Technical Document Library

Engineered Wood Construction Guide Technical Guides - E30 This publication provides a comprehensive overview of engineered wood construction systems for residential, commercial and industrial buildings Engineered Wood Construction Guide: Roof Construction 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 Engineered Wood Construction Guide: Floor Construction 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 Engineered Wood Construction Guide: Wall Construction 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. Engineered Wood Construction Guide: Panel Selection and Specification 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 Engineered Wood Construction Guide: Glulam Selection and Specification 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) Engineered Wood Construction Guide: I-Joist Selection and Specification Excerpt - E30X-IJ This publication is an excerpt from the APA Engineered Wood Construction Guide, providing a description and specification recommendations for I-joist Engineered Wood Construction Guide: Rim Board Selection and Specification Excerpt - E30X-RB This publication is an excerpt from the APA Engineered Wood Construction Guide, providing guidance on selecting and specifying rim board Engineered Wood Construction Guide: Structural Composite Lumber (SCL) Selection and Specification 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) Engineered Wood Construction Guide: Cross-Laminated Timber (CLT) Selection and Specification 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 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. Engineered Wood Construction Guide: Additional Fire and Building Systems Excerpt - E30X-AFBS Summary of special systems, including fire resistant construction, fire protected assemblies, wind-resistive roofs, energy conservation and panels over metal framing A Guide to the 2015 IRC Wood Wall Bracing Provisions Technical Guides - A Guide to the 2015 IRC Wood Wall Bracing Provisions Performance Rated I-Joists Design and Construction Guide Construction Guide - Z725 This publication discusses span ratings, installation details, cantilever designs, architectural specifications and engineering design properties for APA Performance Rated I-Joists Engineered Wood Wall Systems (Canada) 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 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 Engineered Wood Floor Systems (Canada) 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 Roof Construction (Canada) Construction Guide - R305 This publication provides specification recommendations for plywood and OSB roof systems and installation recommendations for panel roofs Holes in Blocking Used in Engineered Wood Construction 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 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. Engineered Wood Products Help Navigate Design Challenges and Tariffs for North Carolina Senior Living Project 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. Glulam Product Guide Product Guide - X440 This product guide provides an overview of APA trademarked glulam and discusses design considerations, applications and specification Fire-Rated Systems Design and Construction Guide Technical Guides - W305 This publication is a guide to cost-effective fire-rated wood and wood structural panel systems that meet code requirements 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. Diaphragms and Shear Walls Design and Construction Guide Technical Guides - L350 This publication provides design and construction recommendations for engineered diaphragm systems in floor, shear wall and roof systems Glulam in Residential Building Construction Guide 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. Product Guide: Sanded Plywood Product Guide - K435 This publication describes the specification, advantages, applications and finishing recommendations of sanded plywood and includes trademark examples and explanations 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. Advanced Framing Construction Guide - M400 This publication explains the components of advanced framing in floor and wall framing, including illustrated construction details Engineered Wood Handbook & Grade Glossary Technical Guides - X505 This publication provides a list of engineered wood products and common construction terminology explained in easy-to-understand language. 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 Fire Protective Options for I-Joist Floor Systems 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 Product Guide: Performance Rated Siding Product Guide - E300 Describes the following for performance rated siding: face grades, textures and patterns; finishing; ordering/specifying; basic application recommendations Nail-Base Sheathing for Siding and Trim Attachment Construction Guide 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) Wood Structural Panels Over Metal Framing Technical Guides - T625 This publication provides design and fastening recommendations for installation of wood structural panels over metal framing in floors, walls and roofs. 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 Product Guide: HDO/MDO Plywood Product Guide - B360 Describes high density overlay (HDO) and medium density overlay (MDO) plywood applications, properties and characteristics, and shop practice and finishing recommendations Formaldehyde and Engineered Wood Products 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. FAQs: Questions About Wood Structural Panel Exposure to Excessive Moisture FAQ - X501 This publication provides guidance about the serviceability of wood structural panels (plywood and OSB) after exposure to high levels of moisture. Unevenness of Edges in Wood Structural Panels and Thin Underlayment Customer Service Tip - C501 This publication discusses the causes of fungal decay in wood structural panels and how proper design, construction and maintenance can prevent fungal decay. Engineered Wood Gets an Easy A Case Studies - W170 This case study discusses two Washington school districts that creatively leveraged the benefits of exposed wood products in newly constructed schools. 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 Mulching Engineered Wood Products: An Alternative to Landfills Technical Topic - TT-098 This publication discusses the benefits of mulching construction-related wood scraps, including glued engineered wood products Glulam Connection Details Construction Guide - T300 This publication shows correct connections and common connection errors involving glued laminated (glulam) timbers 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 Decay of Engineered Wood Products 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. Engineered Wood Sprouts Solutions for Supermarket Chain 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. 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. Termite Protection for Wood-Framed Construction 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. Deflection Limits in the 2018 IBC for Engineered Wood Products 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. 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 Shear Transfer at Engineered Wood Floors Data File - Y250 This publication discusses diaphragm perimeter nailing and transfer of shear wall forces from the walls above into the foundation/wall framing. APA Product Reports - PR-L337 Freres Lumber Co., Inc. CLT:
Freres Industrial MPP Matting 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. APA Product Reports - PR-L292 Murphy Company SCL:
Murphy T1 and T2 Laminated Veneer Lumber Tension Lams APA Product Reports - PR-L283 Murphy Company SCL:
Murphy Laminated Veneer Lumber APA Product Reports - PR-L307 Murphy Company SCL:
Murphy ConBeam LVL APA Product Reports - PR-L312 Murphy Company SCL:
2350Fb-2.0E Murphy LVL Scaffold Planks ESR Joint Evaluation Report - ESR-1405 Multiple Companies Interfor, IB EWP Inc., Nordic Structures, Resolute Engineered Wood, Roseburg Forest Products Company, Stark Truss Company, Inc.

