Technical Document Library
Research-Backed Guidance for Every Project
Research-Backed Guidance for Every Project
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.
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.
Technical Guides - Q705
This publication provides simple steps to proper installation that ensures glulam beams perform as designed.
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.
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.
Standards - ANSI 117-2025
This ANSI Standard provides information for the design of structural glued laminated timber (glulam), reference values for glulam design and specific layup requirements.
Standards - ANSI 405-2023
This ANSI standard provides minimum requirements to evaluate adhesives for use in structural glued laminated timber. This document is a revision of ANSI 405-2018.
Standards - ANSI A190.1-2022
This ANSI Standard contains requirements for the manufacture and quality control of structural glued laminated timber.
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
Technical Guides - W345 CA
This publication describes connection requirements and application notes for APA Performance Rated Rim Board for Canadian Limit States Design
Technical Topic - TT-104
This publication explains the difference between apparent modulus of elasticity (MOE) and shear-free MOE in glulam beams
Case Studies - R145
This case study discusses how glulam beams, planks, girders and columns were used to structurally and aesthetically restore the historic Appleton Mills complex in Lowell, MA.
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.
Case Studies - Q125
This case study explains how glulam beams were used to replace the flooring system of the historic Audrian Building, enabling the building to support multi-ton vintage automobiles.
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.
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.
Typical Details - DT-GB-3
This detail shows a glulam beam connection to an end wall with I-joists bearing on the beam.
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.
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.
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.
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.
Case Studies - R130
This case study discusses the Brelsford WSU visitor center’s use of several engineered wood products, including CLT and glulam.
Builder Tip - F435
This publication highlights essential details for using the APA narrow wall bracing method around garage openings.
Builder Tip - F455
This publication describes best practices for storage and installation of glued laminated timber (glulam).
Builder Tip - R540
This publication provides recommendations for storage and handling of glulam beams.
Technical Note - Y245
This publication describes the natural fire resistance of glulam beams and columns and provides fire endurance calculation methods
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.
Typical Details - DT-GB-11
This detail shows two connection options for a continuous glulam floor beam bearing on a wood support.
Technical Note - R495
This publication discusses decay fungi and how to prevent/minimize degradation of wood through proper design, storage, construction and maintenance
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.
Data File - Y240
This publication provides information on member sizes and layup, design stresses, column design equations and design tables and examples.
Technical Topic - TT-014
This publication describes various wood structural panel manufacturing processes that result in the eradication of insects
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
Technical Guides - E30
This publication provides a comprehensive overview of engineered wood construction systems for residential, commercial and industrial buildings
Excerpt - E30X-AFBS
Summary of special systems, including fire resistant construction, fire protected assemblies, wind-resistive roofs, energy conservation and panels over metal framing
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
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)
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
Case Studies - W170
This case study discusses two Washington school districts that creatively leveraged the benefits of exposed wood products in newly constructed schools.
Technical Guides - X505
This publication provides a list of engineered wood products and common construction terminology explained in easy-to-understand language.
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.
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-1940
Canfor, WFP Engineered Products, LLC
ESR Joint Evaluation Report - ESR-4874
Glulam:
ESR Joint Evaluation Report - ESR-5815
Glulam:
Technical Note - R475
This publication discusses checking in glulam beams and includes a flowchart and equations for determining allowable check size
Technical Topic - TT-108
This publication clarifies the intent of the California Building Code exemption for special inspection on glulam outlined in Section 1705.5.4
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
Technical Topic - TT-033
This publication discusses recommendations and exceptions for finishing glulam manufactured entirely from solid-sawn lumber.
Technical Guides - W305
This publication is a guide to cost-effective fire-rated wood and wood structural panel systems that meet code requirements
Technical Topic - TT-127
This publication provides a summary of results of an APA/USDA Forest Product Laboratory pilot test program examining structural properties of Fire-Retardant Treated glulam.
Case Studies - U115
This case study discusses how CLT panels and glulam framing delivered cost savings, a faster schedule and sustainability benefits for First Tech Federal Credit Union.
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.
