Technical Document Library

19/32" T&G APA Plywood Underlayment, 15/32" APA Wood Structural Panel Subfloor, 3-Dimensional Detail Typical Details - DT-FR-1 This detail shows floor assembly of APA wood structural panel subfloor over plywood underlayment, building paper, and joists with gypsum wallboard ceiling below.

Advanced Framing House in Limerick, Pennsylvania

2021 Supplement to: A Guide to the 2018 IRC Wood Wall Bracing Provisions Technical Guides -

2026 Structural Panel & Engineered Wood Yearbook 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.

2125 Franklin Building in Eugene, Oregon

2125 Franklin Student Housing Case Studies - S115 This case study explains how glulam beams and engineered wood products shaped 2125 Franklin, a 735-bedroom mixed-use student housing building near the University of Oregon.

303 Siding Manufacturing Specifications Data File - B840 This publication provides minimum requirements that plywood panels must meet to qualify for classification as APA 303 Series specialty siding.

A Guide To Engineered Wood Products 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.

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A Guide to the 2015 IRC Wood Wall Bracing Provisions Technical Guides - A Guide to the 2015 IRC Wood Wall Bracing Provisions

A Guide to the 2018 IRC Wood Wall Bracing Provisions + Free Digital 2021 Supplement Technical Guides - A Guide to the 2018 IRC Wood Wall Bracing Provisions + Free Digital 2021 Supplement

A Portal Frame With Hold Downs for Engineered Applications Technical Topic - TT-100 This publication describes the use of portal-frame design in engineered applications and as bracing in conventional light-frame construction

Timberlab's Sunnydale Community Center Site

Acoustic Performance of All-Wood Floor Systems 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

Advanced Framing Construction Guide - M400 This publication explains the components of advanced framing in floor and wall framing, including illustrated construction details

APA-Generic-Content-Card-Technical-Topic

Air Permeability of Wood Structural Panels as Air Barriers Technical Topic - TT-107 This publication answers questions regarding the performance of wood structural panels as air barriers

Alternate Insulated Three-Stud Corner (with Drywall Clips) Typical Details - DT-AF-1 This detail shows an alternative insulated 3-stud corner framing assembly with drywall clips to support the gypsum from one stud.

ANSI/APA PRP 210-2024: Standard for Performance-Rated Engineered Wood Siding 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.

2024 Multi products OSB and plywood panels

APA - The Mark of Quality for Wood Structural Panels Technical Guides - X400 This publication explains the APA panel trademark and quality standards for wood structural panels

APA Glued Floor System Typical Details - DT-EWG-1 This detail shows an APA glued floor system using APA Rated Sturd-I-Floor or sheathing panels.

APA Laboratory Testing Capabilities B707 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

APA Panel Roof Sheathing Typical Details - DT-EWG-2 This detail shows APA Rated sheathing panels installed as roof decking over rafters or trusses with panel clips, asphalt or wood shingles, and proper edge and joint spacing.

APA Panel Stair Treads and Risers Typical Details - DT-EWG-3 This detail shows APA panel stair treads and risers installed on stringers in two configurations, using plywood, OSB, or composite panels with 8d common nail fastening.

APA Panel Subflooring Typical Details - DT-EWG-4 APA Rated sheathing panels installed as subflooring over 2x joists, I-joists, or floor trusses with tongue-and-groove or blocked edges on a wood-framed floor system.

APA Panel Wall Sheathing Typical Details - DT-EWG-5 This detail shows APA Rated wall sheathing applied in two orientations- strength axis across or parallel to studs- with weather-resistive barrier and siding on a wood-framed wall.

APA Panel-Deck Block Pallet Design and Specifications 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.

APA Performance Rated Panel Subfloors Under Hardwood Flooring Technical Note - R280 This publication provides specification and installation recommendations for panel subfloors to be used under hardwood flooring

APA Performance-Rated Rim Board - Canadian Limit States Design Technical Guides - W345 CA This publication describes connection requirements and application notes for APA Performance Rated Rim Board for Canadian Limit States Design

APA Performance-Rated Wood Structural Panels as Thermal Barriers for Foam Plastics 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

APA Rated Lap Siding Over Wood Structural Panel Sheathing Typical Details - DT-EWG-6 This detail shows APA Rated lap siding installed over wood structural panel sheathing with a weather-resistive barrier on a wood-framed exterior wall assembly.

