Technical Document Library

Proper Installation of APA Rated Sheathing for Roof Applications Builder Tip - N335 This publication provides step-by-step instructions for roof sheathing installation

Build a Better Home: Moisture-Resistant Roof Construction Technical Guides - A535 This publication describes several roof design and weatherproofing methods used to keep water out of a home’s interior.

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

APA Panel Roof Sheathing Typical Details - DT-EWG-2 This detail shows APA Rated sheathing panels installed as roof decking over rafters or trusses with panel clips, asphalt or wood shingles, and proper edge and joint spacing.

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Panel Edge Support for Narrow-Width Roof Sheathing Technical Note - R275 This publication provides recommendations from APA research on the performance of 24-inch and narrower roof sheathing panels

Roof Construction (Canada) Construction Guide - R305 This publication provides specification recommendations for plywood and OSB roof systems and installation recommendations for panel roofs

Wood Structural Panel Sheathing on Hip Roofs Technical Topic - TT-083 This publication provides installation guidelines for hip-roof panel applications on trusses spaced 24 in. o.c. that address serviceability issues and improve performance

Roof Ridge Detail—Pan and Cover Tile Typical Details - DT-BB-5 This detail shows pan and cover tile roof ridge detail of APA rated sheathing.

Wall to Roof Flashing—Stucco Typical Details - DT-BB-12 This detail shows wall-to-roof flashing detail at stucco-clad wall.

Wall to Roof Flashing—Brick Veneer Typical Details - DT-BB-11 This detail shows wall-to-roof flashing detail at brick veneer roof intersection.

APA Rated Sheathing Specification Guide - SP-1103 This publication provides an overview of the APA trademark and includes a sample specification for APA Rated Sheathing.

APA Panel Wall Sheathing Typical Details - DT-EWG-5 This detail shows APA Rated wall sheathing applied in two orientations- strength axis across or parallel to studs- with weather-resistive barrier and siding on a wood-framed wall.

Performance of Flexible Structural Sheathing Product Advisory - SP-1186 This publication discusses overstated published lateral load design properties of eight flexible structural sheathing products

Performance-Rated I-Joist Roof Framing Details Technical Guides - D710 This publication includes recommended construction details for I-joists in roof applications.

Lateral Load Connections for Low-Slope Roof Diaphragms Data File - Z350 This publication describes techniques and products for code-required connections in wood roof systems in high wind and seismic zones.

Typical Connections to Engineered Flat Roof Members Typical Details - DT-EWG-35 This detail shows four connection methods for flat roof systems: to wood I-joists, open-web parallel-chord wood trusses, steel bar joists with wood nailer and glulam beams.

Stucco Over APA Panel Sheathing Typical Details - DT-EWG-34 Stucco cladding assembly applied over APA Rated wood structural panel sheathing with two layers of weather-resistive barrier, self-furring metal lath, and metal bead.

Wind-Rated Roofs: Designing Commercial Roofs to Withstand Wind Uplift Forces 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.

Preframed Roof Panel 8' x 8' Perpendicular to Supports Typical Details - DT-EWG-32 This detail shows a prefabricated APA wood structural panel roof assembly with purlins installed perpendicular to the supports.

Wood Structural Panel Heavy Timber Roof Construction, 2-Dimensional Detail 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.

Brick Veneer Over APA Panel Sheathing Typical Details - DT-EWG-14 This detail shows brick veneer or masonry cladding installed over APA Rated wood structural panel sheathing.

Wood Structural Panels Used as Nailable Sheathing Technical Topic - TT-109 This publication discusses how wood structural panels can withstand earthquake, wind, wind suction and pressure loads while permitting the anchorage of lightweight siding materials

Wind Rated Roofs: UL Class 90 (NMS520) Typical Details - DT-WRR-2 This detail shows wood roof assembly with plywood decking over purlins/trusses with two-ply asphalt glass fiber mat roofing system, rated UL Class 90

**Please note this image may have been edited or manipulated to enhance visual quality**

Nail-Base Sheathing for Siding and Trim Attachment Construction Guide 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)

Flame-Spread Rating for Oriented Strand Board (OSB) Sheathing in Canada 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

APA Rated Lap Siding Over Wood Structural Panel Sheathing Typical Details - DT-EWG-6 This detail shows APA Rated lap siding installed over wood structural panel sheathing with a weather-resistive barrier on a wood-framed exterior wall assembly.

