ASTM_D_3501_-_05a_2011.pdf

Designation:D350105a(Reapproved 2011)Standard Test Methods forWood-Based Structural Panels in Compression1This standard is issued under the fixed designation D3501;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 These test methods cover the determination of thecompression properties of wood-based structural panels.Wood-based structural panels in use include plywood,waferboard,oriented strand board,and composites of veneerand of wood-based layers.1.2 Method A,Compression Test for Small SpecimensThismethod is applicable to small specimens that are uniform withrespect to elastic and strength properties.Two types of com-pression tests are employed:one to evaluate both elastic andcompressive strength properties,and the second to evaluatemaximum compressive strength only.1.3 Method B,Compression Test for Large SpecimensThismethod employs large specimens and responds well to manu-facturing variables and growth characteristics that influencecompression properties of structural panels.1.3.1 This method is intended for the following:1.3.1.1 Comparative tests of structural panels,1.3.1.2 Evaluating the effects of moisture content onstrength properties of structural panels,1.3.1.3 Determining the strength properties of structuralpanels,and1.3.1.4 Evaluating the effects of raw material and manufac-turing variables on compression properties of structural panels.1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D2395 Test Methods for Density and Specific Gravity(Rela-tive Density)of Wood and Wood-Based MaterialsD4442 Test Methods for Direct Moisture Content Measure-ment of Wood and Wood-Based Materials3.Significance and Use3.1 These methods determine the compressive strength ofstructural panels in response to stresses acting in the plane ofthe panel.3.2 Method AThis method is applicable to structuralpanels of uniform properties within a panel.It is useful forevaluating plywood of clear,straight-grained veneers,anddetermining the effect of chemical or preservative treatments,construction,principal direction with respect to direction ofstress,and other variables that are expected to uniformlyinfluence the panel.3.3 Method B:3.3.1 The compressive properties obtained by this methodare a reliable approximation of the strength of a full-size panel,and are intended for use in design.3.3.2 The compressive properties are influenced by buck-ling;however,this effect can be eliminated in this test byrestraining the edges of the specimens.3.4 It is recommended that where comparisons are to bemade,that the same method and specimen size be usedthroughout.This is because the volume of material included ina test specimen can influence the compressive strength regard-less of whether the material properties are uniform throughoutthe sheet or vary widely due to the presence of growth ormanufacturing features.4.Control of Moisture Content4.1 Condition structural panel samples to be tested at aspecific moisture content or relative humidity to approximate1These test methods are under the jurisdiction of ASTM Committee D07 onWood and are the direct responsibility of Subcommittee D07.03 on Panel Products.Current edition approved Nov.1,2011.Published November 2011.Originallyapproved in 1976.Last previous edition approved in 2000 as D3501 05a.DOI:10.1520/D3501-05aR11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 constant weight in controlled atmospheric conditions beforetesting.For panels used under dry conditions,a relativehumidity of 65 6 2%at a temperature of 68 6 6F(20 6 3C)is preferred.5.Variables Influencing the Compressive Properties ofStructural Panels5.1 Moisture ContentCut a moisture content sample hav-ing minimum area of 2 in.2(13 cm2)from the clear areas of thespecimen and weigh immediately after each test.Moisturecontent samples from large specimens of Method B shall haveminimum area of 8 in.2(52 cm2).If inspection of the edges of