1、Designation:D657018aStandard 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 of last revision
2、.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 gradequalification,assignment of design properties,and require-ments for the quality control of
3、mechanically graded solidsawn 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.1.3 This international standard was developed in a
4、ccor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM
5、 Standards: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 No
6、menclature 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 Density and Specific Gravity(Rela-tive Density)of Wood and Wood-Based MaterialsD2555 Practice for
7、Establishing Clear Wood Strength ValuesD2915 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 Wo
8、od-Based MaterialsD4761 Test Methods for Mechanical Properties of Lumberand Wood-Base Structural MaterialD7438 Practice for Field Calibration and Application ofHand-Held Moisture Meters2.2 ANSI Standards:3ANSI A190.1 American National Standard for WoodProductsStructural Glued Laminated TimberANSI/AW
9、C NDS National Design 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 t
10、erms related to 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
11、lumbergraded by mechanical evaluation.Visual evaluation also maybe required.The material has assigned design properties and ismanufactured for use as structural members.1This practice is under the jurisdiction of ASTM Committee D07 on Wood andis the direct responsibility of Subcommittee D07.02 on Lu
12、mber and EngineeredWood Products.Current edition approved Oct.1,2018.Published October 2018.Originallyapproved in 2000.Last previous edition approved in 2018 as D6570 18.DOI:10.1520/D6570-18A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at servic
13、eastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from Canadian Standards Association(CSA),5
14、060 Spectrum Way,Mississauga,ON L4W 5N6,Canada,http:/www.csa.ca.5Available from National Institute of Standards and Technology(NIST),100Bureau Dr.,Stop 1070,Gaithersburg,MD 20899-1070,http:/www.nist.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.Un
15、ited StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barrier
16、s to Trade(TBT)Committee.1 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 evaluations 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 suchcompany.3.2.3.2 Discus