I-Joists:
Performance Rated I-Joists APA Product Reports - PR-L340 Resolute Engineered Wood I-Joists:
Resolute RSI I-Joists APA Product Reports - PR-L340C Resolute Engineered Wood I-Joists:
Resolute RSI I-Joists APA Product Reports - PR-N217 Plywood, OSB:
Performance Standards and Qualification Policy for Wood Structural Panels and Performance Standard for 303 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 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. Wood Structural Panel Heavy Timber Roof Construction, 2-Dimensional Detail Typical Details - DT-FR-24 This detail shows a heavy timber roof assembly with wood structural panels, featuring heavy timber or glulam beams supporting tongue-and-groove wood decking with built-up roofing. 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. Holes in Structural Glued Laminated Timber (Glulam) Rim Board in Light-Frame Wood Construction Technical Topic - TT-135 Provides recommendations for hole size and segment length for glulam rim board for situations where holes are not specified in the construction documents or shop drawings. 2021 Supplement to: A Guide to the 2018 IRC Wood Wall Bracing Provisions Technical Guides - APA Product Reports - PR-L341 Resolute Engineered Wood I-Joists:
Resolute RSI I-Joists APA Product Reports - PR-L341C Resolute Engineered Wood I-Joists:
Resolute RSI I-Joists Heavy Timber Construction Typical Details - DT-EWG-21 This detail shows a heavy timber roof construction assembly using APA Rated Sturd-I-Floor T&G panels over structural glulam or solid timber beams with built-up roofing. Water Vapor Permeance of Wood Structural Panels and Wood Wall Construction Technical Note - J450 This publication addresses the water vapor permeance of wood structural panels and vapor retarders and their role in wall-system design 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. Suggested Blocking Details for Starter Joists of Engineered Wood Rim Board® Technical Topic - TT-078 This publication provides suggested I-joist blocking details, which may be used when local codes require prescriptive blocking in the space adjacent to starter joists or rim board. Construction Practices for Wood I-Joist Floor Vibration Retrofit Data File - D720 This publication identifies the causes of and remedies for excessive floor vibration. Research Report 154: Wood Structural Panel Shear Walls Research Report - Q260 This report includes test results of unblocked, stapled and metal-framed shear walls, and a summary of previous shear wall tests. 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 Typical Connections to Engineered Flat Roof Members Typical Details - DT-EWG-35 This detail shows four connection methods for flat roof systems: to wood I-joists, open-web parallel-chord wood trusses, steel bar joists with wood nailer and glulam beams. APA Wall Bracing Calculator Quick Start Guide Technical Guides - Q230 This guide provides basic instructions for using the APA Wall Bracing Calculator Performance Rated Panels Product Guide - F405 This product guide describes performance standards, applications, trademark and performance category information for APA Performance Rated Panels Oriented Strand Board Product Guide - W410 This product guide provides an overview of oriented strand board (OSB) and discusses OSB composition, properties, code acceptances and applications Owner's Guide to Understanding Checks in Glued Laminated Timber Technical Guides - F450 This publication addresses common concerns related to checking in glulam and explains how to evaluate if the check effects the glulam’s strength Method CS-PF - Continuously Sheathed Portal Frame Panel Construction Typical Details - DT-WB-4 This detail shows the wall bracing method continuously sheathed portal frame and its requirements including anchorage, minimum member sizes, and sheathing attachment. Minimizing Buckling of Wood Structural Panels Technical Note - D481 Provides design and construction practices that reduce the potential for buckling of wood structural panel sheathing caused by wood expansion due to increased moisture conditions. Wood Structural Panel Overlap Typical Details - DT-AF-18 This detail shows proper wood structural panel sheathing overlap connections for two raised-heel truss configurations. Structural Insulated Panels Product Guide - H650 This publication covers SIP advantages, applications, design and construction considerations, connection details, assembly and related topics. Glulam Appearance Classifications for Construction Applications Technical Note - Y110 This publication clarifies the distinction between appearance considerations and structural properties of glulam timbers and appearance classifications of glulam members. Wood Structural Panel Box Header Nail Pattern Typical Details - DT-AF-17 This detail shows the nail pattern for a wood structural panel box header at wall openings with continuous top and bottom plates. One-Sided Wood Structural Panel Box Header Typical Details - DT-AF-8 This detail shows a one-sided box header built using wood structural panels on the exterior face of the wall to eliminate conventional headers and increase cavity insulation space. Two-Sided Wood Structural Panel Box Header Typical Details - DT-AF-9 This detail shows a two-sided box header built using wood structural panels on both sides of the wall in lieu of conventional headers to increase cavity insulation space. 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. Temporary Construction Loads Over I-Joist Roofs and Floors Technical Note - J735 Provides recommendations for properly placing heavy loads in a partially completed light-framed structure to prevent damage to the structure and/or injury to the work crew APA Product Reports - PR-L269 Western Forest Products Glulam, Rim Board:
WFP GL 3000 Glulam and WFP Rim Wood Structural Panel Identification Technical Topic - TT-013 This publication answers commonly asked questions about identification marks found on wood structural panels 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. 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. 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 IECC Compliance Options for Wood-Frame Wall Assemblies Technical Guides - P320 Joint ICC and APA publication describes how energy performance is measured in exterior wall assemblies and how to improve wall thermal performance to meet energy code requirements Installation of Stucco Exterior Finish Over Wood Structural Panel Wall Sheathing Data File - Q370 This publication describes recommended wall construction methods for the installation of stucco exterior finish over structural wood panel wall sheathing Wood Structural Panels Used as Nailable Sheathing Technical Topic - TT-109 This publication discusses how wood structural panels can withstand earthquake, wind, wind suction and pressure loads while permitting the anchorage of lightweight siding materials Buckling of Wood-Based Panel Siding Technical Note - F410 This publication describes mechanism and construction features that contribute to siding buckling Window Opening Detail—Wood Siding Typical Details - DT-BB-18 This detail shows window head and sill flashing with siding. Wood Moisture Content and the Importance of Drying in Wood Building Systems Technical Topic - TT-111 This publication provides guidance on how to avoid potential moisture problems when using wood structural products with impermeable materials Wood Structural Panel Sizes Technical Topic - TT-114 This publication provides APA’s position on wood structural panel sizes concerning panel size listings in ICC-ES ESR-2586. 