APA Rated Panel Siding Over Wood Structural Panel Sheathing Typical Details - DT-EWG-7 This detail shows APA Rated siding panels applied over wood structural panel sheathing with a weather-resistive barrier on a wood-framed wall assembly.

APA Rated Sheathing Specification Guide - SP-1103 This publication provides an overview of the APA trademark and includes a sample specification for APA Rated Sheathing.

APA Rated Siding Exterior or Other Exterior Finish (Code-Recognized Type), 5/8" Type X Gypsum Sheathing, Minimum 15/32" APA Rated Sheathing Exposure 1 OSB or Plywood Typical Details - DT-FR-2 This detail shows a fire-rated wall assembly using wood structural panel sheathing over studs with gypsum wallboard, fire protective membrane, and glass fiber insulation.

APA Rated Siding Exterior or Other Exterior Finish (Code-Recognized Type), 5/8" Type X Gypsum Sheathing, Minimum 7/16" APA Rated Sheathing Exposure 1 OSB or Plywood Typical Details - DT-FR-3 This detail shows fire-rated exterior wall assembly with APA rated siding over sheathing, insulation, 2x4 wood framing at 16" on center and Type X gypsum wallboard interior finish.

APA Rated Siding Exterior, 5/8" Type X Gypsum Sheathing Typical Details - DT-FR-4 This detail shows a one-hour fire-rated wood-framed wall assembly with Type X gypsum sheathing and wallboard, optional insulation, and APA rated siding exterior finish.

**Please note this image may have been edited or manipulated to enhance visual quality**

APA Rated Siding Panels Over Rigid Foam Insulation Sheathing Technical Note - C465 This publication provides installation recommendations and test results for energy-saving APA Sturd-I-Wall construction

APA Rated Sturd-I-Floor (Plywood) 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).

APA Rated Sturd-I-Floor 16, 20, and 24 o.c. Typical Details - DT-EWG-8 This detail shows APA Rated Sturd-I-Floor panel installation at 16", 20", or 24" o.c. joist spacing with tongue-and-groove edges over a floor framing system.

APA Rated Sturd-I-Floor 32 and 48 o.c. Typical Details - DT-EWG-9 This detail shows APA Rated Sturd-I-Floor panel installation at 32" or 48" o.c. joist spacing with tongue-and-groove joints over a crawl space floor framing system.

APA Rated Sturd-I-Floor 48 o.c. Typical Details - DT-EWG-10 This detail shows APA Rated Sturd-I-Floor 48 o.c. panels installed over a post-and-beam floor framing system with 4x4 posts, 4x girders, and tongue-and-groove panel edges.

APA Sturd-I-Wall (Horizontal Panel Siding Installation) Typical Details - DT-EWG-12 This detail shows APA Rated horizontal panel siding applied directly to wall framing in an APA Sturd-I-Wall system.

APA Sturd-I-Wall (Vertical Panel Installation) Typical Details - DT-EWG-13 This detail shows APA Rated vertical panel siding applied directly to wall framing in an APA Sturd-I-Wall system with weather-resistive barrier.

APA System Report 101: Design for Combined Shear and Uplift from Wind 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

APA System Report 102: APA Simplified Wall Bracing Method 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 System Report 103: Use of Wood Structural Panels for Energy-Heel Trusses 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

APA Wall Bracing Calculator Quick Start Guide Technical Guides - Q230 This guide provides basic instructions for using the APA Wall Bracing Calculator

APA Wood Structural Panels Over Concrete Slabs 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.

Applicability of APA Trademarks on Engineered Wood Products Surface-Coated with Fire Protective Coatings 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.

Audrain Museum Building in Newport, Rhode Island

*MUST CREDIT*
Photo Courtesy of Ben Jacobson

Audrain Museum Case Studies - Q125 This case study explains how glulam beams were used to replace the flooring system of the historic Audrian Building, enabling the building to support multi-ton vintage automobiles.

Beauty and the Budget Case Studies - V130 This publication describes how LEVER Architecture used engineered wood to balance design, budget and sustainability goals in a Portland, OR, commercial building project.

