performance rated panels

P R O D U C T G U I D E

A P AThe Eng ine e r ed Wood As so c i a t i on

P E R F O R M A N C ER A T E D P A N E L S

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Wood is good. It is the earth’s natural, energy efficient and renewable building material.

Engineered wood is a better use of wood. It uses less wood to make more wood products.

That’s why using APA trademarked I-joists, glued laminated timbers, laminated veneer lumber, plywood and oriented strand board is the right thing to do.

A few facts about wood.■ We’re not running out of trees. One-third of the United States land base –731 million acres – is covered by forests. About two-thirds of that 731 million acres issuitable for repeated planting and harvesting of timber. But only about half of the landsuitable for growing timber is open to logging. Most of that harvestable acreage also isopen to other uses, such as camping, hiking, hunting, etc.

■ We’re growing more wood every day. American landowners plant more thantwo billion trees every year. In addition, millions of trees seed naturally. The forestproducts industry, which comprises about 15 percent of forestland ownership, isresponsible for 41 percent of replanted forest acreage. That works out to more than onebillion trees a year, or about three million trees planted every day. This high rate ofreplanting accounts for the fact that each year, 27 percent more timber is grown than is harvested.

■ Manufacturing wood is energyefficient. Wood products made up47 percent of all industrial raw materialsmanufactured in the United States, yetconsumed only 4 percent of the energyneeded to manufacture all industrial rawmaterials, according to a 1987 study.

■ Good news for a healthy planet. For every ton of wood grown, a young forestproduces 1.07 tons of oxygen and absorbs 1.47 tons of carbon dioxide.

Wood. It’s the right product for the environment.

D O T H E R I G H T T H I N G R I G H T ™


Percent of Percent ofMaterial Production Energy Use

Wood 47 4

Steel 23 48

Aluminum 2 8

NOTICE:The recommendations inthis guide apply only topanels that bear the APAtrademark. Only panelsbearing the APA trademarkare subject to theAssociation’s qualityauditing program.

RATED SHEATHING

EXPOSURE 1SIZED FOR SPACING32/16 15/32 INCH

000PS 1-95 C-D PRP-108

THE ENGINEERED

WOOD ASSOCIATIONAPA

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CONTENTS

Performance Standards: Definitions and History . . . . . . . .4

The Performance Standard Advantage . . . . . . . . .4

APA Performance Rated Panel Compositions . . . . . . . . . .5

Performance Rated Panels forFloors, Walls, and Roofs . . . . . . .6

Performance Testing . . . . . . . . . .7

Span Ratings . . . . . . . . . . . . . . .8

Engineered Applications . . . . . . .9

Panel Size and Spacing . . . . . . . .9

Code Recognition . . . . . . . . . . .10

Orders and Specifications . . . . .10

Storage and Handling . . . . . . .10

Summary . . . . . . . . . . . . . . . . .11

APA: The Mark of Quality . . . . .11

PA Performance Rated Panels are structural

wood panels that conform to performance-

based standards. Most APA-trademarked

Oriented Strand Board (OSB) and composite

panels, as well as many grades of plywood panels,

are performance-rated.

The performance-based standards for these panels

provide product performance baselines, such as

load-carrying capacity, for designated end uses. The

primary end uses are sheathing, flooring and siding.

Performance standards differ from typical pre-

scriptive manufacturing standards by defining how

a product must perform in one of these designated

applications rather than how it must be made.

This brochure from APA – The Engineered Wood

Association describes performance standards for

structural wood panels and the compositions of

different types of APA panels that bear the

Performance Rated designations of APA RATED

SHEATHING, APA RATED STURD-I-FLOOR,

and APA RATED SIDING. It also describes the

typical applications where Performance Rated

Panels are used.

A

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4

PERFORMANCE

STANDARDS:

DEFINITIONS

AND HISTORY

A performance standard sets require-ments based on a panel’s end use whilea prescriptive standard defines minimummanufacturing requirements. The objec-tive of a performance standard is toprovide flexibility in manufacturing whileassuring that a product will satisfy therequirements of the intended end use.