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.
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.
Technical Guides - S475
This publication provides recommended design load tables for glulam beam roof and floor applications
Technical Note - Y110
This publication clarifies the distinction between appearance considerations and structural properties of glulam timbers and appearance classifications of glulam members.
Technical Note - S550
This publication discusses how camber reduces the adverse effects of beam deflection
Construction Guide - T300
This publication shows correct connections and common connection errors involving glued laminated (glulam) timbers
Technical Guides - C415
This publication contains span tables for glulam floor beams in residential construction, tables for substituting glulam for steel beams and design details.
Technical Guides - C410
This publication provides connection details and installation recommendations for glulam in residential garage door framing.
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.
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.
Product Guide - X440
This product guide provides an overview of APA trademarked glulam and discusses design considerations, applications and specification
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-L251
Glulam:
Green Verification Report - GR-L294
Glulam:
Green Verification Report - GR-L343
Glulam, Rim Board:
Case Studies - S110
This case study discusses the use of hybrid trusses combining glulam arches, glulam purlins and steel bottom chords at the Buffalo Sabres’ practice ice rinks.
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.
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.
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.
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
Case Studies - R110
This case study explains how glulam beams and Douglas-fir columns helped the Jackson Hole Airport meet strict height limits and seismic demands.
Typical Details - DT-GB-13
This detail shows two floor joist flush connections options: one face mounted hanger and one top mounted hanger.
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.
Case Studies - N115
This case study discusses how curved glulam beams enabled dramatic design, seismic resilience and cost effectiveness for the LeMay Car Museum in Tacoma, Washington.
Case Studies - R115
This case study discusses how glulam beams solved complex structural challenges on a pentagon-shaped coastal house.
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.
Case Studies - R135
This case study discusses how glulam beams reduced costs and streamlined installation on a 5,200 square foot custom Colorado home.
Case Studies - V135
This case study discusses how CLT and glulam helped First United Bank achieve construction and energy efficiencies.
Technical Note - R525
This publication provides recommendations for minimizing moisture accumulation in panelized low-slope roof systems in commercial and industrial applications
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.
Technical Topic - TT-098
This publication discusses the benefits of mulching construction-related wood scraps, including glued engineered wood products
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)
Case Studies - S120
This publication discusses how glulam framing and engineered wood helped Portland’s One North development achieve energy efficiency and sustainability.
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.
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 Product Reports - PR-E740
Boise Cascade Wood Products, LLC, Nordic Structures
APA Product Reports - PR-L251
Glulam:
APA Product Reports - PR-L263
Glulam:
APA Product Reports - PR-L269
Glulam, Rim Board:
APA Product Reports - PR-L275
Glulam:
APA Product Reports - PR-L282
Glulam:
APA Product Reports - PR-L294
Glulam:
APA Product Reports - PR-L294C
Glulam:
APA Product Reports - PR-L297
Glulam:
APA Product Reports - PR-L305
Rim Board, Glulam:
APA Product Reports - PR-L313
Glulam:
APA Product Reports - PR-L317
Glulam:
APA Product Reports - PR-L321
Glulam:
APA Product Reports - PR-L322
Glulam:
APA Product Reports - PR-L326
Glulam:
APA Product Reports - PR-L333
Glulam:
APA Product Reports - PR-L344
Glulam:
APA Product Reports - PR-L345
Glulam:
APA Product Reports - PR-L346
Glulam:
APA Product Reports - PR-L348
Glulam:
APA Product Reports - PR-L350
Glulam:
APA Product Reports - PR-L350C
Glulam:
APA Product Reports - PR-L351
Glulam:
APA Product Reports - PR-L351C
Glulam:
APA Product Reports - PR-L352
Glulam:
APA Product Reports - PR-L353
Glulam:
APA Product Reports - PR-L354
Glulam:
APA Product Reports - PR-L354C
Glulam:
APA Product Reports - PR-L355
Glulam:
Typical Details - DT-EWG-32
This detail shows a prefabricated APA wood structural panel roof assembly with purlins installed perpendicular to the supports.
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)