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.

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.

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

APA Panel 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 Performance Rated I-Joists Storage, Handling & Safety Recommendations Builder Tip - Z735 This publication includes important tips for storage, handling and jobsite use of APA Performance Rated I-Joists.

APA Performance-Rated 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 PRI-400 Performance Standard for Residential I-Joists Standards - PRI-400 This standard contains performance criteria, qualification requirements and quality assurance information for APA Performance Rated I-joists used in residential floors.

APA PRI-400 Performance Standard for Residential I-Joists, Limit States Design for Canada Standards - PRI-400 CA This standard details performance criteria, qualification requirements and quality assurance for APA Performance Rated residential I-joists, limit states design, for use in Canada

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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.

Inside I-Joist Floors: Improve Performance with Thicker Sheathing and Deeper I-Joists - Premium-performance floor uses fewer components for faster construction.

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

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.

Backer Block Typical Details - DT-IJ-1 This detail outlines backer block installation for single and double I-joist headers.

Balcony Design for I-Joist Floor with Lumber Cantilever Technical Topic - TT-125 This publication provides guidance on construction of balconies with solid-sawn dimension lumber attached to I-joist floor systems in supplement to Figure 4 of APA form Z725

Builder Tips: 4 Ways to Minimize Nail Pops Builder Tip - S300 This publication describes how to reduce nail pops through recommended fastener selection and installation

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.

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.

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.

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

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

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

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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

CPVC Hanger - Double Offset Typical Details - DT-SPR-4 This detail shows double offset CPVC sprinkler pipe hanger assembly using 2x4 blocking with sheet metal screws or nails, supporting 3" maximum diameter pipe per NFPA 13.

CPVC Hanger - Face Mount Typical Details - DT-SPR-5 This detail shows two installation options for face-mounting CPVC sprinkler pipe hangers to wood blocking using either sheet metal screws or nail-and-block combinations.

CPVC Hanger - Offset Typical Details - DT-SPR-6 This detail shows offset hanger installation for CPVC sprinkler system pipes showing two attachment options using backing nuts or sheet metal screws with lumber blocking.

CPVC Hanger in Web Bore Typical Details - DT-SPR-7 This detail shows proper installation of a CPVC sprinkler system pipe hanger through an I-joist web bore, with maximum diameter and load requirements per NFPA 13.

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

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.

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: 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: 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: 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 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.

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-1144 Boise Cascade Wood Products, LLC I-Joists:
AJS Series Prefabricated Wood I-Joists

ESR Joint Evaluation Report - ESR-1251 Roseburg Forest Products Company I-Joists:
RFPI® Prefabricated Wood I-Joists

ESR Joint Evaluation Report - ESR-1262 Interfor I-Joists:
P3 JOIST PJI-40, PJI-60, PJI-65, PJI-80 and PJI-90 I-Joists

ESR Joint Evaluation Report - ESR-1305 PWT I-Joists:
PWT™ I-Joists

ESR Joint Evaluation Report - ESR-1336 Boise Cascade Wood Products, LLC I-Joists:
BCI Prefabricated Wood I-Joists

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

ESR Joint Evaluation Report - ESR-1742 Nordic Structures I-Joists:
Nordic Joist Prefabricated I-Joists

ESR Joint Evaluation Report - ESR-2919 Stark Truss Company, Inc. I-Joists:
Stark Truss SI-40, SI-60 and SI-80 Series Prefabricated Wood I-Joists

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.

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

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

Construction on an Apartment using FTAO in Rialto, California

Floor Squeaks: Causes, Solutions and Prevention Technical Note - C468 This publication discusses typical floor squeak causes and provides corrections and preventative measures.

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.

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.

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.

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.

Green Verification Report - GR-L238 PWT I-Joists:
PWT™ I-Joists

Green Verification Report - GR-L259 Roseburg Forest Products Company I-Joists:
Roseburg RFPI® Series I-Joists

Green Verification Report - GR-L274 Nordic Structures I-Joists:
Nordic Joist™ Prefabricated Wood I-Joists

Green Verification Report - GR-L330 IB EWP Inc. I-Joists:
IB Series I-Joists

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

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.

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.

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 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.

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.

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.

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.

I-Joist Floor Details for 2-Inch-Thick Foundation Foam Insulation Technical Topic - TT-129 This publication presents four construction details for incorporating 2-inch-thick foundation foam insulation into residential I-joist floor assemblies.

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.

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.

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.

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