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 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). Voluntary Product Standard PS 2-18, Performance Standard for Wood Structural Panels Standards - S350 Performance requirements, adhesive bond performance, panel construction and workmanship, dimensions and tolerances, marking and moisture content of wood structural panels. Wood I-Joists and APA Performance Rated Rim Boards Technical Topic - TT-022 This publication discusses the structural superiority of using APA Performance Rated Rim Boards with prefabricated wood I-joists rather than sawn lumber rim boards. 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 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. 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 Recommendations for Snow and Ice on Wood Structural Panels Technical Topic - TT-119 This publication describes APA recommended guidelines for snow and ice accumulation on wood structural panels 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 Prevent Callbacks in Wood Flooring Installation Technical Note - T350 This publication discusses how to minimize the risk of future wood flooring problems when moisture at the jobsite is an issue Flame Spread Index of APA Performance-Rated Wood Structural Panels Technical Topic - TT-010 This publication summarizes surface burning characteristics (flame spread and smoke development) of wood structural panels tested in accordance with ASTM E84 APA Product Reports - PR-L345 Alamco Wood Products, LLC Glulam:
Alamco Structural Glued Laminated Timber Destruction of Insects During Manufacture of Wood Structural Panels and Structural Composite Lumber Technical Topic - TT-014 This publication describes various wood structural panel manufacturing processes that result in the eradication of insects Load-Span Tables for APA Wood Structural Panels 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 Moisture Exposure Recommendations for Wood Structural Panels Technical Topic - TT-002 This publication provides recommended bond classification appropriate for end use in-service moisture conditions. Wood Structural Panel Sheathing on Hip Roofs Technical Topic - TT-083 This publication provides installation guidelines for hip-roof panel applications on trusses spaced 24 in. o.c. that address serviceability issues and improve performance APA Product Reports - PR-L352 D.R. Johnson Wood Innovations Glulam:
DRJ Structural Glued Laminated Timber ESR Joint Evaluation Report - ESR-1040 Boise Cascade Wood Products, LLC SCL:
VERSA-LAM® Laminated Veneer Lumber ESR Joint Evaluation Report - ESR-5157 Boise Cascade Wood Products, LLC CLT, SCL:
Boise Cascade Veneer Laminated Timber APA Product Reports - PR-L313 Boise Cascade Wood Products, LLC Glulam:
KING BEAM® 3000 and BOISE GLULAM® APA Product Reports - PR-L335 Boise Cascade Wood Products, LLC SCL:
Boise Cascade VersaWorks® Veneer Laminated Timber APA Product Reports - PR-L335C Boise Cascade Wood Products, LLC CLT:
Boise Cascade® Veneer Laminated Timber APA Product Reports - PR-N136 Georgia-Pacific Wood Products LLC OSB:
Georgia-Pacific ForceField® Weather-Resistive Barrier OSB APA Product Reports - PR-S201 Boise Cascade Wood Products, LLC SCL, I-Joists, Rim Board:
BCI® and AJS® I-Joists, and Versa-Lam® Rim Boards (Fire-Rated Assemblies) APA Product Reports - PR-S202 Georgia-Pacific Wood Products LLC Rim Board:
FiberStrong®, GP, and APA Rim Board Lightweight or Gypsum Concrete Topping, 15/32" APA Wood Structural Panel Subfloor, 3-Dimensional Detail Typical Details - DT-FR-5 This detail shows three-dimensional floor assembly of APA wood structural panel subflooring with gypsum concrete topping over joists and Type X gypsum wallboard ceiling below. Performance Standards and Qualification Policy for Wood Structural Panels Standards - E445 This publication describes requirements and test methods for APA Performance Rated Panels (APA Rated Sturd-I-Floor®, APA Rated Sheathing and APA Rated Siding). 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. I-Joist Fire Assembly with Mineral Wool Typical Details - DT-FPF-7 This detail shows an I-joist floor assembly with mineral wool insulation for fire protection per IRC Section R503. Special Consideration for Designing Radiant Heat Systems Over Wood I-Joist Floors Technical Topic - TT-113 This publication addresses how to prevent adverse effects on wood I-joist floor framing from improperly designed, installed or operated underfloor heat systems 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 Wind Resistance of Wood Structural Panel Sheathed Walls Technical Topic - TT-110 This publication discusses wind resistance of light-framed walls sheathed with plywood or OSB using the methodology of the 2012 IBC Table 2304.6.1 and the 2012 IRC Table R602.3(3) Wood Structural Panel Shear Wall Deflection Formula Technical Topic - TT-053 This publication discusses components of shear-wall deflection and includes formulas for calculating deflection of shear walls Single-Layer Floor Systems with I-Joists or Trusses: Minimum 23/32" Tongue & Groove APA Sturd-I-Floor, 0.019" Galvanized Steel Resilient Channels Maximum 16" o.c., 1x4 Wood Setting Strips, 3-Dimensional Detail Typical Details - DT-FR-19 This detail shows a single-layer floor assembly using 23/32 T&G APA Sturd-I-floor over wood I-joists with resilient channels, insulation, and gypsum wallboard ceiling finish. Wood Structural Panels for California Division of State Architect Projects Technical Topic - TT-106 This publication discusses California regulations interchangeable that treat plywood and oriented strand board (OSB) as interchangeable Residential Garage Door Installation Details with Prefabricated Wood I-Joists Technical Topic - TT-130 This publication provides a method for garage door installation with back-hangs that are attached to the bottom flange of residential I-joists with lag screws. Effect of Green Lumber Framing on Wood Structural Panel Shear Wall Performance Technical Topic - TT-075 This publication discusses a test program conducted by APA to investigate the effect of constructing shear walls with green framing lumber APA Product Reports - PR-N135 Georgia-Pacific Wood Products LLC OSB:
