Technical Document Library
Research-Backed Guidance for Every Project
Research-Backed Guidance for Every Project
Technical Guides -
Data File - B840
This publication provides minimum requirements that plywood panels must meet to qualify for classification as APA 303 Series specialty siding.
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.
Technical Guides -
A Guide to the 2015 IRC Wood Wall Bracing Provisions
Technical Guides -
A Guide to the 2018 IRC Wood Wall Bracing Provisions + Free Digital 2021 Supplement
Technical Topic - TT-100
This publication describes the use of portal-frame design in engineered applications and as bracing in conventional light-frame construction
Technical Note - T230
This publication describes single- and double-layer all-wood floor assemblies for acoustic performance and includes both construction details and acoustic ratings
Construction Guide - M400
This publication explains the components of advanced framing in floor and wall framing, including illustrated construction details
Technical Topic - TT-107
This publication answers questions regarding the performance of wood structural panels as air barriers
Technical Guides - X400
This publication explains the APA panel trademark and quality standards for wood structural panels
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 - V691
Discusses specifications and design details for the APA panel-deck block pallet, including load capacity, nailing schedules and materials handling system compatibility.
Builder Tip - Z735
This publication includes important tips for storage, handling and jobsite use of APA Performance Rated I-Joists.
Technical Note - R280
This publication provides specification and installation recommendations for panel subfloors to be used under hardwood flooring
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 - W345
This publication details connection requirements and application notes for APA Performance Rated Rim Board
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
Specification Guide - SP-1103
This publication provides an overview of the APA trademark and includes a sample specification for APA Rated Sheathing.
Technical Note - C465
This publication provides installation recommendations and test results for energy-saving APA Sturd-I-Wall construction
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).
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).
Technical Guides - S700
This publication discusses the benefits of using laminated veneer lumber (LVL) beams and headers for window and door framing applications
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
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).
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
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
Technical Guides - Q230
This guide provides basic instructions for using the APA Wall Bracing Calculator
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.
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 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
Technical Note - F410
This publication describes mechanism and construction features that contribute to siding buckling
Build A Better Home - A525
This publication outlines the characteristics of mold and mildew, the effect they can have on a structure and its inhabitants, and provides methods for prohibiting their growth.
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.
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 - A530
This publication describes the primary sources of moisture intrusion in wood wall construction and recommends methods to prevent moisture penetration.
Technical Guides - J440
This publication provides five basic steps to construct energy-saving wood wall systems that meet code, are durable to the forces of nature and help homeowners save money.
Builder Tip - S300
This publication describes how to reduce nail pops through recommended fastener selection and installation
Builder Tip - F435
This publication highlights essential details for using the APA narrow wall bracing method around garage openings.
Builder Tip - Q300
This publication describes how to prevent floor complaints and callbacks with proper floor sheathing installation
Builder Tip - K310
Describes installation techniques for plywood and OSB roof sheathing and roof ventilation techniques that will help minimize the potential for buckling of asphalt shingles
Builder Tip - F455
This publication describes best practices for storage and installation of glued laminated timber (glulam).
Builder Tip - M300
This publication contains spacing recommendations for APA Rated Sheathing, APA Rated Sturd-I-Floor® and APA Rated Siding.
Builder Tip - R340
This publication provides an overview of selection, handling, installation and fastening of APA plywood underlayment.
Builder Tip - R540
This publication provides recommendations for storage and handling of glulam beams.
Technical Guides - M310
This publication illustrates nine construction details that improve wind resilience in residential construction, with real-world examples of each design
Technical Topic - TT-025
This publication discusses fire test results comparing the burn-through resistance of oriented strand board (OSB) and plywood.
Technical Note - Y245
This publication describes the natural fire resistance of glulam beams and columns and provides fire endurance calculation methods
Technical Topic - TT-091
Details the layups for APA 303 grooved plywood sidings (T1-11 and reverse board & batten), representing minimal plywood siding constructions as typically found in the marketplace.