APA Rated Panel Siding Over Wood Structural Panel Sheathing Typical Details - DT-EWG-7 This detail shows APA Rated siding panels applied over wood structural panel sheathing with a weather-resistive barrier on a wood-framed wall assembly.

APA Rated Siding Exterior, 5/8" Type X Gypsum Sheathing Typical Details - DT-FR-4 This detail shows a one-hour fire-rated wood-framed wall assembly with Type X gypsum sheathing and wallboard, optional insulation, and APA rated siding exterior finish.

Installation of Stucco Exterior Finish Over Wood Structural Panel Wall Sheathing Data File - Q370 This publication describes recommended wall construction methods for the installation of stucco exterior finish over structural wood panel wall sheathing

Sheathing Reinforcement for Cantilevered I-Joist for Vertical Building Offset One Side Typical Details - DT-IJ-11 This detail shows installation of a sheathing reinforcement on cantilevered I-joists at a vertical building offset and specifies a reinforcement for one side of the I-joist.

Sheathing Reinforcement for Cantilevered I-Joist for Vertical Building Offset Two Sides Typical Details - DT-IJ-12 This detail shows installation of a sheathing reinforcement on cantilevered I-joists at a vertical building offset and specifies reinforcement for two sides of the I-joist.

APA-Generic-Content-Card-Technical-Topic

Service Life of Oriented Strand Board (OSB) Sheathing Technical Topic - TT-052 This publication provides information about the performance, proper specification and application of oriented strand board (OSB) products.

Energy-Heel Truss Attachment to Sheathing Typical Details - DT-RH-1 This detail shows raised heel energy truss attachment to an exterior wall for additional attic insulation space.

Stucco (Over Self-Furring Metal Lath), APA Rated Sheathing Exposure 1 Plywood or OSB Typical Details - DT-FR-22 This detail shows a fire-rated wall assembly of stucco over self-furring metal lath with APA rated sheathing, optional insulation, gypsum wallboard, and wood studs.

APA Rated Siding Exterior or Other Exterior Finish (Code-Recognized Type), 5/8" Type X Gypsum Sheathing, Minimum 15/32" APA Rated Sheathing Exposure 1 OSB or Plywood Typical Details - DT-FR-2 This detail shows a fire-rated wall assembly using wood structural panel sheathing over studs with gypsum wallboard, fire protective membrane, and glass fiber insulation.

APA Rated Siding Exterior or Other Exterior Finish (Code-Recognized Type), 5/8" Type X Gypsum Sheathing, Minimum 7/16" APA Rated Sheathing Exposure 1 OSB or Plywood Typical Details - DT-FR-3 This detail shows fire-rated exterior wall assembly with APA rated siding over sheathing, insulation, 2x4 wood framing at 16" on center and Type X gypsum wallboard interior finish.

APA Rated Siding Panels Over Rigid Foam Insulation Sheathing Technical Note - C465 This publication provides installation recommendations and test results for energy-saving APA Sturd-I-Wall construction

Load-Bearing Fire-Rated Wall Assemblies with OSB & Plywood Wall Sheathing 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.

One-Hour Combustible Floor-Ceiling And Roof-Ceiling Assemblies - I-Joists Typical Details - DT-EWG-28 This detail shows one-hour fire-resistive floor/ceiling assemblies using wood I-joists with APA Sturd-I-Floor decking and gypsum wallboard ceiling systems with furring channels.

Canterwood; Gig Harbor, Washington; Rush Construction Co. 2x6 framing with OSB wall sheathing

Simple Air Sealing with OSB and Plywood Sheathing Technical Guides - T210 This publication details 10 common sources of air infiltration that should be checked and sealed during construction

Minimum 1/2" APA Rated Siding Exterior Plywood, 1" Rigid Foam Insulation Sheathing; Exterior Finish-Elastomeric Coating, 1" Rigid Foam Insulation Sheathing, Minimum 1/2" APA Rated Sheathing Exposure 1 Plywood Typical Details - DT-FR-7 Fire-rated wall assembly of two UL-rated configurations (U330 and U335) with different exterior finishes over wood framing with mineral wool or glass fiber insulation.