Georgia-Pacific DryMax® Industrial Panel Panel Design Specification 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. 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. Performance-Rated I-Joist Roof Framing Details Technical Guides - D710 This publication includes recommended construction details for I-joists in roof applications. Introduction to Lateral Design Technical Guides - X305 This publication explains how to design wood-frame buildings to withstand the lateral loads typical of high wind and seismic zones. Raised-Heel Trusses for Efficient, Cost-Effective, Comfortable Homes 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 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 Rim Boards Technical Guides - W345 This publication details connection requirements and application notes for APA Performance Rated Rim Board 4 Best Practices for Glulam Installation Technical Guides - Q705 This publication provides simple steps to proper installation that ensures glulam beams perform as designed. Panel Edge Support for Narrow-Width Roof Sheathing Technical Note - R275 This publication provides recommendations from APA research on the performance of 24-inch and narrower roof sheathing panels The Importance of Code-Compliant Concrete Formwork Technical Guides - A236 This publication describes the importance of adhering to PS 1 plywood specifications to meet the material performance criteria outlined in ACI 318 & ACI 347, as mandated by the IBC 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 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 Plywood Design Specification Technical Guides - Y510 This publication includes section properties, recommended design stresses and design methods for plywood manufactured under Voluntary Product Standard PS 1 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 Fastener Loads for Plywood - Screws Technical Note - E830 This publication summarizes APA test data on ultimate withdrawal and ultimate lateral loads for plywood joints fastened with wood screws and sheet metal screws. Research Report 138: Plywood Diaphragms Research Report - E315 This publication describes tests of high-load diaphragms with multiple rows of fasteners, glued diaphragms, and diaphragms with openings Floor Squeaks: Causes, Solutions and Prevention Technical Note - C468 This publication discusses typical floor squeak causes and provides corrections and preventative measures. 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. Glued Laminated Beam Design Tables Technical Guides - S475 This publication provides recommended design load tables for glulam beam roof and floor applications The Performance Path to Energy Code Compliance Technical Guides - R505 This publication explains how to use a performance path to meet International Energy Conservation Code (IECC) requirements while balancing cost and structural requirements. Field Notching and Drilling of Glued Laminated Timber Beams Technical Note - S560 This publication provides guidance for notching and drilling on glulam when the end notching and drilling of horizontal though-thickness holes cannot be avoided 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). Effect of Large Diameter Horizontal Holes on the Bending and Shear Properties of Structural Glued Laminated Timber (Glulam) Technical Note - V700 This publication is a supplement to APA S560, providing an analytical tool in situations when horizontal holes exceeding the prescriptive guidance in APA S560 are necessary Introduction to Wall Bracing Technical Guides - F430 This publication explains IRC-compliant wall bracing, explains why bracing is important and shows how to meet basic requirements for wall bracing in accordance with the code Plywood Design Specification, Supplement 2-23: Design and Fabrication of Glued Plywood-Lumber Beams Technical Guides - S812 This publication presents the recommended method for the design and fabrication of glued plywood and lumber beams. Plywood Design Specification, Supplement 5-23: Design and Fabrication of All-Plywood Beams Technical Guides - H815 This publication presents the recommended methods for the design and fabrication of staple-glued all-plywood beams. Data File: APA Rim Board in Fire Rated Assemblies 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: Selection, Installation and Preparation of Plywood Underlayment Data File - L335 This publication provides recommendations for the installation and preparation of underlayment under finish flooring in residential and light commercial applications Effect of Large Diameter Horizontal Holes on the Bending and Shear Properties of Laminated Veneer Lumber (LVL) Technical Note - V900 This publication supplements APA Form G535, providing an analytical tool in situations when horizontal holes in LVL exceeding the prescriptive guidance in APA G535 are necessary FAQs: Questions About Structural Plywood and OSB Performance FAQ - F505 This publication answers questions about structural plywood and OSB panel performance, grade, growth and natural characteristics. Field Notching and Drilling of Laminated Veneer Lumber Technical Note - G535 This publication provides guidance for notching and drilling on LVL when the end notching and drilling of horizontal through-thickness holes cannot be avoided. Noise-Rated Systems Technical Guides - W460 This publication is a guide to noise-rated wood-frame construction systems, including STC and IIC ratings for tested wall and floor assemblies for effective sound control. One North Office Buildings Case Studies - S120 This publication discusses how glulam framing and engineered wood helped Portland’s One North development achieve energy efficiency and sustainability. 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. SIP Eave Detail A Typical Details - DT-SIP-7 This detail outlines the construction of an eave using a SIP, highlighting proper flashing, sealant, and roofing materials. Horizontal Beltline Joints Typical Details - DT-EWG-22 This detail shows three horizontal beltline joint configurations for APA panel siding at floor lines in multistory construction. Sustainable Buildings, Sustainable Future Technical Guides - F305 Describes the environmental benefits of engineered wood, compares wood to other structural products and explains scientific research that demonstrates woods green building merits. 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. Preframed Roof Panel 8' x 8' Perpendicular to Supports Typical Details - DT-EWG-32 This detail shows a prefabricated APA wood structural panel roof assembly with purlins installed perpendicular to the supports. R20 Wall—Advanced Framing Techniques Typical Details - DT-CWA-2 R20 advanced framing wall assembly at 24" o.c. minimum with insulated corner, engineered wood or lumber header, R19 compressed fiberglass batts & wood structural panel sheathing. R20 Wall—Insulated Siding Typical Details - DT-CWA-4 This detail shows R20 wall assembly with insulated siding (R2 min.), engineered wood or lumber header, wood structural panel sheathing, and R19 compressed fiberglass batts. Engineering Solutions for a More Inclusive Community Case Studies - X175 This publication discusses how a California nonprofit incorporated engineered wood into an affordable housing complex to keep costs low and create an inclusive community 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. Main and Side Members Typical Details - DT-SPR-12 This detail shows fastener connection between main member (last member penetrated) and side member (first member penetrated) in wood construction. 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. 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. FM Class 1-135 Typical Details - DT-EWG-19 This detail shows an FM Class 1-135 rated flat roof assembly using wood structural panels. Single-Layer Floor Systems with I-Joists or Trusses: Minimum 23/32" T&G APA Sturd-I-Floor, 0.019" Galvanized Steel Resilient Channels Maximum 16" o.c., Two Layers 1/2" Type X Gypsum Wallboard Taped, 3-Dimensional Detail Typical Details - DT-FR-20 Single-layer tongue and groove APA-rated sheathing over wood I-joists with resilient channels and two layers of gypsum wallboard ceiling assembly for residential construction. Single-Layer Floor Systems with I-Joists or Trusses: Minimum 23/32" Tongue & Groove APA Sturd-I-Floor Glued and Nailed to I-Joist, 0.019" Galvanized Steel Resilient Channels Maximum 16" o.c., 3-Dimensional Detail Typical Details - DT-FR-15 Single-layer tongue and groove APA-rated sheathing over wood I-joists with resilient channels and two layers of gypsum wallboard ceiling assembly for residential construction. FM Class 1-105 Typical Details - DT-EWG-17 This detail shows an FM Class 1-105 rated flat roof assembly using wood structural panels over open-web trusses. FM Class 1-120 Typical Details - DT-EWG-18 This detail shows an FM Class 1-120 rated flat roof assembly using wood structural panels over steel joists. 