Technical Guides - Q701
This publication is designed for use by mills as an aid in manufacturing and grading Canadian Standards Association (CSA) plywood panels.
Technical Note - X227
This publication discusses recommended maximum caster loadings for various wheel types and sizes on bare plywood, Plyron and overlaid plywood surfaces.
Technical Topic - TT-006
This publication describes Tile Council of North America (TCNA) specifications for wood structural panel floor systems under ceramic tile, tested in accordance with ASTM C627
Technical Guides - V345
This publication contains grade information, form maintenance recommendations, design information and case studies related to plywood concrete forming
Technical Note - X485
This publication explains causes of condensation, identifies areas prone to condensation issues, and provides options to control condensation
Builder Tip - M300 LA
Recomendaciones de espacio entre paneles de clasificación “APA Rated Sheathing,” los pisos de clase Sturd-I-Floor® de APA y los paneles de clasificación “APA Rated Siding."
Builder Tip - S300 LA
Esta publicación describe cómo reducir los clavos sobresalientes con la selección e instalación recomendada de elementos de fijación.
Data File - D720
This publication identifies the causes of and remedies for excessive floor vibration.
Builder Tip - Q300 LA
Esta publicación describe cómo prevenir quejas y arreglos del sistema de piso con una instalación correcta del tablero estructural.
Technical Guides - X235
This publication discusses designing, building and specifying wood structural panel containers and bins for industrial materials handling applications.
Technical Note - R495
This publication discusses decay fungi and how to prevent/minimize degradation of wood through proper design, storage, construction and maintenance
Technical Guides - S500
This publication describes the stringent product standards required for cross-laminated timber manufactured in North America, which may not be met by imported products
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
Data File - L335
This publication provides recommendations for the installation and preparation of underlayment under finish flooring in residential and light commercial applications
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.
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 Note - T555
This technical note presents a rational analysis for applying FTAO to walls with asymmetric piers and walls with multiple openings, based on APA modeling and testing
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-097
This publication explains the design considerations for installing a wood structural panel diaphragm over existing board sheathing (decking) in floors or roofs.
Technical Topic - TT-014
This publication describes various wood structural panel manufacturing processes that result in the eradication of insects
Technical Guides - L350
This publication provides design and construction recommendations for engineered diaphragm systems in floor, shear wall and roof systems
Technical Topic - TT-115
This technical topic presents the results and discussion of full-scale testing of double-sheathed shear walls with both layers of wood structural panels on a single side.
Technical Topic - TT-029
This publication discusses causes of surface dusting on concrete surfaces when poured against plywood forms and provides tips for prevention and remedial action.
Technical Topic - TT-075
This publication discusses a test program conducted by APA to investigate the effect of constructing shear walls with green framing lumber
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 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 Topic - TT-012
This publication provides suggested guidelines for determining if overdriven fasteners will affect the shear capacity of diaphragm or shear wall construction
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-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
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-IJ
This publication is an excerpt from the APA Engineered Wood Construction Guide, providing a description and specification recommendations for I-joist
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
Excerpt - E30X-RB
This publication is an excerpt from the APA Engineered Wood Construction Guide, providing guidance on selecting and specifying rim board
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
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)
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.
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
Technical Guides - X505
This publication provides a list of engineered wood products and common construction terminology explained in easy-to-understand language.
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
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 Topic - TT-133
This publication discusses buckling, fastener recommendations, surface flaking, thickness swell, linear expansion and moisture management of OSB wood structural panels
FAQ - F505
This publication answers questions about structural plywood and OSB panel performance, grade, growth and natural characteristics.
FAQ - X501
This publication provides guidance about the serviceability of wood structural panels (plywood and OSB) after exposure to high levels of moisture.
Technical Note - E830
This publication summarizes APA test data on ultimate withdrawal and ultimate lateral loads for plywood joints fastened with wood screws and sheet metal screws.
