to be used under hardwood flooring
Technical Guides - W345 CA
This publication describes connection requirements and application notes for APA Performance Rated Rim Board for Canadian Limit States Design
Technical Guides - W345
This publication details connection requirements and application notes for APA Performance Rated Rim Board
Technical Topic - TT-060
Provides a recommendation for foam plastic roof insulation over minimum Performance Category 15/32 engineered wood panels that meet the 15-minute thermal barrier requirement
Specification Guide - SP-1103
This publication provides an overview of the APA trademark and includes a sample specification for APA Rated Sheathing.
Technical Note - C465
This publication provides installation recommendations and test results for energy-saving APA Sturd-I-Wall construction
Specification Guide - SP-1102
This publication provides an overview of the APA trademark and includes a sample specification for APA Rated Sturd-I-Floor (OSB).
Specification Guide - SP-1102
This publication provides an overview of the APA trademark and includes a sample specification for APA Rated Sturd-I-Floor (Plywood).
Technical Guides - S700
This publication discusses the benefits of using laminated veneer lumber (LVL) beams and headers for window and door framing applications
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).
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
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 - Q230
This guide provides basic instructions for using the APA Wall Bracing Calculator
Technical Topic - TT-007
This publication recommends three methods for the installation of a wood floor system over a concrete slab: sleepers, rigid foam or direct.
Technical Topic - TT-104
This publication explains the difference between apparent modulus of elasticity (MOE) and shear-free MOE in glulam beams
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.
Technical Topic - TT-125
This publication provides guidance on construction of balconies with solid-sawn dimension lumber attached to I-joist floor systems in supplement to Figure 4 of APA form Z725
Technical Note - F410
This publication describes mechanism and construction features that contribute to siding buckling
Build A Better Home - A525
This publication outlines the characteristics of mold and mildew, the effect they can have on a structure and its inhabitants, and provides methods for prohibiting their growth.
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.
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 - A530
This publication describes the primary sources of moisture intrusion in wood wall construction and recommends methods to prevent moisture penetration.
Technical Guides - J440
This publication provides five basic steps to construct energy-saving wood wall systems that meet code, are durable to the forces of nature and help homeowners save money.
Builder Tip - S300
This publication describes how to reduce nail pops through recommended fastener selection and installation
Builder Tip - F435
This publication highlights essential details for using the APA narrow wall bracing method around garage openings.
Builder Tip - Q300
This publication describes how to prevent floor complaints and callbacks with proper floor sheathing installation
Builder Tip - K310
Describes installation techniques for plywood and OSB roof sheathing and roof ventilation techniques that will help minimize the potential for buckling of asphalt shingles
Builder Tip - F455
This publication describes best practices for storage and installation of glued laminated timber (glulam).
Builder Tip - M300
This publication contains spacing recommendations for APA Rated Sheathing, APA Rated Sturd-I-Floor® and APA Rated Siding.
Builder Tip - R340
This publication provides an overview of selection, handling, installation and fastening of APA plywood underlayment.
Builder Tip - R540
This publication provides recommendations for storage and handling of glulam beams.
Technical Guides - M310
This publication illustrates nine construction details that improve wind resilience in residential construction, with real-world examples of each design
Technical Topic - TT-025
This publication discusses fire test results comparing the burn-through resistance of oriented strand board (OSB) and plywood.
Technical Note - Y245
This publication describes the natural fire resistance of glulam beams and columns and provides fire endurance calculation methods
Technical Topic - TT-091
Details the layups for APA 303 grooved plywood sidings (T1-11 and reverse board & batten), representing minimal plywood siding constructions as typically found in the marketplace.
Technical Guides - Q701
This publication is designed for use by mills as an aid in manufacturing and grading Canadian Standards Association (CSA) plywood panels.
Technical Note - X227
This publication discusses recommended maximum caster loadings for various wheel types and sizes on bare plywood, Plyron and overlaid plywood surfaces.
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
Technical Guides - V345
This publication contains grade information, form maintenance recommendations, design information and case studies related to plywood concrete forming
Technical Note - X485
This publication explains causes of condensation, identifies areas prone to condensation issues, and provides options to control condensation
Builder Tip - M300 LA
Recomendaciones de espacio entre paneles de clasificación “APA Rated Sheathing,” los pisos de clase Sturd-I-Floor® de APA y los paneles de clasificación “APA Rated Siding."
Builder Tip - S300 LA
Esta publicación describe cómo reducir los clavos sobresalientes con la selección e instalación recomendada de elementos de fijación.
Data File - D720
This publication identifies the causes of and remedies for excessive floor vibration.
Builder Tip - Q300 LA
Esta publicación describe cómo prevenir quejas y arreglos del sistema de piso con una instalación correcta del tablero estructural.
Technical Guides - X235
This publication discusses designing, building and specifying wood structural panel containers and bins for industrial materials handling applications.
Technical Note - R495
This publication discusses decay fungi and how to prevent/minimize degradation of wood through proper design, storage, construction and maintenance
Technical Guides - S500
This publication describes the stringent product standards required for cross-laminated timber manufactured in North America, which may not be met by imported products
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
Data File - L335
This publication provides recommendations for the installation and preparation of underlayment under finish flooring in residential and light commercial applications
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.
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 - T555
This technical note presents a rational analysis for applying FTAO to walls with asymmetric piers and walls with multiple openings, based on APA modeling and testing
Data File - Y240
This publication provides information on member sizes and layup, design stresses, column design equations and design tables and examples.
Technical Topic - TT-097
This publication explains the design considerations for installing a wood structural panel diaphragm over existing board sheathing (decking) in floors or roofs.
Technical Topic - TT-014
This publication describes various wood structural panel manufacturing processes that result in the eradication of insects
Technical Guides - L350
This publication provides design and construction recommendations for engineered diaphragm systems in floor, shear wall and roof systems
Technical Topic - TT-115
This technical topic presents the results and discussion of full-scale testing of double-sheathed shear walls with both layers of wood structural panels on a single side.