The wood products industry is by nomeans the first to use performancestandards and testing. The electronics,automotive, and aircraft industries alluse performance standards for a varietyof parts and products.

Why Performance Standards?APA Performance Standards were bornout of necessity – answering changes inwood resources, manufacturing, andconstruction trends.

In the early days of plywood manufac-ture, every mill worked with the samespecies and technology. Manufacturingtechniques didn’t vary much from millto mill. APA’s quality assurance programwas geared toward this uniformity inmanufacturing. To produce panelsunder APA’s prescriptive standards, a member mill used wood of a certainspecies, peeled it to veneer of a prescribed thickness, then glued theveneers together in a prescribed manner using the approved adhesives.

Keeping In Step With Technology and ResourcesAs technology changed, mills startedusing a broader range of species anddifferent manufacturing techniques. Bythe mid-1960s, APA was maintainingand cross-referencing three major prod-uct standards and several minor ones.

With the development of ProductStandard PS 1-66, the three standardswere combined into one. And, for thefirst time, Span Ratings were incorpo-rated in the standard. The Span Ratingconcept would later be used as a basisfor the development of APAPerformance Standards.

Maximizing the ResourceAt the same time, there was growingconcern over efficient use of forestresources. Working in cooperation withthe U.S. Forest Service, APA testedpanels manufactured with a core ofcompressed wood strands and tradi-tional wood veneer on the face andback for use in structural applications.By using cores of wood strands, manu-facturers were able to make more effi-cient use of the wood resource and usea broader range of species. Today, thesepanels are called composite panels orCOM-PLY®.

In the course of the research on com-posite panels, performance standardswere developed that led to APA’ssystem of Performance Rated Panels.Soon, manufacturers were making struc-tural panels composed entirely of woodstrands. Most current production ofthese panels is referred to as orientedstrand board, or OSB.

THE PERFORMANCE

STANDARD ADVANTAGE

Performance standards provide severaladvantages:

■ They provide a common baseline forall panel types. All panels, regardless ofmanufacturing method, must meet thesame minimum performance criteria toreceive a Span Rating.

■ Panel producers have more freedom touse innovative manufacturing technol-ogy. As long as the finished productmeets performance standards, a varietyof species and manufacturing methodsmay be used.

■ More efficient use of resources isencouraged. Innovative manufacturingtechniques use greater percentages ofeach log, and allow for the utilization ofa wide range of species.

■ Because performance standards aredirected toward the end use, builders,engineers, and architects are assuredthat the panel satisfies the requirementsof the job at hand.

Throughout decades of product andstandard development, one fact hasremained unchanged: the APA trade-mark on a wood structural panel signi-fies that the manufacturer subscribes torecognized, industrywide standards andAPA’s rigorous quality auditing program.The APA trademark is still the premiermark of quality.

RATED SHEATHING

EXPOSURE 1SIZED FOR SPACING

32/16 15/32 INCH

000PRP-108 HUD-UM-40

THE ENGINEEREDWOOD ASSOCIATION

APA

RATED SIDING

SIZED FOR SPACINGEXTERIOR

24 oc 15/32 INCH


APA


RATED STURD-I-FLOOR

EXPOSURE 1

24 oc 23/32 INCH



APA

SIZED FOR SPACINGT&G NET WIDTH 47-1/2

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5

APA PERFORMANCE

RATED PANEL

COMPOSITIONS

PlywoodPlywood is the original structural woodpanel. It is composed of thin sheets ofveneer, or plies, arranged in layers to forma panel. Plywood may have an evennumber of plies, but it always has an oddnumber of layers, each layer consisting ofone or more plies, or veneers.