Beveled SIP Wall Typical Details - DT-SIP-1 This detail shows a SIP wall beveled to support a sloped SIP roof that are connected together with panel screws and nails. It also shows sealant, roofing material and cladding.

Brick Counter Flashing Details Typical Details - DT-BB-2 This detail shows chimney counter flashing detail of base flashing over shingle underlayment and roof deck, with counter flashing embedded in brick mortar joint.

Brick Veneer Over APA Panel Sheathing Typical Details - DT-EWG-14 This detail shows brick veneer or masonry cladding installed over APA Rated wood structural panel sheathing.

Buckling of Wood-Based Panel Siding Technical Note - F410 This publication describes mechanism and construction features that contribute to siding buckling

Build A Better Home: Moisture-Resistant Foundation Construction 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 Energy Efficient Walls 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 Tips: 4 Ways to Minimize Nail Pops Builder Tip - S300 This publication describes how to reduce nail pops through recommended fastener selection and installation

Builder Tips: APA Portal Frame Bracing Method Framing Tips Builder Tip - F435 This publication highlights essential details for using the APA narrow wall bracing method around garage openings.

APA Case Study: Raising Up Raised Wood Floors - Murray House in St. Augustine, Florida

Builder Tips: Construct a Solid, Squeak-Free Floor System Builder Tip - Q300 This publication describes how to prevent floor complaints and callbacks with proper floor sheathing installation

**Please note this image contains an errors or issue with the construction of the building or item. This image should only be used for Educational purposes.**

Builder Tips: How to Minimize Buckling of Asphalt Shingles 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 Tips: Prevent Buckling with Proper Spacing Builder Tip - M300 This publication contains spacing recommendations for APA Rated Sheathing, APA Rated Sturd-I-Floor® and APA Rated Siding.

Builder Tips: Proper Selection and Installation of APA Plywood Underlayment Builder Tip - R340 This publication provides an overview of selection, handling, installation and fastening of APA plywood underlayment.

Building for High-Wind Resilience in Light-Frame Wood Construction Technical Guides - M310 This publication illustrates nine construction details that improve wind resilience in residential construction, with real-world examples of each design

Burn-Through Resistance of OSB Panels Technical Topic - TT-025 This publication discusses fire test results comparing the burn-through resistance of oriented strand board (OSB) and plywood.

California Wildland Urban Interface Approvals for APA Siding 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.

Canadian Plywood Grading Guide Technical Guides - Q701 This publication is designed for use by mills as an aid in manufacturing and grading Canadian Standards Association (CSA) plywood panels.

Caster Loadings on Plywood Technical Note - X227 This publication discusses recommended maximum caster loadings for various wheel types and sizes on bare plywood, Plyron and overlaid plywood surfaces.

Ceramic Tile Over Wood Structural Panel Floors 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

Closed Soffit Typical Details - DT-EWG-15 This detail shows a closed soffit assembly using APA rated roof sheathing and exterior panels for the closed soffit with continuous screened or louvered venting.

Concrete Forming Design/Construction Guide Technical Guides - V345 This publication contains grade information, form maintenance recommendations, design information and case studies related to plywood concrete forming

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Condensation, Causes and Control Technical Note - X485 This publication explains causes of condensation, identifies areas prone to condensation issues, and provides options to control condensation

Consejos Para Los Constructores: Evite el Pandeo con un Espaciado Adecuado 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."

Consejos Para Los Constructores: Minimice los Clavos Sobresalientes Builder Tip - S300 LA Esta publicación describe cómo reducir los clavos sobresalientes con la selección e instalación recomendada de elementos de fijación.

Raising Up Raised Wood Floors - Murray House in St. Augustine, Florida

Construction Practices for Wood I-Joist Floor Vibration Retrofit Data File - D720 This publication identifies the causes of and remedies for excessive floor vibration.

Construction on an Apartment using FTAO in Rialto, California

Construir un Sistema de Piso Sólido, Libre de Chirridos Builder Tip - Q300 LA Esta publicación describe cómo prevenir quejas y arreglos del sistema de piso con una instalación correcta del tablero estructural.

Containers and Bins Technical Guides - X235 This publication discusses designing, building and specifying wood structural panel containers and bins for industrial materials handling applications.

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