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 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 Note - J805
This publication describes methods for field restoration of plywood to near its original condition and appearance
Builder Tip - Q350
This publication describes recommended finishes and application recommendations for APA Rated Siding.
Technical Topic - TT-033
This publication discusses recommendations and exceptions for finishing glulam manufactured entirely from solid-sawn lumber.
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
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 - K320
Discusses fire-retardant-treated plywood specifications, code-compliant applications, testing standards and structural requirements for commercial and residential construction.
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.
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
Technical Topic - TT-128
This publication discusses the results of a series of CAN/ULC-S102 tests of flame-spread rating (FSR) and smoke developed classification (SDC) for OSB sheathing in Canada
Technical Note - C468
This publication discusses typical floor squeak causes and provides corrections and preventative measures.
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.
Technical Topic - TT-080
This publication answers FAQs about portal frame construction from the APA 2018 IRC wall bracing webinar series
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.
Product Guide - X440
This product guide provides an overview of APA trademarked glulam and discusses design considerations, applications and specification
Technical Topic - TT-024
This publication discusses how to avoid floor panel puncture from drywall carts by consulting PS 2 for minimum concentrated static loads and heavy concentrated loads
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
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.
Technical Topic - TT-129
This publication presents four construction details for incorporating 2-inch-thick foundation foam insulation into residential I-joist floor 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
Product Advisory - SP-1185
This publication provides test results for imported plywood panels from Brazil, evaluated for conformance to U.S. Product Standard PS 1
Data File - Q370
This publication describes recommended wall construction methods for the installation of stucco exterior finish over structural wood panel wall sheathing
Technical Guides - X305
This publication explains how to design wood-frame buildings to withstand the lateral loads typical of high wind and seismic zones.
Technical Guides - F430
This publication explains IRC-compliant wall bracing, explains why bracing is important and shows how to meet basic requirements for wall bracing in accordance with the code
Research Report - M410
This report contains research results on force transfer around openings (FTAO). This study was a joint effort between APA, the USDA FPL and the UBC.
Technical Guides - A236 LA
las especificaciones de la norma PS 1 para madera contrachapada para cumplir con los criterios de rendimiento de los materiales establecidos en ACI 318/347, según lo exige el IBC
Product Advisory - SP-1172
This product advisory contains results of testing to measure the shear wall performance of Thermo-Ply® sheathing
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.
Data File - Z350
This publication describes techniques and products for code-required connections in wood roof systems in high wind and seismic zones.
Technical Topic - TT-063
This publication discusses the advantages of using IBC and UL recognized oriented strand board (OSB) and plywood wall assemblies over other products.
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
Technical Guides - M200
This publication discusses the use of APA-trademarked wood structural panels in materials handling applications including pallets, crates, bins, shelving and mezzanine floors.
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.
Technical Note - E710
This publication covers vibration perception, fundamental natural frequency, criteria for floor vibration control and guidelines to remedy existing floor vibration problems.
Technical Note - R525
This publication provides recommendations for minimizing moisture accumulation in panelized low-slope roof systems in commercial and industrial applications
Technical Topic - TT-002
This publication provides recommended bond classification appropriate for end use in-service moisture conditions.
Technical Topic - TT-028
This publication discusses linear expansion and thickness swell in wood structural panels due to moisture
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)
Technical Topic - TT-094
This publication provides tables of the minimum recommended nail spacing for APA EWS Rim Boards and I-joists.
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)
Technical Guides - W460
This publication is a guide to noise-rated wood-frame construction systems, including STC and IIC ratings for tested wall and floor assemblies for effective sound control.
Technical Note - B429
This publication explains how to determine partition load, including situations where additional joists are required to account for the weight of partition walls.