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 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. FM Class 1-90 Typical Details - DT-EWG-20 This detail shows an FM Class 1-90 rated flat roof assembly using wood structural panels with foam insulation, fiberboard cover board, and built-up or modified bitumen roofing. One-Hour Combustible Floor-Ceiling And Roof-Ceiling Assemblies - I-Joists Typical Details - DT-EWG-28 This detail shows one-hour fire-resistive floor/ceiling assemblies using wood I-joists with APA Sturd-I-Floor decking and gypsum wallboard ceiling systems with furring channels. One-Hour Fire-Rated Exterior Load-Bearing Wall Assembly Typical Details - DT-EWG-30 One-hour fire-rated exterior wall assembly using APA Rated siding, gypsum sheathing, weather-resistive barrier, and Type X gypsum wallboard over 2x4 wood stud framing. Stucco Over APA Panel Sheathing Typical Details - DT-EWG-34 Stucco cladding assembly applied over APA Rated wood structural panel sheathing with two layers of weather-resistive barrier, self-furring metal lath, and metal bead. Quarterly Production Report Q1-26 Market Analysis Reports - QPRO-26 The APA Quarterly Production Report delivers comprehensive, up-to-date data on North American structural wood panel and engineered wood product markets Quarterly Production Report Q2-26 Market Analysis Reports - QPRO-26 The APA Quarterly Production Report delivers comprehensive, up-to-date data on North American structural wood panel and engineered wood product markets Minimum 1/2" APA Rated Siding Exterior Plywood, 1" Rigid Foam Insulation Sheathing; Exterior Finish-Elastomeric Coating, 1" Rigid Foam Insulation Sheathing, Minimum 1/2" APA Rated Sheathing Exposure 1 Plywood Typical Details - DT-FR-7 Fire-rated wall assembly of two UL-rated configurations (U330 and U335) with different exterior finishes over wood framing with mineral wool or glass fiber insulation. Two-Hour Load-Bearing Interior or Exterior Wall System Typical Details - DT-FR-23 This detail shows two-hour fire-rated load-bearing interior or exterior wall assembly with 2x6 wood studs, mineral wool insulation, and Type X gypsum wallboard on both sides. I-Joist Cantilever Detail for Balconies Typical Details - DT-IJ-6 This detail outlines proper construction methods for cantilevered I-joist floor extensions, such as balconies. Lumber Cantilever Detail for Balconies Typical Details - DT-IJ-7 This detail outlines a construction method for balconies using cantilevered lumber extensions attached to I-joists at their back span. One-Hour Load-Bearing Interior Wall System, 2x4 Studs @ 16" o.c. Typical Details - DT-FR-11 One-hour fire-rated interior partition wall assembly with 2x4 wood studs at 16” o.c., 3-1/2-inch mineral wool insulation, and 5/8-inch Type X gypsum wallboard on both sides. Voluntary Product Standard PS 1-22, Structural Plywood Standards - L870 This publication is the national standard for performance requirements and marking plywood for construction and industrial uses. Open Soffit Typical Details - DT-EWG-31 This detail shows APA Rated sheathing panels installed as an open soffit on exposed roof rafters with weather-protected edges. Shear Wall Hold-Down Anchor Typical Details - DT-EWG-33 This detail shows a hold down anchor assembly connecting a shear wall to a concrete foundation to resist overturning forces. 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 Going for Bold: Window Into Affordability Case Studies - X170 This case study discusses how the Las Ventanas affordable housing project used glulam, LVL, OSB and FTAO design principles to cut costs and streamline construction. Two-Stud Inside Corner for Wall Panelization Typical Details - DT-AF-16 This detail shows a two-stud inside corner framing assembly with a panelized/prefabricated wall system. 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. 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. I-Joist Fire Assembly with Rockwool Safe'n'Sound Typical Details - DT-FPF-6 This detail shows an I-joist floor assembly with Rockwool Safe'n'Sound mineral wool insulation for fire protection per IRC Section R503. 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 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 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. 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. Energy-Conserving Wall Assemblies Typical Details - DT-EWG-16 This detail shows two energy-conserving exterior wall assemblies. Horizontal Wall Joints Typical Details - DT-EWG-23 This detail shows three horizontal joint configurations for APA panel siding — butt and flash, lap, and shiplap — each with blocking flatwise or edgewise at the joint location. Installation of APA Plywood Underlayment Typical Details - DT-EWG-24 This detail shows APA plywood underlayment installation over APA Rated sheathing subfloor. Noise-Resistant Floor Assembly Typical Details - DT-EWG-26 This detail shows noise-resistant floor/ceiling assembly using APA Rated sheathing subfloor, lightweight concrete topping, resilient channels, and gypsum wallboard. Noise-Resistant Party Wall Typical Details - DT-EWG-27 This detail shows a noise-resistant wall assembly in plan view using staggered 2x4 studs on 2x6 plates with APA Rated sheathing and gypsum wallboard to reduce sound transmission. One-Hour Combustible Floor-Ceiling Assemblies - Lumber Joists Typical Details - DT-EWG-29 This detail shows two one-hour fire-rated floor/ceiling assemblies with lumber joists. Typical Panel-To-Metal Framing Systems Typical Details - DT-EWG-36 This detail shows 4 methods for attaching APA panel deck to metal framing systems including nailable steel joists, nailer-anchored, and direct-to-formed steel joist configurations. Vertical Inside and Outside Corner Joints Typical Details - DT-EWG-37 This detail shows vertical corner joint configurations for APA panel and lap siding — butt and caulk, corner board lap joints, and lap siding corners — in horizontal section view. Vertical Wall Joints Typical Details - DT-EWG-38 This detail shows four vertical joint configurations for APA panel siding butt, shiplap, reverse board and batten, T1-11 and channel groove, and vertical batten. R20 Wall—Insulated Headers Typical Details - DT-CWA-3 This detail shows R20 wall assembly at 24" o.c. with insulated header (R13.8), insulated corner, R21 cavity insulation, and wood structural panel sheathing with wood/vinyl siding. One-Hour Load-Bearing Interior Wall System, 2x6 Studs @ 16" o.c. Typical Details - DT-FR-12 This detail shows a one-hour fire-rated interior wall assembly with 2x6 studs at 16 inches on center, mineral wool insulation, and gypsum wallboard on both sides. 