In plywood manufacture, a log is turnedon a lathe and a long knife blade peelsthe veneer. The veneers are clipped to asuitable width, dried, graded, andrepaired if necessary. Next the veneers arelaid up in cross-laminated layers. Some-times a layer will consist of two or moreplies with the grain running in the samedirection, but there will always be an oddnumber of layers, with the face layerstypically having the grain oriented parallelto the long dimension of the panel.

Adhesive is applied to the veneers whichare to be laid up. Laid-up veneers arethen put in a hot press where they arebonded to form panels.

Wood is strongest along its grain, andshrinks and swells most across the grain.

By alternating grain direction betweenadjacent layers, strength and stiffness in both directions are maximized, andshrinking and swelling are minimized in each direction.

Oriented Strand BoardPanels manufactured of compressedwood strands or wafers have been mar-keted with such names as waferboardand oriented strand board. Today, all

APA nonveneer wood structural panelsare manufactured with oriented strandsor wafers, and are commonly calledoriented strand board (OSB).

OSB is composed of compressedstrands arranged in layers (usually threeto five) oriented at right angles to oneanother. The orientation of layersachieves the same advantages of cross-laminated veneers in plywood. Sincewood is stronger along the grain, thecross-lamination distributes wood’snatural strength in both directions ofthe panel. Whether a panel is composedof strands or wafers, all APA manufactur-ers orient the material to achieve maxi-mum performance.

Most OSB sheathing panels have a non-skid surface on one side for safety onthe construction site.

COM-PLY®

COM-PLY is an APA product name forcomposite panels that are manufacturedby bonding layers of wood fibers betweenwood veneer. By combining wood fiberswith conventional veneer, COM-PLYpanels allow for more efficient resourceuse while retaining the wood grainappearance on the panel face and back.

COM-PLY panels are manufactured in athree- or five-layer arrangement. A three-layer panel has a wood fiber core and aveneer face and back. The five-layerpanel has a wood veneer crossband inthe center and veneer on the face andback. When manufactured in a one-steppressing operation, voids in the veneersare filled automatically by the particlesor strands as the panel is pressed in thebonding process.

PLYWOOD

ORIENTED STRAND BOARD

COM-PLY®

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6

PERFORMANCE RATED

PANELS FOR FLOORS,

WALLS, AND ROOFS

APA Performance Rated Panels are ratedfor three end uses: single-layer flooring,exterior siding, and sheathing for roofs,floors and walls. The categories are furtherbroken down into exposure durabilityclassifications (resistance to moistureexposure), and an additional sheathingcategory (Structural I) denoting additionalstrength in the cross-panel direction andin racking.

In order to qualify for a particular enduse, panels must be submitted for test-ing and meet performance criteria inthree critical areas: structural perfor-mance, physical properties and gluebond durability.

Panels are typically classified in one oftwo exposure durability classifications:

■ Exterior panels have a fully waterproofbond and are designed for applicationssubject to permanent exposure to theweather or to moisture.

■ Exposure 1 panels have a fully water-proof bond and are designed for appli-cations where long construction delaysmay be expected prior to providingprotection. Approximately 95 percent of Performance Rated Panels are manu-factured with this designation.

APA Rated Sheathing is rated for use assubfloor, wall or roof sheathing. It isused in a myriad of construction andmiscellaneous applications wherestrength and stiffness are required. Foroutdoor use, be sure to select panelswith an Exterior exposure classification.

Rated Sheathing is also available asAPA Rated Sheathing/Ceiling Deck,where one surface has an overlay, texturing or grooving.

Common thicknesses for sheathingpanels are 5/16, 3/8, 7/16, 15/32, 1/2,19/32, 5/8, 23/32, and 3/4 inch.

■ Structural I is a designation applied toAPA Rated Sheathing where enhancedracking and cross-panel strength proper-ties are of maximum importance.Structural I panels are typically used indemanding applications such as struc-tural diaphragms and panelized roofs.

■ APA Rated Wall Bracing is intendedfor wall sheathing applications whereonly conventional bracing is required.Such panels often have other attributesof interest to the specifier, such as special fire resistance.