Product Guide - W410
This product guide provides an overview of oriented strand board (OSB) and discusses OSB composition, properties, code acceptances and applications
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
Technical Guides - D510
This publication describes recommended design capacities (ASD) and design methods for wood structural panels manufactured under PS 1 and PS 2 and APA Performance Standard PRP-108.
Technical Note - R275
This publication provides recommendations from APA research on the performance of 24-inch and narrower roof sheathing panels
Technical Topic - TT-054
This publication provides guidance on how to comply with NIST panel thickness regulations while still providing for traditional specifications used in the U.S. model building codes
Builder Tip - N330
This publication discusses recommended panels and spans for open and closed soffits.
Product Advisory - SP-1186
This publication discusses overstated published lateral load design properties of eight flexible structural sheathing products
Construction Guide - Z725
This publication discusses span ratings, installation details, cantilever designs, architectural specifications and engineering design properties for APA Performance Rated I-Joists
Product Guide - F405
This product guide describes performance standards, applications, trademark and performance category information for APA Performance Rated Panels
Technical Guides - D710
This publication includes recommended construction details for I-joists in roof applications.
Technical Guides - Y510
This publication includes section properties, recommended design stresses and design methods for plywood manufactured under Voluntary Product Standard PS 1
Technical Guides - S811
This publication presents the recommended method for the design and fabrication of curved plywood roof panels. It is a supplement to the APA plywood design specification.
Technical Guides - S812
This publication presents the recommended method for the design and fabrication of glued plywood and lumber beams.
Technical Guides - U813
This publication provides recommendations for the design and fabrication of plywood stressed-skin panels. It is a supplement to the APA Plywood Design Specification.
Technical Guides - U814
This publication presents the recommended method for the design and fabrication of flat plywood sandwich panels. It is a supplement to the APA Plywood Design Specification.
Technical Guides - H815
This publication presents the recommended methods for the design and fabrication of staple-glued all-plywood beams.
Technical Topic - TT-047
This publication discusses the standards under which plywood and oriented strand board (OSB) are qualified and the interchangeability of the two products, depending on the end use
Data File - Q220
This publication discusses preservative-treated plywood covering treatment types, use categories, retention levels, fasteners, finishing and safe handling per AWPA standards.
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)
Technical Note - S580
This publication provides a summary of preservatives, treatment recommendations, use, handling and finishing tips for preservative-treated glulam beams
Technical Note - T350
This publication discusses how to minimize the risk of future wood flooring problems when moisture at the jobsite is an issue
Product Guide - B360
Describes high density overlay (HDO) and medium density overlay (MDO) plywood applications, properties and characteristics, and shop practice and finishing recommendations
Product Guide - E300
Describes the following for performance rated siding: face grades, textures and patterns; finishing; ordering/specifying; basic application recommendations
Product Guide - K435
This publication describes the specification, advantages, applications and finishing recommendations of sanded plywood and includes trademark examples and explanations
Builder Tip - N335
This publication provides step-by-step instructions for roof sheathing installation
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.
Technical Guides - R330
This publication describes the key components of raised-heel trusses and identifies the advantages of using them in conjunction with continuous wood structural panel wall sheathing
Technical Topic - TT-119
This publication describes APA recommended guidelines for snow and ice accumulation on wood structural panels
Technical Topic - TT-021
Table of recommended uniform live loads for PS 1 APA 303 siding when used as open soffit or combined roof decking-ceiling with long dimension perpendicular to supports.
Technical Topic - TT-105
This publication discusses the International Residential Code (IRC) wall sheathing requirements regarding wind pressure
Research Report - E315
This publication describes tests of high-load diaphragms with multiple rows of fasteners, glued diaphragms, and diaphragms with openings
Research Report - Q260
This report includes test results of unblocked, stapled and metal-framed shear walls, and a summary of previous shear wall tests.
Technical Topic - TT-130
This publication provides a method for garage door installation with back-hangs that are attached to the bottom flange of residential I-joists with lag screws.
