It is composed of thin sheets of veneer, or plies, arranged in layers to form a panel. This rating doesn’t mean it has to be used outside. The grade refers to the grade of surface covering. PS 1-09 – APA’s Technical Guide, with APA Typical Trademarks. g. fFor rough floors, specify minimum Performance Category 11/32 APA Underlayment . APA-The Engineered Wood Association is a nonprofit trade association focusing on helping the industry create structural wood products of exceptional strength, versatility and reliability . Plywood may have an even number of plies, but it always has an odd number of layers, each layer consisting of one or more plies, or veneers. h. For other specialty flooring products, including marble and slate, please refer to the finish floor A structural wood panel composed of a D-grade or better face, back and inner plies cross-banded for strength. APA has a technical guide to PS 1-09 structural plywood. Span Rating denotes the maximum recommended centre to centre spacing of supports in inches over which the panel should be placed with its strength axis across two or more supports. Veneer in a finished US trademarked plywood panel must conform to one of the six grades listed in the US PS 1-09 standard: N, the highest classification (rarely produced), followed by A, B, C-plugged, C and D. Non-overlaid APA plywood panels come in three levels of … APA Rated Sheathing, 40/20 Span Rating, 19/32 inch, 4x8. APA Rated® Sheathing An APA Performance Rated Panel designed and manufactured specifically for residential and other light frame wall sheathing, roof sheathing and subfloor-ing applications. aPa Performance rated PaneL comPoSitionS Plywood Plywood is the original wood structural panel. APA trademark. Table 3 applies to sanded grades such as A-D and B-D. According to US Plywood Standard (APA PS1-95 Construction and Industrial Plywood), plywood can be classified into several grades, such as A-A, A-B, A-C, B-B, B-C, C-C , C-D . f. Plywood APA Rated Sturd-I-Floor with sanded face. Plywood Rated Sturd-I-Floor is underlayment with a span rating. The standard details various grades of structural plywood such as sheathing for roofs, walls and floors, sanded grades and plywood used in concrete formwork. through 2c apply to APA Rated OSB Sheathing, APA Rated OSB Structural I Sheathing, and APA Rated OSB Sturd-I-Floor respectively. Plywood may have an even number of plies, but it always has an odd number of layers, each layer consisting of one or more plies, or veneers. THING ACING EXPOSURE 1 32/16 15/32 INCH PS 1-07 C-D PRP-108 000 WOOD ASSOCIA THE ENGINEERED TION APA Percent of Percent of Material Production Energy Use Wood 47 4 Steel 23 48 Aluminum 2 8 ©2007 For touch-sanded grades such as C-D Plugged, C-C Plugged, UNDERLAYMENT and APA RATED STURD-I-FLOOR (marked PS 1), see Table 2. Table 1 applies to unsanded plywood and is based on APA RATED SHEATH-ING (marked PS 1) grade. APA’s PS1-95 is an important standard for Construction and Industrial Plywood . The Exterior rating makes it a great option for use in bathrooms and kitchens, as well. It is composed of thin sheets of veneer, or plies, arranged in layers to form a panel. Brows our selection of plywood and lumber at the Plywood C Span Rating on APA Plywood Panels. APA Underlayment is always plywood. Plywood with an Exterior rating is suitable for outside use with repeated water exposure. The first letter refers to the grade of face veneers and the second letter refers to the grade of back veneers . The final mark on the APA rating is the thickness of the plywood. For sanded plywood panels, see Table 3. Only products bearing the APA trademark are subject to the Association’s quality auditing program. Thickness. The values given in Tables 1 and 2 represent the maximum allowable loads for plywood or OSB. APA PERFORMANCE RATED PANEL COMPOSITIONS Plywood Plywood is the original wood structural panel. The further the supports are spaced, the thicker the panel needs to be.

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