1、Designation:D5456211Standard Specification forEvaluation of Structural Composite Lumber Products1This standard is issued under the fixed designation D5456;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A nu
2、mber in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEEq X5.1 was corrected editorially in June 2021.INTRODUCTIONStructural composite lumber is intended for use as an engineering material for a variety
3、 of end-useapplications.The composition of the lumber varies by wood species,adhesive composition,woodelement size,shape,and arrangement.To provide the intended performance,composite lumberproducts require:(1)an evaluation of the mechanical and physical properties and their response toend-use enviro
4、nments,and(2)establishment of and conformance to standard performance specifica-tions for quality.Procedures contained in this specification are also to be used for establishing the design propertiesand for checking the effectiveness of property assignment and quality assurance procedures.The qualit
5、y assurance sections in this specification are intended to serve as a basis for designingquality-control programs specific to each product.The objective is to ensure that design valuesestablished in the qualification process are maintained.This specification is arranged as follows:SectionQualificati
6、on6Determination of Allowable DesignStresses7Independent Inspection8Quality Assurance101.Scope1.1 This specification recognizes the complexity of struc-tural glued products.Consequently,this specification coversboth specific procedures and statements of intent that samplingand analysis must relate t
7、o the specific product.1.2 This specification was developed in the light of cur-rently manufactured products as defined in 3.2.Materials thatdo not conform to the definitions are beyond the scope of thisspecification.A brief discussion is found in Appendix X2.1.3 Details of manufacturing procedures
8、are beyond thescope of this specification.NOTE1There is some potential for manufacturing variables to affectthe properties of members that are loaded for sustained periods of time.Users of this specification are advised to consider the commentary on thistopic in Appendix X2.1.4 This specification pr
9、imarily considers end use in dryservice conditions defined in the governing code-referenceddesign standards,such as in most covered structures.Theconditioning environment of 6.3 is considered representative ofsuch uses.1.5 The performance of structural composite lumber isaffected by wood species,woo
10、d element size and shape,andadhesive and production parameters.Therefore,products pro-duced by each individual manufacturer shall be evaluated todetermine their product properties,regardless of the similarityin characteristics to products produced by other manufacturers.Where a manufacturer produces
11、 product in more than onefacility,each production facility shall be evaluated indepen-dently.For additional production facilities,any revisions to thefull qualification program in accordance with this specificationshall be approved by the independent qualifying agency.1.6 This specification is inten
12、ded to provide manufacturers,regulatory agencies,and end users with a means to evaluate acomposite lumber product intended for use as a structuralmaterial.1This specification is under the jurisdiction of ASTM Committee D07 on Woodand is the direct responsibility of Subcommittee D07.02 on Lumber and
13、EngineeredWood Products.Current edition approved Feb.1,2021.Published March 2021.Originallyapproved in 1993.Last previous edition approved in 2019 as D5456 191.DOI:10.1520/D5456-21E01.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis int
14、ernational 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)Comm
15、ittee.11.7 This specification covers initial qualification sampling,mechanical and physical tests,analysis,and design valueassignments.Requirements for a quality-control program andcumulative evaluations are included to ensure maintenance ofallowable design values for the product.1.8 This specificat
16、ion,or parts thereof,shall be applicable tostructural composite lumber portions of manufactured struc-tural components.1.9 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.1.10 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 establi
