ASTM_D_3737_-_18e1.pdf

Designation:D3737181Standard Practice forEstablishing Allowable Properties for Structural GluedLaminated Timber(Glulam)1This standard is issued under the fixed designation D3737;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.1NOTECorrected editorially in September 2018.1.Scope1.1 This practice covers the procedures for establishingallowable properties for structural glued laminated timber.Included are the allowable stresses for bending,tension andcompression parallel to the grain,horizontal shear,compres-sion perpendicular to the grain,and radial tension and com-pression in curved members.Also included are modulus ofelasticity and modulus of rigidity.1.2 This practice is limited to the calculation of allowableproperties subject to the given procedures for the selection andarrangement of grades of lumber of the species considered.1.3 Requirements for production,inspection and certifica-tion are not included,but in order to justify the allowableproperties developed using procedures in this practice,manu-facturers must conform to recognized manufacturing standards.Refer to ANSI A190.1 and CSA O122.1.4 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-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 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 LumberD2395 Test Methods for Density and Specific Gravity(Rela-tive Density)of Wood and Wood-Based MaterialsD2555 Practice for Establishing Clear Wood Strength ValuesD2915 Practice for Sampling and Data-Analysis for Struc-tural Wood and Wood-Based ProductsD4761 Test Methods for Mechanical Properties of Lumberand Wood-Base Structural MaterialD5456 Specification for Evaluation of Structural CompositeLumber ProductsD6570 Practice for Assigning Allowable Properties for Me-chanically Graded LumberE105 Practice for Probability Sampling of Materials2.2 Other Standards:ANSI A190.1 Structural Glued Laminated Timber3ANSI/AWC National Design Specification for Wood Con-struction4CSA O122 Structural Glued Laminated Timber53.Terminology3.1 Definitions:3.1.1 alternative lumberlaminated veneer lumber(LVL),laminated strand lumber(LSL),oriented strand lumber(OSL),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 April 1,2018.Published May 2018.Originallyapproved in 1978.Last previous edition approved in 2012 as D3737 12.DOI:10.1520/D3737-18.2For 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 APA The Engineered Wood Association,Tacoma,WA 98466,http:/www.apawood.org.4Available fromAmerican Wood Council(AWC),222 Catoctin Circle,SE,Suite201,Leesburg,VA 20175,http:/www.awc.org.5Available from Canadian Standards Association(CSA),5060 Spectrum Way,Mississauga,ON L4W 5N6,Canada,http:/www.csa.ca.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United 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 Barriers to Trade(TBT)Committee.1 or parallel strand lumber(PSL)meeting the requirements ofSpecification D5456;or solid-sawn lumber that is producedaccording to Practice D6570 and the grading rules of theapplicable grading or inspection agency.3.1.2 E-rated lumberlumber graded for use in manufac-turing structural glued laminated timber by nondestructivemeasurement of a modul