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. Insulated Three-Stud Corner (California Corner) Typical Details - DT-AF-2 This detail shows an insulated three-stud outside corner (California corner) framing assembly. Insulated Three-Stud Corner (Inside Corner) Typical Details - DT-AF-3 This detail shows an insulated three-stud inside corner framing assembly. Intersecting Wall Connection Typical Details - DT-AF-4 This detail shows connections of intersecting single 2x top plates with steel plates and alternate lumber splice connections. Ladder Junction Typical Details - DT-AF-5 This detail shows an advanced framed wall junction with single top plates and 2x ladder blocking spaced vertically at 24” O.C. for an interior wall to exterior wall connection. Large Opening Single Headers Typical Details - DT-AF-6 This detail shows the use of a single header with a width less than the wall to create more space for insulation. Longitudinal Top Plate Splice Typical Details - DT-AF-7 Opening in Non-Load-Bearing Walls Typical Details - DT-AF-10 This detail shows framing for an opening in a non-load-bearing wall using a single opening top plate, cripple studs, and jack studs without conventional headers. Permitted Framing Alignment Offsets - Single Top Plates Typical Details - DT-AF-11 This detail shows permitted framing alignment for trusses, floor joists, rafters, and ceiling joists above (or below) studs when using a single top plate. Single-Ply Header Typical Details - DT-AF-12 This detail shows an isometric view of a single-ply load-bearing header assembly at a wall opening with cavity insulation space and code-compliant king and jack stud configuration. Two-Stud Corner - Ladder Blocking Typical Details - DT-AF-13 This detail shows an isometric view of a two-stud corner framing assembly with 2x ladder blocking spaced vertically at 24 inches on center to provide interior drywall backing. Two-Stud Corner – Outside Corner View Typical Details - DT-AF-14 This detail shows a plan view of a two-stud corner framing assembly with 2x ladder blocking spaced vertically at 24 inches on center to provide interior drywall backing. Two-Stud Corner with Drywall Clips Typical Details - DT-AF-15 This detail shows a two-stud outside corner framing assembly using drywall clips to secure interior drywall without requiring a third corner stud. Nailer Anchored with Power Driven Fasteners Typical Details - DT-WOM-1 This detail shows wood nailer attachment to steel wide flange beam using drive pins to support APA panel deck, secured with power driven fasteners. Exterior Deck Water-Resistive System Typical Details - DT-BB-3 This detail shows exterior deck ledger connection to wood I-joist floor system of water-resistant flashing. Method ABW – Alternate Braced Wall Typical Details - DT-WB-2 This detail shows the alternate braced wall bracing method and its requirements including sheathing fastening, framing requirements, and foundation anchorage. Method PFG – Intermittent Portal Frame at Garage Door Openings in SDC A, B and C Typical Details - DT-WB-7 This detail shows the wall bracing method portal frame at a garage and its requirements including sheathing attachment, minimum member sizes, and anchorage. Method PFH – Intermittent Portal Frame with Hold Down Typical Details - DT-WB-9 This detail shows the wall bracing method portal frame with hold down and its requirements including minimum framing sizes, sheathing attachment, hold-downs, and anchorage. 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. 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. Garage Door Header to End Wall, Steel Tie Plate Typical Details - DT-GH-2 This detail shows a connection of a garage door header and an end wall using a steel plate fastened to a solid wood post, glulam column or studs. Rain-Screen Wall Details Typical Details - DT-BB-4 This detail shows rain-screen wall assembly of furring strips creating a drainage airspace over water-resistive barrier and wood structural panel sheathing. 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. Foam SIP Ridge Cap Detail Typical Details - DT-SIP-2 This detail shows roof SIPs sloped up to form a ridge and connections of the SIPs to framing members with panel screws, while also showing tape, sealant, and roofing materials. Hanging Floor for SIPs Typical Details - DT-SIP-3 This detail shows how to attach a floor system in between the top and bottom of two SIP walls by hanging the joists at the top of a SIP with top mount hangers and a cap plate. Rim Board for SIPs Typical Details - DT-SIP-4 This detail shows installation of a floor system between the top and bottom of two SIP walls with the joists directly on top of the SIP with a cap plate and rim board end closure. SIP Block Spline Typical Details - DT-SIP-5 This detail shows a wall-to-wall vertical SIP connection using a block spline and specifies nail size, nail spacing, use of sealant, and an 1/8” expansion gap. SIP Dimensional Lumber Spline Typical Details - DT-SIP-6 This detail shows a wall-to-wall vertical SIP connection using a dimensional lumber spline and specifies nail size, nail spacing, use of sealant, and an 1/8” expansion gap. SIP Foundation Detail C Typical Details - DT-SIP-8 This detail shows a SIP wall assembly being attached to a floor system bearing on a concrete/CMU foundation wall, highlighting proper assembly of wall, floor, and foundation. I-Joist Fire Assembly with Gypsum Board at Bottom Flange Typical Details - DT-FPF-1 This detail shows 1/2" gypsum board or 5/8" wood structural panel installed at the bottom flange of an I-joist floor assembly for fire protection per IRC Section R702.3. 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. 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. Eye Rod Hanger Typical Details - DT-SPR-9 This detail shows eye rod hanger for supporting steel sprinkler pipes from wood framing using filler blocks and sheet metal screws or nails per NFPA 13 requirements. NFPA 13 Steel Angle Trapeze with Hanger Typical Details - DT-SPR-13 This detail shows steel angle trapeze hanger system for supporting CPVC or steel sprinkler pipes from wood joists per NFPA 13 requirements with two installation options. One-Hour Load-Bearing Exterior Wall System, 2x6 Studs @ 16" o.c. Typical Details - DT-FR-10 This detail shows a one-hour fire-rated load bearing exterior wall assembly using 2x6 wood studs at 16 inches on center with Type X gypsum wallboard on both sides. R20 Wall—2x4 Framing Typical Details - DT-CWA-1 This detail shows R20 2x4 wall assembly at 16" o.c. with insulated header, insulated siding (R3 min.), insulated corner, R15 cavity insulation, and wood structural panel sheathing. R21 Wall—Advanced Framing Techniques Typical Details - DT-CWA-5 This detail shows R21 advanced framing wall assembly with insulated header and corner, wood structural panel sheathing, and fiberglass batt insulation at 16" or 24" o.c. spacing. Single-Layer Floor Systems with I-Joists or Trusses: Minimum 23/32" Tongue & Groove APA Sturd-I-Floor, 0.019" Galvanized Steel Hat-Shaped Furring Channels Maximum 24" o.c., 3-Dimensional Detail Typical Details - DT-FR-18 Single-layer tongue and groove APA-rated sheathing floor system with wood I-joists, hat-shaped furring channels, gypsum wallboard ceiling, and mineral fiber insulation. Single-Layer Floor Systems with I-Joists or Trusses: Minimum 23/32" Tongue & Groove APA Sturd-I-Floor, Two Layers 1/2" Type X Gypsum Wallboard Taped, 3-Dimensional Detail Typical Details - DT-FR-21 This detail shows single-layer wood I-joist floor system with 23/32" T&G APA rated sheathing and two layers of 1/2" gypsum wallboard ceiling providing a fire-rated