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.
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 - 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.
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.
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 Guides - S700
This publication discusses the benefits of using laminated veneer lumber (LVL) beams and headers for window and door framing applications
Technical Topic - TT-104
This publication explains the difference between apparent modulus of elasticity (MOE) and shear-free MOE in glulam beams
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.
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.
Technical Topic - TT-014
This publication describes various wood structural panel manufacturing processes that result in the eradication of insects
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
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-SCL
This publication is an excerpt from the APA Engineered Wood Construction Guide, providing descriptions and specification recommendations for structural composite lumber (SCL)
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 - C440
This case study discusses how engineered wood products helped overcome structural, acoustic and cost challenges at a North Carolina senior living expansion project.
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-1040
SCL:
ESR Joint Evaluation Report - ESR-1053
SCL:
ESR Joint Evaluation Report - ESR-1210
Rim Board, SCL:
ESR Joint Evaluation Report - ESR-1618
SCL:
ESR Joint Evaluation Report - ESR-2725
SCL:
ESR Joint Evaluation Report - ESR-2909
Rim Board, SCL:
ESR Joint Evaluation Report - ESR-2913
SCL:
ESR Joint Evaluation Report - ESR-4759
SCL:
ESR Joint Evaluation Report - ESR-4760
SCL, CLT:
ESR Joint Evaluation Report - ESR-5157
CLT, SCL:
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.
Technical Topic - TT-118
This publication provides a summary of structural composite lumber (SCL) fire performance based on model building codes and research literature.
Technical Guides - W305
This publication is a guide to cost-effective fire-rated wood and wood structural panel systems that meet code requirements
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-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 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
SCL, Rim Board:
Green Verification Report - GR-L289
Rim Board, SCL:
Green Verification Report - GR-L329
SCL:
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
Typical Details - DT-AF-2
This detail shows an insulated three-stud outside corner (California corner) framing assembly.
Typical Details - DT-AF-3
This detail shows an insulated three-stud inside corner framing assembly.
Typical Details - DT-AF-4
This detail shows connections of intersecting single 2x top plates with steel plates and alternate lumber splice connections.
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.
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.
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.
Typical Details - DT-AF-7
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)
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.
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.
Technical Guides - S812
This publication presents the recommended method for the design and fabrication of glued plywood and lumber beams.
APA Product Reports - PR-E720
Boise Cascade Wood Products, LLC, Murphy Company, PWT, Roseburg Forest Products Company, Tolko Industries Ltd.
APA Product Reports - PR-L233
Rim Board, SCL:
APA Product Reports - PR-L233C
SCL, Rim Board:
APA Product Reports - PR-L260
SCL:
APA Product Reports - PR-L283
SCL:
APA Product Reports - PR-L284
SCL:
APA Product Reports - PR-L284C
SCL:
APA Product Reports - PR-L289
Rim Board, SCL:
APA Product Reports - PR-L289C
Rim Board, SCL:
APA Product Reports - PR-L292
SCL:
APA Product Reports - PR-L301
SCL:
APA Product Reports - PR-L307
SCL:
APA Product Reports - PR-L312
SCL:
APA Product Reports - PR-L316
SCL:
APA Product Reports - PR-L324
SCL:
APA Product Reports - PR-L325C
SCL, CLT:
APA Product Reports - PR-L329
SCL:
APA Product Reports - PR-L334
SCL:
APA Product Reports - PR-L335
SCL:
APA Product Reports - PR-L349C
SCL:
APA Product Reports - PR-S201
SCL, I-Joists, Rim Board:
APA Product Reports - PR-S238
Rim Board, SCL, I-Joists:
APA Product Reports - PR-S259
I-Joists, SCL, Rim Board:
Technical Note - E705
This publication provides recommendations for safe handling and storage of I-joists and LVL, as well as best practices for cut-up at distribution and moisture effects.
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
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
Data File - Y250
This publication discusses diaphragm perimeter nailing and transfer of shear wall forces from the walls above into the foundation/wall framing.
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.
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.
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.
Technical Topic - TT-082
Explains the relationships among bending deflection, shear deflection, total deflection, apparent modulus of elasticity and true modulus of elasticity in prismatic bending members
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.
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.