Wind Rated Roofs: UL Class 90 (NMS519) Typical Details - DT-WRR-1 This detail shows UL Class 90 rated roof assembly with two-ply asphalt glass fiber mat hot-mopped over plywood sheathing on wood framing with rayon tape.

Moisture Control in Low Slope Roofs Technical Note - R525 This publication provides recommendations for minimizing moisture accumulation in panelized low-slope roof systems in commercial and industrial applications

Designing Diaphragms Over Existing Board Floors or Roofs 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.

Temporary Construction Loads Over I-Joist Roofs and Floors 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

**Please note this image contains an errors or issue with the construction of the building or item. This image should only be used for Educational purposes.**

Builder Tips: How to Minimize Buckling of Asphalt Shingles 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

Open Soffit Typical Details - DT-EWG-31 This detail shows APA Rated sheathing panels installed as an open soffit on exposed roof rafters with weather-protected edges.

UL Class 90 (NM520) Typical Details - DT-WWR-2 This detail shows a wind-resistive roof assembly with hot-mopped built-up roofing over APA-rated plywood sheathing and structural framing, rated U.L. Class 90.

Closed Soffit Typical Details - DT-EWG-15 This detail shows a closed soffit assembly using APA rated roof sheathing and exterior panels for the closed soffit with continuous screened or louvered venting.

Glued Laminated Beam Design Tables Technical Guides - S475 This publication provides recommended design load tables for glulam beam roof and floor applications

Floor framing utilizing steel wide flange beam, rim board, engineered wood I-joists and metal hangers.

Wood Structural Panels Over Metal Framing Technical Guides - T625 This publication provides design and fastening recommendations for installation of wood structural panels over metal framing in floors, walls and roofs.

Building for High-Wind Resilience in Light-Frame Wood Construction Technical Guides - M310 This publication illustrates nine construction details that improve wind resilience in residential construction, with real-world examples of each design

Water Reservoir in Santa Maria, California

Santa Maria Water Reservoir Cover Case Studies - C115 This case study discusses how a glulam roof structure provided decay resistance, seismic performance and cost savings for a municipal water reservoir in California.

Laboratory Tests Evaluate Design Values of Thermo-Ply® Red Product Advisory - SP-1172 This product advisory contains results of testing to measure the shear wall performance of Thermo-Ply® sheathing

Recommended Uniform Live Loads for PS 1 APA 303 Siding 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.

UL Class 90 (NM519) Typical Details - DT-WWR-1 This detail shows a UL Class 90 rated roof assembly using two-ply asphalt glass fiber mat over plywood deck with Douglas-fir or Southern pine framing.

**Please note this image may have been edited or manipulated to enhance visually**

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.

Raised-Heel Trusses for Efficient, Cost-Effective, Comfortable Homes 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

FM Class 1-135 Typical Details - DT-EWG-19 This detail shows an FM Class 1-135 rated flat roof assembly using wood structural panels.

Plywood Design Specification, Supplement 1-23: Design and Fabrication of Plywood Curved Panels 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.

Engineered Wood Construction Guide: Wall Construction 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.

Performance Standards and Qualification Policy for Wood Structural Panels Standards - E445 This publication describes requirements and test methods for APA Performance Rated Panels (APA Rated Sturd-I-Floor®, APA Rated Sheathing and APA Rated Siding).

Wood Structural Panel Overlap Typical Details - DT-AF-18 This detail shows proper wood structural panel sheathing overlap connections for two raised-heel truss configurations.

Diaphragms and Shear Walls Design and Construction Guide Technical Guides - L350 This publication provides design and construction recommendations for engineered diaphragm systems in floor, shear wall and roof systems

Beveled SIP Wall Typical Details - DT-SIP-1 This detail shows a SIP wall beveled to support a sloped SIP roof that are connected together with panel screws and nails. It also shows sealant, roofing material and cladding.

Brick Counter Flashing Details Typical Details - DT-BB-2 This detail shows chimney counter flashing detail of base flashing over shingle underlayment and roof deck, with counter flashing embedded in brick mortar joint.

FM Class 1-105 Typical Details - DT-EWG-17 This detail shows an FM Class 1-105 rated flat roof assembly using wood structural panels over open-web trusses.

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.

Glulam in Residential Building Construction Guide 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.

Wind Resistance of Wood Structural Panel Sheathed Walls 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)

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.

APA Performance-Rated Wood Structural Panels as Thermal Barriers for Foam Plastics 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

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