assembly. Stucco (Over Self-Furring Metal Lath), APA Rated Sheathing Exposure 1 Plywood or OSB Typical Details - DT-FR-22 This detail shows a fire-rated wall assembly of stucco over self-furring metal lath with APA rated sheathing, optional insulation, gypsum wallboard, and wood studs. Wind Rated Roofs: UL Class 90 (NMS519) Typical Details - DT-WRR-1 This detail shows UL Class 90 rated roof assembly with two-ply asphalt glass fiber mat hot-mopped over plywood sheathing on wood framing with rayon tape. Wind Rated Roofs: UL Class 90 (NMS520) Typical Details - DT-WRR-2 This detail shows wood roof assembly with plywood decking over purlins/trusses with two-ply asphalt glass fiber mat roofing system, rated UL Class 90 Single-Layer Floor Systems with I-Joists or Trusses: Minimum 23/32" T&G APA Sturd-I-Floor Glued and Nailed to I-Joist, 0.026" Galvanized Steel Hat-shaped Furring Channels, Maximum 16" o.c., 3-Dimensional Detail Typical Details - DT-FR-16 This detail shows a single-layer 23/32" T&G APA Sturd-I-Floor assembly over wood I-joists with hat-shaped furring channels, mineral fiber batts, and Type C gypsum wallboard ceiling Fire-Retardant-Treated (FRT) Plywood Technical Note - K320 Discusses fire-retardant-treated plywood specifications, code-compliant applications, testing standards and structural requirements for commercial and residential construction. 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. Materials Handling Technical Guides - M200 This publication discusses the use of APA-trademarked wood structural panels in materials handling applications including pallets, crates, bins, shelving and mezzanine floors. Moisture-Related Dimensional Stability Technical Topic - TT-028 This publication discusses linear expansion and thickness swell in wood structural panels due to moisture Designing Diaphragms Over Existing Board Floors or Roofs 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. Preservative Treatment for Structural Glued Laminated Timber Technical Topic - TT-092 This publication describes revisions of the 2016 American Wood Protection Association (AWPA) U1 standard that are related to structural glued laminated timber (glulam) Containers and Bins Technical Guides - X235 This publication discusses designing, building and specifying wood structural panel containers and bins for industrial materials handling applications. Santa Barbara Apartments Case Studies - S125 This case study discusses how glulam beams and wood structural panel shear walls were used to construct a California apartment complex on budget. Wall to Foundation Flashing at Brick Ledge Typical Details - DT-BB-9 This detail shows wall-to-foundation connection at brick veneer of base flashing. Backer Block Typical Details - DT-IJ-1 This detail outlines backer block installation for single and double I-joist headers. 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 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. Force Transfer Around Openings Shear Walls Typical Details - DT-FTO-1 This detail shows the layout of a force transfer around opening shear wall. I-Joists Bearing on Floor Beam Typical Details - DT-GB-12 This detail shows I-joists bearing on a glulam floor beam with face nail connections and blocking not shown for clarity. Joists Mounted Flush with Floor Beam Typical Details - DT-GB-13 This detail shows two floor joist flush connections options: one face mounted hanger and one top mounted hanger. Lumber Joists Bearing on Floor Beams Typical Details - DT-GB-14 This detail shows a cross-section of sawn lumber floor joists secured by toe nails supported by a glulam beam. Sill Flashing at Sliding Glass Door Typical Details - DT-BB-6 This detail shows sill flashing detail at sliding glass door of pan flashing counter-flashing deck flashing and water-resistive barrier. Wall Penetration with Flashing Typical Details - DT-BB-8 This detail shows two-piece flashing installation at wall penetration. Mass Timber Has Banks Seeing Green Case Studies - V135 This case study discusses how CLT and glulam helped First United Bank achieve construction and energy efficiencies. FAQs About Oriented Strand Board Technical Topic - TT-133 This publication discusses buckling, fastener recommendations, surface flaking, thickness swell, linear expansion and moisture management of OSB wood structural panels 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 Double-Sheathed Shear Walls 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. Texas Tornado Damage Assessment Report Damage Assessment Report - SP-1177 This publication contains damage assessments from the December 2015 tornado storm near Dallas, TX, including wind-resistant construction recommendations Effect of Overdriven Fasteners On Shear Capacity Technical Topic - TT-012 This publication provides suggested guidelines for determining if overdriven fasteners will affect the shear capacity of diaphragm or shear wall construction Santa Maria Water Reservoir Cover Case Studies - C115 This case study discusses how a glulam roof structure provided decay resistance, seismic performance and cost savings for a municipal water reservoir in California. Energy-Heel Truss Attachment to Sheathing Typical Details - DT-RH-1 This detail shows raised heel energy truss attachment to an exterior wall for additional attic insulation space. I-Joist Fire Assembly with 0.5 inch Gypsum Board Above Flange Typical Details - DT-FPF-4 This detail shows an I-joist floor assembly with 1/2" gypsum board placed above the bottom flange for fire protection per IRC Section R503. I-Joist Fire Assembly with 5/8" inch Gypsum Board Above Flange Typical Details - DT-FPF-5 This detail shows an I-joist floor assembly with 5/8" gypsum board placed above the bottom flange for fire protection per IRC Section R503. I-Joist Fire Assembly with Gypsum Board Typical Details - DT-FPF-2 This detail shows 1/2" gypsum board fastened to the bottom flange of an I-joist floor assembly for fire protection per IRC Section R702.3.1. I-Joist Fire Assembly with Gypsum Board at Web Holes Typical Details - DT-FPF-3 This detail shows 1/2" gypsum board installed at I-joist web holes for fire protection, shown in two configurations per IRC Section R702.3.1. Multiple Small-Diameter Holes for Electrical Cables Technical Topic - TT-132 Recommendations for cutting holes in I-joists, LVL and glulam for electrical cables in compliance with the National Electric Code (NEC) and International Residential Code (IRC) Panels Attached Directly to Formed Steel Joist Typical Details - DT-WOM-2 This cross-section detail shows APA panel deck attachment to metal C or box section joist using hardened screwshank nails or self-tapping fasteners with optional adhesive. Panels Nailed to Nailable Steel Joists Typical Details - DT-WOM-3 This connection detail shows APA panel deck attachment to nailable steel joists using hardened screwshank nails and 2x4 nailer blocking at panel edges. Wall to Foundation Flashing—Stucco Typical Details - DT-BB-10 This detail shows wall-to-foundation flashing detail at stucco-clad wall. Wall to Roof Flashing—Brick Veneer Typical Details - DT-BB-11 This detail shows wall-to-roof flashing detail at brick veneer roof intersection. Wall to Roof Flashing—Stucco Typical Details - DT-BB-12 This detail shows wall-to-roof flashing detail at stucco-clad wall. Simple Air Sealing with OSB and Plywood Sheathing Technical Guides - T210 This publication details 10 common sources of air infiltration that should be checked and sealed during construction Frequently Asked Questions About Portal Frames Technical Topic - TT-080 This publication answers FAQs about portal frame construction from the APA 2018 IRC wall bracing webinar series Monthly Housing Report Annual Subscription Market Analysis Reports - MHRS-26 Monthly U.S. & Canadian housing market analysis covering starts, permits, home sales, mortgage rates, remodeling, and wood product demand indicators. Annual subscription. 