PRODUCT GUIDE - Pacific Wood Laminate

1 THE ENGINEEREDWOOD ASSOCIATIONAPAHDO/MDO PLYWOODPRODUCT GUIDEB360-M for pdf 9/13/02 2:30 PM Page 1 Wood is the right choice for a host of construction applications. It is theearth s natural, energy efficient and renewable building wood is a better use of uses less wood to make morewood products. That s why using APA trademarked I-joists, glued laminatedtimbers, laminated veneer lumber, plywood and oriented strand board is constructive .. for the environment, for innovative design, and for strong, durable few facts about wood. We re not running out of of the United States land base 731 million acres is covered by forests. About two-thirds of that 731million acres is suitable for repeated planting and har vesting of timber.

2 Butonly about half of the land suitable for growing timber is open to of that harvestable acreage also is open to other uses, such ascamping, hiking, and hunting. Forests fully cover one-half of Canada s land mass. Of thisforestland, nearly half is considered productive, or capable of producing timber on asustained yield basis. Canada has the highest per capita accumulation of protected naturalareas in the world areas including national and provincial parks. We re growing more wood every landowners plant more than two billion trees every year. In addition, millions of trees seednaturally. The forest products industry, which comprises about 15 percentof forestland ownership, is responsible for 41 percent of replanted forestacreage.

3 That works out to more than one billion trees a year, or aboutthree million trees planted every day. This high rate of replanting accounts for the fact thateach year, 27 percent more timber is grown than is harvested. Canada s replanting recordshows a fourfold increase in the number of trees planted between 1975 and 1990. Manufacturing wood is energy products made up 47 percent of allindustrial raw materials manufactured in theUnited States, yet consumed only 4 percentof the energy needed to manufacture allindustrial raw materials, according toa 1987 study. Constructive news for a healthy every ton of wood grown, a young forest produces tons of oxygen and absorbs tons ofcarbon It s the constructive choice for the :The recommendations inthis GUIDE apply only topanels that bear the APAtrademark.

4 Only panelsbearing the APA trademarkare subject to theAssociation s qualityauditing SHEATHINGEXPOSURE 1 SIZED FOR SPACING32/16 15/32 INCH000PS 1-95 C-D PRP-108 THE ENGINEEREDWOOD ASSOCIATIONAPA 2002 APA THE ENGINEERED WOOD ASSOCIATION ALL RIGHTS RESERVED. ANY COPYING, MODIFICATION, DISTRIBUTION OR OTHER USE OF THIS PUBLICATION OTHER THAN AS EXPRESSLY AUTHORIZED BY APA IS PROHIBITED BY THE COPYRIGHT ConstructiveWOODP ercent ofPercent ofMaterialProductionEnergy UseWood474 Steel2348 Aluminum28B360-M for pdf 9/13/02 2:30 PM Page 2 CONTENTSP roduct Description .. 4 Applications ..5 Properties and Characteristics.

5 7 Woodworking Techniques ..9 Specifications ..10 About APA ..11emanding applications such asconcrete forming, exterior siding, andindustrial containers require toughbuilding materials. APA trademarkedHigh and Medium Density Overlay plywood(HDO and MDO) combine the toughness ofExterior-type plywood with the superiorwear of an overlaid surface. These featuresplace HDO and MDO among the mostdurable construction materials on the market publication from APA TheEngineered Wood Association describes the properties of HDO and MDO plywoodand the applications where these panels are used. It also includes finishing recom-mendations and sample for pdf 9/13/02 2:30 PM Page 3 TYPICAL TRADEMARKSPRODUCTDESCRIPTIONHDO plywood is manufactured with athermosetting resin-impregnated fibersurface bonded to both sides under heatand pressure.

6 It s the more rugged ofthe overlaid panels and ideal for suchpunishing applications as concreteforming and industrial tanks. HDObrings to the job all the proven advan-tages of plywood s large size, highstrength, light weight, dimensionalstability and rack resistance. The toughresin overlay withstands severe exposurewithout further finishing. It also resistsabrasion, moisture penetration anddeterioration from many commonchemicals and required by Voluntary ProductStandard PS 1, the minimum HDOoverlay thickness before pressing inch. The overlay weight is notless than 60 pounds per 1,000 squarefeet of panel surface. HDO plywood isbonded with 100 percent waterproofglue and has inner ply construction ofC- or C-Plugged grade veneer.

7 Faceveneers are B-grade or usually comes in a natural, semi-opaque color. The overlay gives a softwood tone appearance to the panelsurface. Other colors, such as black,brown, or olive drab, are also plywood is produced with a resin-treated fiber overlay with just the righttooth for rapid, even paint s a preferred panel, therefore, forstructural siding, exterior color accentpanels, soffits and other applicationswhere long-lasting paint or coatingperformance is And both are produced inall standard sizes and thicknesses. Extra-long panels, including 9- and 10-footsiding panels, can be special orderedfrom some member mills of APA TheEngineered Wood HDO is best suited for someapplications and MDO for others, eitherpanel may be used for a broad range ofjobs.

8 Truck and trailer linings, paintedsigns, highway signs, storage bins,factory work surfaces and farm buildingsare just a few uses for which either HDOor MDO offers high performance andlow maintenance. Other applications areoutlined on the following HDO, Medium Density Overlayplywood is an Exterior-type panel manu-factured only with 100 percent water-proof adhesive. Regular MDO isproduced with B-grade face and backveneers and C-grade inner plies. Panelswith B-grade veneers throughout orC-grade backs for siding can also MDO overlay surface may be speci-fied on the face only or on both the faceand back. The overlay is smooth andgenerally opaque, although it may showsome evidence of the underlying woodgrain.

9 Siding panels with a texture-embossed surface and grooved panelswith either smooth or textured overlaysare also available. Most manufacturersproduce MDO with a wood-tone surfacecolor, although some supply their ownidentifying brand colors. Some also offerfactory-primed and textured MDO,particularly for painted signs and resi-dential siding HDO and MDO are easy to workusing ordinary shop and carpentrytools. The overlays provide high resis-tance to edge splitting and are tightly bonded and overlayseparation is not a problem even athigh machine speeds. Both panels canbe produced with non-skid can be pressure-treated with4 COMMON USES OF APA OVERLAID PANELSP ainted SignsConcrete FormingSidingSoffits and FasciasCabinets and Built-insIndustrial Tanks and VatsCounter TopsTruck and Trailer LiningsHighway SignsAgricultural BinsM.

10 D. OVERLAYONE SIDEB-CEXTERIORGROUP 1000PS 1-95 THE ENGINEEREDWOOD ASSOCIATIONAPAHDO A-A G-1 EXT-APA 000 PS 1-95B360-M for pdf 9/13/02 2:30 PM Page 45 HDO also performs excellently whenused for pallet decks, storage lockersand trunks, counter tops, drying racks,foundry pattern mounts, freezer lockers,humidity chambers and other controlledatmospheres. Although not as rugged asHDO, MDO plywood is widely used inindustry as well. Common applicationsinclude factory work surfaces , storagebins, signage, freezer liners, patterns and FormingFrom giant gang forms and complexshapes to simple conventional formcomponents, HDO PLYFORM is thebest concrete form material available forexceptionally smooth surfaces and maxi-mum reuse.