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. 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 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. 4 Best Practices for Glulam Installation Technical Guides - Q705 This publication provides simple steps to proper installation that ensures glulam beams perform as designed. 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. 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 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 Advanced Framing Boosts Energy Performance Case Studies - T110 This case study explains how a Pennsylvania home builder gained a competitive advantage by adopting advanced framing techniques that deliver lasting energy savings to customers. 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 All-Wood Podiums in Mid-Rise Construction 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. 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. Angle Bracket Hanger Typical Details - DT-SPR-1 This detail shows angle bracket hanger assembly for supporting steel sprinkler pipe from wood structural members using blocking and optional fastening methods. ANSI 117-2025: Standard Specification for Structural Glued Laminated Timber of Softwood Species Standards - ANSI 117-2025 This ANSI Standard provides information for the design of structural glued laminated timber (glulam), reference values for glulam design and specific layup requirements. ANSI 405-2023: Standard for Adhesives for Use in Structural Glued Laminated Timber Standards - ANSI 405-2023 This ANSI standard provides minimum requirements to evaluate adhesives for use in structural glued laminated timber. This document is a revision of ANSI 405-2018. ANSI A190.1-2022 Product Standard for Structural Glued Laminated Timber Standards - ANSI A190.1-2022 This ANSI Standard contains requirements for the manufacture and quality control of structural glued laminated timber. ANSI/APA PRG 320-2025 Standard for Performance-Rated Cross-Laminated Timber 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). 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. ANSI/APA PRR 410-2021: Standard for Performance-Rated Engineered Wood Rim Boards Standards - ANSI/APA PRR 410 This standard provides requirements and test methods for qualification and quality assurance for performance rated engineered wood rim board. ANSI/APA PRS 610.1: Standard for Performance-Rated Structural Insulated Panels in Wall Applications 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 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 I-Joists Storage, Handling & Safety Recommendations Builder Tip - Z735 This publication includes important tips for storage, handling and jobsite use of APA Performance Rated I-Joists. 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 Rim Boards Technical Guides - W345 This publication details connection requirements and application notes for APA Performance Rated Rim Board 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 PRI-400 Performance Standard for Residential I-Joists Standards - PRI-400 This standard contains performance criteria, qualification requirements and quality assurance information for APA Performance Rated I-joists used in residential floors. APA PRI-400 Performance Standard for Residential I-Joists, Limit States Design for Canada Standards - PRI-400 CA This standard details performance criteria, qualification requirements and quality assurance for APA Performance Rated residential I-joists, limit states design, for use in Canada APA PRI-405 Performance Standard for Commercial I-Joists Standards - PRI-405 This standard contains performance criteria, qualification requirements & quality assurance information for APA Performance Rated I-joists in commercial roof/floor construction. APA PRR-401: Performance Standard for APA Rim Boards Standards - PRR-401 This APA Standard provides dimension and tolerances, performance requirements, test methods and qualification policy for APA Performance Rated Rim Board. 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. 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 (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 (OSB). 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 Simple Solutions: LVL Beams & Headers Technical Guides - S700 This publication discusses the benefits of using laminated veneer lumber (LVL) beams and headers for window and door framing applications 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 System Report 405: Fire Protection of Floors Constructed with Prefabricated Wood I-Joists for Compliance with the International Residential Code 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 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. Apparent and True (shear-free) E Technical Topic - TT-104 This publication explains the difference between apparent modulus of elasticity (MOE) and shear-free MOE in glulam beams Appleton Mills Case Studies - R145 This case study discusses how glulam beams, planks, girders and columns were used to structurally and aesthetically restore the historic Appleton Mills complex in Lowell, MA. 