1、Designation:D822319Standard Practice forEvaluation of Fire-Retardant Treated Laminated VeneerLumber1This standard is issued under the fixed designation D8223;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A
2、 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 procedures for the evaluation oflaminated veneer lumber(LVL)pressure-treated with commer-cially available fire retard
3、ants after exposure to both standardenvironmental conditions and an extended exposure to elevatedtemperature.1.2 LVL products utilizing overlays or fire-retardant paintsand coatings require other considerations and are outside of thescope of this practice.1.3 LVL products manufactured for rim board
4、applicationsrequire other considerations and are outside of the scope of thispractice.1.4 This practice provides one method to establish designvalues for fire-retardant treated(FRT)LVL.It is not intended topreclude the use of alternative methods for deriving designvalues,such as Test Method D5664 an
5、d Practice D6841 forFRT lumber.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 regulator
6、y 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 Organiz
7、ation TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D9 Terminology Relating to Wood and Wood-Based Prod-uctsD3201/D3201M Test Method for Hygroscopic Properties ofFire-Retardant Wood and Wood-Based ProductsD5456 Specification for Evaluation of Structural Composite
8、Lumber ProductsD5664 Test Method for Evaluating the Effects of Fire-Retardant Treatments and Elevated Temperatures onStrength Properties of Fire-Retardant Treated LumberD6841 Practice for Calculating Design Value TreatmentAdjustment Factors for Fire-Retardant-Treated LumberE84 Test Method for Surfac
9、e Burning Characteristics ofBuilding MaterialsE2768 Test Method for Extended Duration Surface BurningCharacteristics of Building Materials(30 min Tunnel Test)2.2 Other Standards:ANSI/AWC National Design Specification for Wood Con-struction3AWPA E12 Standard Method for Determining Corrosion ofMetal i
10、n Contact with Treated Wood4UL 723 Test for Surface Burning Characteristics of BuildingMaterials53.Terminology3.1 DefinitionsDefinitions used in this practice are inaccordance with Terminology D9 and Specification D5456.3.2 Definitions of Terms Specific to This Standard:3.2.1 design value adjustment
11、 factor,Ctrfactor used toadjust the design value for FRT LVL that will be exposed toend-use temperatures in excess of 38 C(100 F)but notexceeding 66 C(150 F),depending on the ratio of ftr,108andftr,0,and the climate zone.3.2.2 ftr,0mean property of FRT LVL equilibrated tostandard conditions of 6.3.1
12、.3.2.3 ftr,108mean property of FRT LVL after 108-dayexposure to elevated temperature and relative humidity of6.3.2.1This test method is under the jurisdiction of ASTM Committee D07 on Woodand is the direct responsibility of Subcommittee D07.07 on Fire Performance ofWood.Current edition approved July
13、 1,2019.Published August 2019.DOI:10.1520/D8223-19.2For 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
14、American Wood Council(AWC),222 Catoctin Circle,SE,Suite201,Leesburg,VA 20175,http:/www.awc.org.4Available from American Wood Protection Association(AWPA),P.O.Box361784,Birmingham,AL 35236-1784,http:/.5Available from Underwriters Laboratories(UL),333 Pfingsten Road,Northbrook,IL 60062-2096,https:/.Co
15、pyright 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 Internationa
16、l Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.Summary of Practice4.1 This practice establishes requirements for the evaluationof LVL pressure-treated with commercially available fireretardants.The FRT LVL is considered as a new grade of LVLand evaluated in the same manner as a grade of untreated LVLin accordance with Specification D5456 after exposure toenvironmental conditions specified in 4.2 and 4.3.4.2 The FRT LVL