APA Rated Sturd-I-Floor is a combinedsubfloor/underlayment single-layerflooring for use under carpet and pad. Itcan be used in place of separate subfloorand underlayment layers. The panelsurface has extra resistance to punch-through damage. Panels are availablewith square or tongue-and-groove(T&G) edges.

T&G panels are typically 47-1/2 incheswide; check with local suppliers. Whereresilient flooring such as vinyl will beused, an additional layer of thin, sandedunderlayment is recommended. APARated Sturd-I-Floor is available in both

Exterior and Exposure 1 in thicknessesof 19/32, 5/8, 23/32, 3/4, 7/8, 1,and 1-1/8 inch.

APA Rated Siding is available as bothpanel and lap siding. Panel siding maybe applied over sheathing or directlyover studs in Sturd-I-Wall (single wall)application. APA panel siding is availablein a variety of surface textures and pat-terns, including Texture 1-11, roughsawn, reverse board and batten, channelgroove, and brushed. Panels are avail-able in 4 x 8, 4 x 9, and 4 x 10-footdimensions.

Lap siding is available in lengths of up to 16 feet and widths of up to12 inches.

APA Rated Siding is manufactured inthicknesses of 11/32, 3/8, 7/16, 15/32,1/2, 19/32, and 5/8 inch.

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7

PERFORMANCE

TESTING

Field data and laboratory testing wereused to develop the APA PerformanceStandards for APA Performance RatedPanels. Once a mill’s panels have quali-fied for the Performance Rated Paneltrademark, APA’s quality auditors checkthe mill’s quality-control program byselecting panels at random for tests.Specified quality-assurance tests are rundaily, weekly and quarterly.

There are three basic criteria for qualify-ing wood-based panel products underAPA performance standards: structuraladequacy, dimensional stability andbond durability. Wood-based productsqualifying as APA Rated Siding are alsoevaluated for surface characteristics,including ability to accept differentkinds of finishes.

Performance criteria in each of thesecategories were established by buildingcode requirements and through tests ofpanel products with known acceptancein the marketplace. The tests evaluated a panel’s ability to perform to theexpected and necessary level for theend-use application or market.

Not all performance tests apply to allpanels and their applications, but apartial list of typical tests includes:

■ Linear expansion. Measurements aretaken between brass eyelets installed inthe panel to test dimensional changedue to moisture.

■ Racking. A wall section of dimensionlumber and structural panels is builtand tested. A hydraulic jack applieslateral force to one corner, and deflec-tion and ultimate load on the wall are measured.

■ Uniform load. A panel is applied tojoists. The unit is sealed to permit avacuum to be drawn beneath the panel.

Atmospheric pressure then provides auniform load. Deflection at a specifiedload is measured. A proof load forstrength is also applied.

■ Concentrated static load (APA RatedSturd-I-Floor and Sheathing). Load isapplied through a one- or three-inchdiameter disc mid-span between joistsat a panel edge. Deflection and ultimateload are measured.

■ Concentrated static load (APA RatedSiding). The end of a one-inch diameterrod is pushed into the panel, and theindentation measured.

■ Impact resistance. A bag of steel shotweighing 30 or 60 pounds, dependingon span, is dropped on the panel mid-span between joists, to determineimpact load performance.

■ Hard-body impact loads (APA RatedSiding). A steel ball is dropped on thepanel from several feet, and the inden-tation measured to determine surfacetoughness.

■ Direct fastener withdrawal. Nails aredriven into the panel, then the forceneeded to pull them out is measured.

■ Lateral fastener strength. A nail isdriven through the panel, and througha hole in a steel block behind the panel.Force is then applied to move thepanel laterally.

■ Surface profile (APA Rated Siding).The decorative surface on the exposedsiding face is measured before and aftergoing through moisture cycles to deter-mine stability.