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 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. Backer Block Typical Details - DT-IJ-1 This detail outlines backer block installation for single and double I-joist headers. Balcony Design for I-Joist Floor with Lumber Cantilever 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 Beam at End Wall Bearing, Nailed Typical Details - DT-GB-1 This detail shows glulam beam bearing at an end wall. The beam is supported by trimmer studs and secured to the king stud with 16d nails. Beam at End Wall with Floor Joist Flush with Beam Typical Details - DT-GB-2 This detail shows a glulam beam connection to an end wall with flush floor joists or I-joists connected to the beam. Beam at End Wall with Floor Joist Over Beam Typical Details - DT-GB-3 This detail shows a glulam beam connection to an end wall with I-joists bearing on the beam. Beams Butting Over Wood Support Typical Details - DT-GB-6 This detail shows two glulam beams butting over a wood support, with the beams connected to the support using a steel post cap and through-bolts. Bearing at End Wall, Steel Post Cap Typical Details - DT-GB-8 This detail shows connection of glulam beam bearing on solid-sawn post or glulam column using steel post cap at end wall condition. Bearing at End Wall, Steel Tie Plate Typical Details - DT-GB-9 This detail shows a steel tie plate connection for a glulam beam bearing on a wood support at an end condition. 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. Brelsford WSU Visitor Center Case Studies - R130 This case study discusses the Brelsford WSU visitor center’s use of several engineered wood products, including CLT and glulam. 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: Controlling Mold and Mildew 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: 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 a Better Home: Moisture-Resistant Roof Construction 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: Moisture-Resistant Wall Construction 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. 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. 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 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: Keep Glulam Looking Its Best with Proper Storage and Handling Builder Tip - F455 This publication describes best practices for storage and installation of glued laminated timber (glulam). 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. Builder Tips: Proper Storage and Handling of Glulam Beams Builder Tip - R540 This publication provides recommendations for storage and handling of glulam beams. 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. Calculating Fire Resistance of Glulam Beams and Columns Technical Note - Y245 This publication describes the natural fire resistance of glulam beams and columns and provides fire endurance calculation methods 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. Cantilever Detail for Vertical Building Offset with Double I-Joist Typical Details - DT-IJ-2 This detail shows cantilevered double I-joists supporting a vertical building offset and specifies connections to the top plate, blocking panels, and Rim Board or APA WSP closure. 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. Ceiling Flange Hanger Typical Details - DT-SPR-2 This detail shows ceiling flange hanger installation for supporting steel sprinkler system pipes from engineered wood ceiling joists. 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. Coach Screw Hanger Typical Details - DT-SPR-3 This detail shows a coach screw hanger assembly for supporting steel sprinkler pipe from wood framing using filler blocks and sheet metal screws or nails. 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 Concrete Masonry Crawl Space Foundation Typical Details - DT-BB-1 This detail shows concrete masonry crawl space foundation. 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. Construction Practices for Wood I-Joist Floor Vibration Retrofit Data File - D720 This publication identifies the causes of and remedies for excessive floor vibration. 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. Continuous Beam Over Intermediate Steel Column Typical Details - DT-GB-10 This detail shows two options for connecting a continuous glulam floor beam to an intermediate steel column using either a steel post cap or steel cap plate. Continuous Floor Beam Over Wood Support Typical Details - DT-GB-11 This detail shows two connection options for a continuous glulam floor beam bearing on a wood support. Controlling Decay in Wood Construction Technical Note - R495 This publication discusses decay fungi and how to prevent/minimize degradation of wood through proper design, storage, construction and maintenance CPVC Hanger - Double Offset Typical Details - DT-SPR-4 This detail shows double offset CPVC sprinkler pipe hanger assembly using 2x4 blocking with sheet metal screws or nails, supporting 3" maximum diameter pipe per NFPA 13. CPVC Hanger - Face Mount Typical Details - DT-SPR-5 This detail shows two installation options for face-mounting CPVC sprinkler pipe hangers to wood blocking using either sheet metal screws or nail-and-block combinations. CPVC Hanger - Offset Typical Details - DT-SPR-6 This detail shows offset hanger installation for CPVC sprinkler system pipes showing two attachment options using backing nuts or sheet metal screws with lumber blocking. CPVC Hanger in Web Bore Typical Details - DT-SPR-7 This detail shows proper installation of a CPVC sprinkler system pipe hanger through an I-joist web bore, with maximum diameter and load requirements per NFPA 13. Cross-Laminated Timber—North American CLT vs. Imported Product 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