Customer Service Tip - W503
This publication discusses the causes, prevention and remedial treatment for floor sheathing ridging.
Construction Guide - R305
This publication provides specification recommendations for plywood and OSB roof systems and installation recommendations for panel roofs
Technical Topic - TT-052
This publication provides information about the performance, proper specification and application of oriented strand board (OSB) products.
Data File - Y250
This publication discusses diaphragm perimeter nailing and transfer of shear wall forces from the walls above into the foundation/wall framing.
Technical Topic - TT-076
This publication provides an evaluation of double 2x framing members as substitutes when single 3x framing members at adjoining panel edges are specified by code for shear walls
Technical Topic - TT-087
This publication provides results from full-scale shear-wall tests and demonstrates the conservative capacities given in ESR-1539.
Technical Guides - T210
This publication details 10 common sources of air infiltration that should be checked and sealed during construction
Technical Topic - TT-055
This publication discusses the SIZED FOR SPACING notation in the APA trademark stamp and the option of trimming panels slightly to encourage proper panel spacing
Technical Topic - TT-058
This publication discusses the practice of driving nails at a slight angle in shear walls and diaphragms, and the difference between slant nailing and toe-nailing.
Technical Topic - TT-026
This publication discusses the effect of small cracks radiating from corners of the flange groove on I-joist structural capabilities
Customer Service Tip - W501
This publication explains why wood structural panels sometimes feel soft or springy.
Technical Topic - TT-113
This publication addresses how to prevent adverse effects on wood I-joist floor framing from improperly designed, installed or operated underfloor heat systems
Technical Note - J745_SUP
This publication is a supplement to Technical Note: Sprinkler Pipe Installation for APA Performance Rated I-Joists, Form J745, with sprinkler pipe installation design details.
Technical Note - J745
This publication provides guidance on attachment of steel and CPVC sprinkler systems to APA Performance Rated I-Joists.
Technical Topic - TT-059
This publication discusses the causes of concrete staining and provides some possible solutions
Builder Tip - U450
This publication provides guidelines to help protect panels from damage in storage, during shipment and on the jobsite
Product Guide - H650
This publication covers SIP advantages, applications, design and construction considerations, connection details, assembly and related topics.
Technical Guides - V440
This publication provides guidelines on installing wood structural panel subfloors for optimal performance of finished floors.
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.
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 Guides - R311CAF
Aperçu des systèmes de murs couramment utilisés et de la manière dont les panneaux structuraux en bois peuvent satisfaire aux exigences fondamentales dans les applications murales.
Technical Note - J735
Provides recommendations for properly placing heavy loads in a partially completed light-framed structure to prevent damage to the structure and/or injury to the work crew
Technical Note - U425
This publication discusses expansion joint details for buildings with dimensions larger than 80 feet
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.
Damage Assessment Report - SP-1182
This report summarizes the findings of a team of engineers who visited the site of a 2017 Texas windstorm to assess the damages sustained by residences
Damage Assessment Report - SP-1177
This publication contains damage assessments from the December 2015 tornado storm near Dallas, TX, including wind-resistant construction recommendations
Technical Guides - A236
This publication describes the importance of adhering to PS 1 plywood specifications to meet the material performance criteria outlined in ACI 318 & ACI 347, as mandated by the IBC
Technical Guides - R505
This publication explains how to use a performance path to meet International Energy Conservation Code (IECC) requirements while balancing cost and structural requirements.
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
Technical Note - J450
This publication addresses the water vapor permeance of wood structural panels and vapor retarders and their role in wall-system design
Technical Topic - TT-110
This publication discusses wind resistance of light-framed walls sheathed with plywood or OSB using the methodology of the 2012 IBC Table 2304.6.1 and the 2012 IRC Table R602.3(3)
Technical Guides - G310
This publication presents tested assembly details for roof systems with APA wood structural panels used as substrate that meet classifications of FM approval or UL.
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.