Technical Document Library

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.

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.

Advanced Framing House in Limerick, Pennsylvania

Advanced Framing Boosts Energy Performance Case Studies - T110 This case study explains how a Pennsylvania home builder gained a competitive advantage by adopting advanced framing techniques that deliver lasting energy savings to customers.

All-wood Podiums in Mid-Rise Construction at Oceano Luxury Apartment Complex in Woodland Hills, California

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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 Laboratory Testing Capabilities B707 Technical Guides - B707 Learn the APA research facility capabilities, including assembly-level testing of roof and floor building components and performance evaluation of lateral force resisting systems

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

APA Simple Solutions: LVL Beams & Headers Technical Guides - S700 This publication discusses the benefits of using laminated veneer lumber (LVL) beams and headers for window and door framing applications

Apparent and True (shear-free) E Technical Topic - TT-104 This publication explains the difference between apparent modulus of elasticity (MOE) and shear-free MOE in glulam beams

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.

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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

APA-Generic-Content-Card-Technical-Topic

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.

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

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

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: 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

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)

Birney Elementary School in Tacoma, Washington

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Photo Courtesy of Tacoma Public Schools

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.

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.

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.

Sprouts Supermarket in Norwalk, California

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.

Luna Vista Community Multi-Family Building in Mountain View, California

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

ESR Joint Evaluation Report - ESR-1040 Boise Cascade Wood Products, LLC SCL:
VERSA-LAM® Laminated Veneer Lumber

ESR Joint Evaluation Report - ESR-1053 West Fraser Timber Co. Ltd. SCL:
1.7E, 1.55E, 1.35E  Durastrand® Laminated Strand Lumber (LSL), 1.5E, 1.3E, 0.8E Durastrand® Oriented Strand Lumber (OSL)

ESR Joint Evaluation Report - ESR-1210 Roseburg Forest Products Company Rim Board, SCL:
RigidLam® Laminated Veneer Lumber (LVL) and RigidRim® LVL Rim Board

ESR Joint Evaluation Report - ESR-1618 West Fraser LVL SCL:
West Fraser™ LVL Laminated Veneer Lumber

ESR Joint Evaluation Report - ESR-2725 Tolko Industries Ltd. SCL:
T-TEC® LSL, T-TEC® ZB Treated LSL, and T-TEC® LVL

ESR Joint Evaluation Report - ESR-2909 PWT Rim Board, SCL:
PWT™ Laminated Veneer Lumber (LVL), PWT™ Treated LVL and PWT™ Rim Boards

ESR Joint Evaluation Report - ESR-2913 Murphy Company SCL:
Murphy Laminated Veneer Lumber (LVL)

ESR Joint Evaluation Report - ESR-4759 Freres Lumber Co., Inc. SCL:
Freres Single Ply Laminated Veneer Lumber

ESR Joint Evaluation Report - ESR-4760 Freres Lumber Co., Inc. SCL, CLT:
Freres Mass Ply Panel (MPP) and Mass Ply Lams (MPL) beams and columns

ESR Joint Evaluation Report - ESR-5157 Boise Cascade Wood Products, LLC CLT, SCL:
Boise Cascade Veneer Laminated Timber

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.

Fire Resistance of Structural Composite Lumber Technical Topic - TT-118 This publication provides a summary of structural composite lumber (SCL) fire performance based on model building codes and research literature.

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

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.

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.

Case Study: Going for Bold: Window into Affordability - Las Ventanas Multi-Family Development in Long Beach, California (X170)

This modern, affordable housing complex in Long Beach, CA, Las Ventanas, was developed in answer to the "Everyone Home Long Beach" initiative encouraging innovative, low-income housing solutions for the community. Issued April 2021.
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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.

Green Verification Report - GR-L233 PWT SCL, Rim Board:
PWT™ Laminated Veneer Lumber and Rim Board

Green Verification Report - GR-L289 Roseburg Forest Products Company Rim Board, SCL:
RigidLam® LVL, RigidRim® LVL Rim Board

Green Verification Report - GR-L329 PWT SCL:
PWT™ Preservative-Treated Laminated Veneer Lumber

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

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.

Laminated Veneer Lumber Dimension Adjustment Factors for Compliance with NIST Handbook 130 Technical Topic - TT-131 This publication provides procedures for adjusting dimensional measurements of laminated veneer lumber (LVL) in compliance with NIST Handbooks 130 and 133.

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

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