2001 ASD Supplements - unprotected PDF - American Wood Council

ASD WOOD STRUCTURAL PANELS SUPPLEMENTSP-276.3 Panel Edge SupportFor certain span ratings, the maximum recommendedroof span for sheathing panels is dependent upon panel edgesupport. Although edge support may be provided by lumberblocking, panel clips are typically used when edgesupport is required. Table 6.2 summarizes the relationshipbetween panel edge support and maximum recommendedspans.Table 6.2aPanel Edge SupportMaximum Recommended Span (in.)Sheathing With WithoutSpan Rating Edge Support Edge Support24/0 24 20 a24/16 24 2432/16 32 2840/20 40 3248/24 48 3620 in. for 3/8-in. and 7/16-in. panels, 24 in. for 15/32-in. and 1/2-in.panels.6.4 Panel Specification6GeneralWood structural panel recommendations provided inthis design supplement are applicable to panels producedin accordance with one or more of the standards listed inSection 2.1 and which bear the trademark of a qualifiedinspection and testing agency. Design recommendationsare based on structural capacities associated with specificpanel classifications. Wood structural panels are classifiedby span ratings.Designers must specify wood structural panels by thespan ratings, nominal thicknesses, grades, and constructionsassociated with tabulated design recommendations.Exposure durability classification must also be identified.Single Floor panels may have tongue-and-groove orsquare edges. If square edge Single Floor panels are specified,the specification shall require lumber blockingbetween supports.Further information regarding specification of woodstructural panels is provided in the following references.References — Wood StructuralPanelsA partial listing of references for further informationon wood structural panels and panel applications follows.Additional information is available from organizationsproviding trademarking and quality assurance services.APA - The Engineered Wood Association7011 South 19th StreetP.O. Box 11700Tacoma, Washington 98411-0700Phone: 253-565-6600Fax: 253-565-7265Internet Address: www.apawood.orgProfessional Services Industries, Inc.Pittsburgh Testing Laboratory Division2710 West 5th Ave.Eugene, OR 97402Phone: 541-484-9212Fax: 541-344-2735Internet Address: www.psiusa.comTECO2402 Daniels St.Madison, WI 53718Phone: 608-221-3361Fax: 608-226-0885Internet Address: www.tecotested.comPublicationsThe following publications provide information onwood structural panels and panel applications:• Performance Standards and Policies for Wood StructuralPanels, APA PRP-108 and TECO PRP-133• Voluntary Product Standard PS 1 — Construction andIndustrial PlywoodOTHER CONSIDERATIONSAPA – The Engineered Wood Association