■ Peel test (APA Rated Siding). A strip ofcheese cloth is painted on the decorativesurface of a siding panel. After it dries,the force required to peel it off is mea-sured to test the suitability of the sid-ing’s surface to accept paint and stain.

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8

SPAN RATINGS

The Span Ratings in the trademarks onPerformance Rated Panels denote themaximum recommended center-to-center spacing of supports, in inches,over which the panels should beinstalled.

For APA Rated Sheathing and Sturd-I-Floor, the Span Rating applies when thelong panel dimension is across sup-ports, unless the strength axis is other-wise identified. The Span Rating forAPA Rated Siding panels is for verticalinstallation; for lap siding, the ratingapplies with the long dimension across supports.

For APA Rated Sheathing, the SpanRating looks like a fraction, such as32/16. The left-hand number denotesthe maximum spacing of supports (ininches) when the panel is used for roofsheathing, and the right-hand numberdenotes the maximum spacing of supports when the panel is used forsubflooring.

Sheathing panels with roof Span Ratingsof 24 or greater may be used verticallyor horizontally as wall sheathing overstuds at 24 inches on center (o.c.).Those with roof Span Ratings of lessthan 24 may be used vertically or hori-zontally over studs at 16 inches o.c.

APA Rated Sheathing may also be man-ufactured specifically for use as wallsheathing. These panels are identifiedwith Span Ratings of Wall-16 orWall-24.

Horizontal edges of all wall sheathingmust be blocked when panels are usedas bracing.

APA Rated Sturd-I-Floor panels aredesigned specifically for single-floor(combined subfloor-underlayment)applications under carpet and pad andare manufactured with Span Ratings of16, 20, 24, 32, and 48 oc.

APA Rated Siding is produced withSpan Ratings of 16 and 24 oc. Bothpanels and lap siding may be useddirect to studs or over non-structural

sheathing (Sturd-I-Wall construction) orover nailable panel or lumber sheathing(double wall construction). Veneer-facedAPA Rated Siding panels may be appliedhorizontally over studs 24 inches o.c.,provided horizontal joints are blocked.

Spacing supports precisely at SpanRatings will meet minimum coderequirements. For structures that willexceed minimum code requirements,space supports closer than the recom-mended Span Ratings.

Allowable uniformly distributed liveload at maximum span for APA RatedSturd-I-Floor and APA Rated Sheathingis 100 psf for floors plus 10 psf deadload (65 psf total load for Sturd-I-Floor48 o.c.) and 30 psf for roofs (35 psf forRated Sheathing 48/24 or greater) plus10 psf dead load. Higher live load levelscan be achieved by placing supportscloser than the maximum span indi-cated on the APA Rated Sheathing orSturd-I-Floor trademarks. Refer to APA’sDesign/Construction Guide: Residential &Commercial for these live load levels.

RATED SIDING

SIZED FOR SPACINGEXTERIOR

24 oc 15/32 INCH


APA


RATED STURD-I-FLOOR

EXPOSURE 1

24 oc 23/32 INCH



APA

SIZED FOR SPACINGT&G NET WIDTH 47-1/2

RATED SHEATHING

EXPOSURE 1SIZED FOR SPACING

32/16 15/32 INCH



APA

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9

ENGINEERED

APPLICATIONS

Engineering design capacities for APARated Sheathing and APA Rated Sturd-I-Floor are given in APA TechnicalNote N375.

Some grades of veneered panels aremanufactured under the detailed manu-facturing specifications or under theperformance testing provisions ofVoluntary Product Standard PS 1-95 forConstruction and Industrial Plywood, andVoluntary Product Standard PS 2-92,Performance Standard for Wood-BasedStructural-Use Panels, developed cooper-atively by the structural panel industryand the U.S. Department of Commerce.The PS 1 and PS 2 grade conformance,where applicable, is given in the lowerportion of the APA trademark.