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. 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. 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. 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. Concrete Masonry Crawl Space Foundation Typical Details - DT-BB-1 This detail shows concrete masonry crawl space foundation. 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. 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 - 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. End and Edge Distances, Loaded and Unloaded Typical Details - DT-SPR-8 This detail shows proper bolt spacing requirements including loaded edge distance, unloaded edge distance, end distance, and spacing between rows of bolts. Framing Anchor to Backer Block Typical Details - DT-IJ-3 This detail shows installation of backer and filler blocks for a double I-joist header supporting a stair stringer that is attached with a framing anchor. Garage Door Header to End Wall, King Stud Nailed to Beam Typical Details - DT-GH-1 This detail shows a connection of a garage door header at and end wall where a glulam beam is connected to a king stud with nails. Glulam or Multi-Structural Composite Lumber Beams Typical Details - DT-IJ-4 This detail shows I-Joists with top mount hangers supported by a multi-ply structural composite lumber (SCL) beam. This detail is similar for a glulam beam with face mount hangers. I-Joist Blocking Panel Typical Details - DT-IJ-5 This detail shows the installation of PRI blocking panels between I-joists, attached to top plate with face nails for shear transfer at floor sheathing boundaries. Load Carried by Flanges Typical Details - DT-SPR-11 Installation detail for supporting steel sprinkler pipes from structural framing using hanger blocks with fastening specifications for different pipe sizes and loads. Load-Bearing Interior (Chase) Wall System Typical Details - DT-FR-6 Fire-rated load bearing interior chase wall assembly with gypsum wallboard, plywood sheathing, insulation cavity, and 1-inch space between stud walls at 16- or 24-inch centers. Minimum 3/8" APA Rated Siding Exterior Plywood Typical Details - DT-FR-8 This detail shows fire-rated wall assembly detail of 3/8" APA rated plywood siding over Type X gypsum wallboard with optional insulation on 2x4 studs at 16" on center. Offset Eye-Socket Hanger Typical Details - DT-SPR-14 This detail shows installation of an offset eye-socket hanger supporting a 4-inch steel sprinkler pipe with filler block bearing and fastening requirements. One-Hour Fire-Rated Glulam Beam (Layup for Simple Span) Typical Details - DT-FR-9 This detail shows cross-section of a one-hour fire-rated glulam beam layup configuration with compression lams at top, core lams in center, and tension lams at bottom. PRI Blocking Typical Details - DT-IJ-8 This detail shows PRI blocking installation. It outlines where blocking is required, how to attach blocking and floor joists to a double top plate, and vertical load capacities. PRI Rim Joist Typical Details - DT-IJ-9 This detail outlines the attachment of PRI (Performance Rated I-joist) rim to floor joists and a double top plate. It also includes bearing and vertical load transfer requirements. Rim Board Typical Details - DT-IJ-10 This detail shows the installation of APA rim board to floor joists and a double top plate, specifically noting vertical capacity and shear transfer nailing. Roof Ridge Detail—Pan and Cover Tile Typical Details - DT-BB-5 This detail shows pan and cover tile roof ridge detail of APA rated sheathing. Sheathing Reinforcement for Cantilevered I-Joist for Vertical Building Offset One Side Typical Details - DT-IJ-11 This detail shows installation of a sheathing reinforcement on cantilevered I-joists at a vertical building offset and specifies a reinforcement for one side of the I-joist. Sheathing Reinforcement for Cantilevered I-Joist for Vertical Building Offset Two Sides Typical Details - DT-IJ-12 This detail shows installation of a sheathing reinforcement on cantilevered I-joists at a vertical building offset and specifies reinforcement for two sides of the I-joist. Single Double I-Joist Blocking Typical Details - DT-IJ-13 This detail shows installation of single or double I-joists to a top plate along an exterior wall and where backer blocks would be required for siding attachment. Slab-On-Grade Foundation Typical Details - DT-BB-7 This detail shows slab-on-grade foundation detail of moisture control layers. Solid Block Typical Details - DT-IJ-14 This detail shows solid vertical blocking in a floor cavity, next to an I-joist, to properly transfer load from above to bearing below. Squash Block Typical Details - DT-IJ-15 This detail shows squash blocks at an I-joist with a 1/16" height difference for proper vertical load transfer around the joist. Strap Connection at Force Transfer Around Openings Shear Walls Typical Details - DT-FTO-2 This detail shows the blocking requirement for the metal strap at the exterior or interior of a force transfer around the opening shear wall. Sway Brace Blocking for Seismic Loads Parallel to the Joist Typical Details - DT-SPR-15 This detail shows two installation options for seismic sway brace blocking attached parallel to I-joist webs with blocking on one or both sides. Sway Brace Blocking for Seismic Loads Perpendicular to the Joist 1 Typical Details - DT-SPR-16 This detail illustrates a seismic sway brace blocking configuration, showing the installation of perpendicular diagonal bracing for I-joist floor systems. Sway Brace Blocking for Seismic Loads Perpendicular to the Joist 2 Typical Details - DT-SPR-17 This detail shows seismic bracing web blocking and cross member installation for I-joists to resist loads perpendicular to joist direction. Top-Mounted Hanger to 2x Plate Typical Details - DT-IJ-16 This detail shows I-joists with top mount hangers supported by a wide flange steel beam or wall with a 2x plate (or nailer) flush with the I-joists. UL Class 90 (NM519) Typical Details - DT-WWR-1 This detail shows a UL Class 90 rated roof assembly using two-ply asphalt glass fiber mat over plywood deck with Douglas-fir or Southern pine framing. UL Class 90 (NM520) Typical Details - DT-WWR-2 This detail shows a wind-resistive roof assembly with hot-mopped built-up roofing over APA-rated plywood sheathing and structural framing, rated U.L. Class 90. Water Table Slope Typical Details - DT-BB-13 This detail shows how the natural water table rises at the center of a building and how foundation perimeter drains lower the water table to drain to daylight on sloped sites. Window Flashing with Building Paper Typical Details - DT-BB-14 This detail shows six-step sequential window installation when using building paper. Window Flashing with Water-Resistive Barrier Typical Details - DT-BB-15 This detail shows six-step sequential window installation detail of proper order of water-resistive barrier.