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: 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: 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: 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 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. 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 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 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 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 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 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. 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 Glulam Product Guide Product Guide - X440 This product guide provides an overview of APA trademarked glulam and discusses design considerations, applications and specification 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). 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 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. 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 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 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 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 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 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 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. 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) 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 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 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 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. 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. 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-N217 Plywood, OSB:
Performance Standards and Qualification Policy for Wood Structural Panels and Performance Standard for 303 Siding 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. 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. 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. 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. 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. 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. 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. 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 Product Reports - PR-L337 Freres Lumber Co., Inc. CLT:
Freres Industrial MPP Matting 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. Proper Installation of APA Rated Sheathing for Roof Applications Builder Tip - N335 This publication provides step-by-step instructions for roof sheathing installation 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 APA Wall Bracing Calculator Quick Start Guide Technical Guides - Q230 This guide provides basic instructions for using the APA Wall Bracing Calculator 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 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 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. 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. 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. 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. 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 2021 Supplement to: A Guide to the 2018 IRC Wood Wall Bracing Provisions Technical Guides - 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 Builder Tips: APA Portal Frame Bracing Method Framing Tips Builder Tip - F435 This publication highlights essential details for using the APA narrow wall bracing method around garage openings. APA 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 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 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 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). 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. 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 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. 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 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. 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 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. Performance Rated Panels Product Guide - F405 This product guide describes performance standards, applications, trademark and performance category information for APA Performance Rated Panels 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 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. 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 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. 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. 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 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. 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. 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 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. 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. 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 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. Structural Insulated Panels Product Guide - H650 This publication covers SIP advantages, applications, design and construction considerations, connection details, assembly and related topics. 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. 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 Performance-Rated Rim Boards Technical Guides - W345 This publication details connection requirements and application notes for APA Performance Rated Rim Board 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. 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. 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.