Design stresses and section propertiesfor plywood conforming to PS 1, includ-ing sanded panels, are given in APA’sPlywood Design Specification, Form Y510.Design capacities for performance-ratedAPA Rated Sheathing and APA RatedSturd-I-Floor wood structural panelsconforming with PS 1 and PS 2 aregiven in APA’s Design Capacities of APAPerformance Rated Structural-Use Panels,Technical Note N375.

For specific construction grade andinstallation recommendations, see APA’sDesign/Construction Guide: Residential &Commercial, Form E30.

Industrial use guides on bins, slavepallets and other materials handlingapplications are also available. Requestinformation from APA headquarters, orfrom the nearest regional field officelisted on the back cover, or visit APA’swebsite at www.apawood.org.

PANEL SIZE

AND SPACING

Square-edge Performance Rated Panelsare typically manufactered 48 by96 inches, with a plus 0, minus1/8-inch tolerance. Tongue-and-grooveSturd-I-Floor panels are 48 inches wide,but net width installed is typically47-1/2 inches.

Recommended spacings between panelsare 1/8 inch at end and edge joints,except where otherwise indicated by themanufacturer.

The simple precaution of properly installingthe panels with correct spacing will helpreduce complaints and callbacks, especiallyon roofs.

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10

CODE RECOGNITION

Recognition of panels conforming toPS 1 and PS 2 is contained in each ofthe model building codes.

They are:

■ Building Officials and Code Admin-istrators International (BOCA), promul-gators of the National Building Code.

■ The International Conference ofBuilding Officials (ICBO), promulgatorsof the Uniform Building Code.

■ The Southern Building Code CongressInternational (SBCCI), promulgators ofthe Standard Building Code.

The National Evaluation Service, sponsored jointly by the three agencies,recognizes the APA Performance Standard PRP-108 in report numberNER-108. Recognition of APA as anaccredited quality assurance agency isset forth in report number NER-QA397. As always, both of the reportsare subject to re-examination, revisionsand possible cancellation.

ORDERS AND

SPECIFICATIONS

To order APA Performance Rated Panels,designate the thickness, APA trademark,grade, Span Rating, exposure durabilityclassification, dimensions and numberof pieces. For example:

■ 15/32" APA Rated Sheathing, 32/16,Exposure 1, 48" x 96", 100 pcs.

■ 23/32" APA Rated Sturd-I-Floor,24 o.c., Exposure 1, 48" x 96", 100 pcs.

■ 19/32" APA Rated Siding,303-18-S/W*, 16 o.c. Exterior,48" x 96", 100 pcs.

Standard dimensions for structuralpanels are 48" by 96", but others areavailable. Some mills manufacture ply-wood to 10-foot lengths or longer, andnonveneer panels can be furnished insome parts of the country to lengths of28 feet. Check local availability.

STORAGE AND

HANDLING

Follow these simple guidelines to protectpanels before and during construction:

■ Select high, dry ground for the storage site.

■ Stack panels on a level platform supported with 4 x 4 stringers orother blocking.

■ Lay stringers or boards on top to keepan air space between the panels and thecovering.

■ Keep covering away from sides andbottom, to permit air flow.

■ If panels are to be stored for more thana day or two, cut metal strapping bandsso swelling of panels does not causecompression of edges.

Lay two 2x4s on top of stack.

Pad corners with rags.

Stretch film over stack and secure to tie-down stakes.

Nail film to top panel and drape over ends for protection against driving rain. Weight lower end with 2x4.

Build platform of cull panel and scrap lumber 4x4s for stacking panels.

Stretch plastic film over platform to block passage of ground moisture.

PANEL STORAGE

When handling, avoid dropping panelson edges. Splintered or chipped edgesor corners will not affect the structuralintegrity of the panel, but can add toman-hours required for installation,especially when tongue-and-grooveedges are damaged.

Once installed, protect panels by apply-ing a temporary covering and by enclos-ing the structure and installing finishflooring, siding and roofing as soon aspossible.

