1、Designation:D657004(Reapproved 2010)Standard Practice forAssigning Allowable Properties for Mechanically GradedLumber1This standard is issued under the fixed designation D6570;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year
2、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.1.Scope1.1 This practice covers the methodology of grade qualifi-cation,assignment of design properties,and requirements forthe qua
3、lity control of mechanically graded solid sawn lumber.1.2 This practice acknowledges alternative methods for theassignment of specific properties.These methods are assign-ment by test,relationship to other properties,and by proce-dures in other appropriate standards.2.Referenced Documents2.1 ASTM St
4、andards:2D9 Terminology Relating to Wood and Wood-Based Prod-uctsD143 Test Methods for Small Clear Specimens of TimberD198 Test Methods of Static Tests of Lumber in StructuralSizesD245 Practice for Establishing Structural Grades and Re-lated Allowable Properties for Visually Graded LumberD1165 Nomen
5、clature of Commercial Hardwoods and Soft-woodsD1990 Practice for Establishing Allowable Properties forVisually-Graded Dimension Lumber from In-Grade Testsof Full-Size SpecimensD2395 Test Methods for Specific Gravity of Wood andWood-Based MaterialsD2555 Practice for Establishing Clear Wood Strength V
6、aluesD2915 Practice for Sampling and Data-Analysis for Struc-tural Wood and Wood-Based ProductsD3737 Practice for Establishing Allowable Properties forStructural Glued Laminated Timber(Glulam)D4442 Test Methods for Direct Moisture Content Measure-ment of Wood and Wood-Base MaterialsD4444 Test Method
7、 for Laboratory Standardization andCalibration of Hand-Held Moisture MetersD4761 Test Methods for Mechanical Properties of Lumberand Wood-Base Structural Material2.2 ANSI Standards:3ANSI/AITC A190.1 American National Standard for WoodProductsStructural Glued Laminated TimberANSI/AF&PA NDS National D
8、esign Specification for WoodConstruction2.3 Canadian Standards Association Standard:4CSA O141 Softwood Lumber2.4 National Institute of Standards and Technology Stan-dard:5PS 20 Voluntary Product Standard,American SoftwoodLumber Standard3.Terminology3.1 DefinitionsFor definitions of terms related to
9、wood,refer to Terminology D9.3.2 Definitions of Terms Specific to This Standard:3.2.1 mechanical evaluation,nidentification and appraisalof one or more physical or mechanical lumber characteristicsas part of the lumber segregation process.3.2.2 mechanically graded lumber,nsolid sawn lumbergraded by
10、mechanical evaluation.Visual evaluation also maybe required.The material has assigned design properties and ismanufactured for use as structural members.3.2.3 qualified agency,nan organization,hereafter re-ferred to as the agency,that has trained personnel and proce-dures to ensure the system evalua
11、tions and grades comply withall applicable requirements of this practice.3.2.3.1 DiscussionThe agency shall have no financialinterest in,nor shall be financially dependent upon,any singlecompany manufacturing the product being inspected or tested;and shall not be owned,operated,or controlled by any
12、suchcompany.1This practice is under the jurisdiction of ASTM Committee D07 on Wood andis the direct responsibility of Subcommittee D07.02 on Lumber and EngineeredWood Products.Current edition approved May 1,2010.Published June 2010.Originallyapproved in 2000.Last previous edition approved in 2004 as
13、 D6570 041.DOI:10.1520/D6570-04R10.2For 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.3Available from American Nation
14、al Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from Canadian Standards Association(CSA),5060 Spectrum Way,Mississauga,ON L4W 5N6,Canada,http:/www.csa.ca.5Available from National Institute of Standards and Technology(NIST),100Bureau Dr.,Stop 1070,
15、Gaithersburg,MD 20899-1070,http:/www.nist.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.3.2 DiscussionThe agency shall conform with theprovisions for agency accreditation under the appropriateconsensus standard.3.2.4 visual eval
16、uation,nidentification and appraisal oflumber growth and manufacturing characteristics by visualmeans as part of the lumber segregation process.NOTE1In the United States and Canada,criteria for agency accredi-tation are contained in PS 20,ANSI/AITC A190.1,and CSA O141.4.Significance and Use4.1 The procedures described in this practice are intended tobe used to establish appropriate allowable unit stresses,moduliof elasticity,and specific gravity for mechanically graded solidsawn lumber.An on-goi
