1、Designation:D566410Standard Test Method forEvaluating the Effects of Fire-Retardant Treatments andElevated Temperatures on Strength Properties of Fire-Retardant Treated Lumber1This standard is issued under the fixed designation D5664;the number immediately following the designation indicates the yea
2、r 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.1.Scope1.1 This test method covers procedures for obtaining data toassess
3、 the initial adjustments to allowable design stresses forlumber treated with candidate commercial fire-retardant(FR)formulations and further procedures for obtaining data toassess the effect of extended exposure to elevated temperatureof 66 6 2C(150 6 4F).1.2 This standard does not purport to addres
4、s all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D9 Terminology Relat
5、ing to Wood and Wood-Based Prod-uctsD143 Test Methods for Small Clear Specimens of TimberD1165 Nomenclature of Commercial Hardwoods and Soft-woodsD3500 Test Methods for Structural Panels in TensionD4761 Test Methods for Mechanical Properties of Lumberand Wood-Base Structural MaterialD5516 Test Metho
6、d for Evaluating the Flexural Properties ofFire-Retardant Treated Softwood Plywood Exposed toElevated TemperaturesD6841 Practice for Calculating Design Value TreatmentAdjustment Factors for Fire-Retardant-Treated LumberE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE176 Term
7、inology of Fire Standards2.2 Other Standards:AWPA C20 LumberFire Retardant Treatment by PressureProcesses3NFPA 703 Standard for Fire Retardant Impregnated Woodand Fire Retardant Coatings for Building Materials4U.S.Product Standards PS 20 American Softwood LumberStandard53.Terminology3.1 DefinitionsD
8、efinitions used in this test method are inaccordance with Terminologies D9 and E176 and Nomencla-ture D1165.4.Summary of Test Method4.1 The general objectives of this test method are to developdata to adjust allowable design stresses of FR-treated lumberfor the initial effects for the tested FR-form
9、ulation(s)and todevelop data on in-service thermal stability after extendedexposure to environmental conditions up to 66 6 2C(150 64F)and 50%relative humidity.4.2 Procedure 1This procedure uses small clear speci-mens cut from end-matched nominal 2 by 4(38 by 89-mm)dimension lumber(see Fig.1)to compa
10、re the initial effects offire-retardant treatments to untreated controls for bending,tension parallel,compression parallel,and horizontal shearproperties.4.3 Procedure 2This procedure uses small clear speci-mens cut from end matched nominal 2 by 4(38 by 89-mm)dimension lumber.This second set of spec
11、imens is used toassess the differential trends between end-matched fire-retardant treated and untreated specimens on bending andtension parallel properties over the course of a prolongedexposure to elevated temperature.1This test method is under the jurisdiction of ASTM Committee D07 on Woodand is t
12、he direct responsibility of Subcommittee D07.07 on Fire Performance ofWood.Current edition approved June 1,2010.Published July 2010.Originally approvedin 1995.Last previous edition approved in 2008 as D5664 08.DOI:10.1520/D5664-10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,or
13、contact 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 Wood Protection Association(AWPA),P.O.Box361784,Birmingham,AL 35236-1784,http:/.4Available from National Fire
14、Protection Association(NFPA),1 BatterymarchPark,Quincy,MA 02169-7471,http:/www.nfpa.org.5Available from American Lumber Standard Committee,Incorporated(ALSC),P.O.Box 210,Germantown,MD 20875-0210,http:/www.alsc.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19
15、428-2959.United States1 4.4 Procedure 3The optional third procedure uses full-sized nominal 2 by 4(38 by 89-mm)dimension lumber tomodify the small clear specimen results from 4.2 and 4.3 forsize effects.5.Significance and Use5.1 The mechanical properties evaluated by this test methodprovide the foll
16、owing:5.1.1 Data for use in developing modification factors for theallowable design properties of fire-retardant treated lumberwhen used at or near room temperatures(see 6.3).5.1.2 Data for use in developing modification factors forallowable design properties of fire-retardant treated lumberwhen exposed to elevated temperatures and humidity(see 6.4).5.1.3 Data(optional)for use in modifying these factors forsize effects when fire-retardant treated lumber is used at or nearroom temperature and whe