* Face grade is one of several that can apply toplywood Rated Siding 303.

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11

SUMMARY

Development of performance standardsbrings four major advantages to manu-facturers, specifiers, architects and usersof structural panels:

■ Performance standards permit more-efficient use of natural resources byexpanding the range of panel compo-sition and configuration. Abundantwood species which do not lend them-selves to use under traditional prescrip-tive standards may now be used instructural panels.

■ Performance standards encouragemanufacturing and product innovation,since manufacturers are freed fromprescriptive requirements. This inno-vation helps assure the future availabilityof adequate supplies of manufacturedwood products at affordable cost.

■ APA performance standards establishbaseline criteria for qualifying new prod-ucts and provide a means for theirrecognition by building codes. Plus,extensive qualification testing and ongo-ing quality auditing assures the user thatthe product will perform in its intendedend use.

■ Finally, performance standards, alongwith descriptive APA panel trademarkssimplify the specification, identificationand use of structural wood panels instrong, safe building construction.

APA: THE MARK OF QUALITY

The APA trademark appears only on products manufactured by APAmember mills and is the manufacturer’s assurance that the productconforms to the standard shown on the trademark. That standard maybe an APA performance standard, the Voluntary Product Standard PS 1-95 for Construction and Industrial Plywood or Voluntary Product StandardPS 2-92, Performance Standard for Wood-Based Structural-Use Panels.

APA’s services go far beyond quality testing and inspection. Researchand promotion programs play important roles in developing andimproving plywood and other panel construction systems, and inhelping users and specifiers to better understand and apply panelproducts.

APA field representatives in most major cities are available to assistwith panel selection and application, and to provide general informa-tion on APA panels. To reach your field representative, call one of theregional offices listed on the back of this brochure.

For additional information on structural wood panel constructionsystems, contact APA – The Engineered Wood Association, P.O. Box11700, Tacoma, Washington 98411-0700. For a complete listing ofavailable literature, request the Publications Index, Form B300.

MORE INFORMATION ONLINE

Visit APA’s website at www.apawood.org for more information on engineered wood products, wood design and construction, and technical issues and answers.

Online publication ordering is also available through the website.

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PERFORMANCE RATED PANELSP R O D U C T G U I D E

We have field representatives in most major U.S. cities and in Canada who can helpanswer questions involving APA trademarked

products. For additional assistance in specifyingAPA engineered wood products, get in touch with

your nearest APA regional office. Call or write:

WESTERN REGION7011 So. 19th St. ■ P.O. Box 11700Tacoma, Washington 98411-0700

(253) 565-6600 ■ Fax: (253) 565-7265

EASTERN REGION2130 Barrett Park Drive, Suite 102Kennesaw, Georgia 30144-3681

(770) 427-9371 ■ Fax: (770) 423-1703

U.S. HEADQUARTERS AND INTERNATIONAL MARKETING DIVISION

7011 So. 19th St. ■ P.O. Box 11700Tacoma, Washington 98411-0700

(253) 565-6600 ■ Fax: (253) 565-7265

PRODUCT SUPPORT HELP DESK(253) 620-7400

E-mail Address: [email protected]

(Offices: Antwerp, Belgium; Bournemouth,United Kingdom; Hamburg, Germany; Mexico City,

Mexico; Tokyo, Japan.) For Caribbean/LatinAmerica, contact headquarters in Tacoma.

The product use recommendations in this publica-tion are based on APA – The Engineered WoodAssociation’s continuing programs of laboratorytesting, product research, and comprehensive fieldexperience. However, because the Association hasno control over quality of workmanship or the con-ditions under which engineered wood products areused, it cannot accept responsibility for productperformance or designs as actually constructed.Because engineered wood product performancerequirements vary geographically, consult yourlocal architect, engineer or design professional toassure compliance with code, construction, andperformance requirements.

Form No. F405L/Revised December 1999/0200

www.apawood.org@Web Address:

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performance rated panels

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