ASTM D5664-2002 Standard Test Method for Evaluating the Effects of Fire-Retardant Treatments and Elevated Temperatures on Strength Properties of Fire-Retardant Treated Lumber《评定阻燃处.pdf
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1、Designation: D 5664 02Standard 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 D 5664; the number immediately following the designation indicates th
2、e 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers procedures for obtaining
3、data toassess 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 pu
4、rport 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:D
5、9 Terminology Relating to Wood2D 143 Methods of Testing Small Clear Specimens of Wood2D 1165 Nomenclature of Domestic Hardwoods and Soft-woods2D 3500 Test Methods for Structural Panels in Tension2D 4761 Test Method for Mechanical Properties of Lumberand Wood-Base Structural Material2D 5516 Test Meth
6、od for Evaluating the Flexural Propertiesof Fire-Retardant Treated Softwood Plywood Exposed toElevated Temperatures2E 84 Test Method for Surface Burning Characteristics ofBuilding Materials3E 176 Terminology of Fire Standards32.2 Other Standards:AWPA C20 LumberFire Retardant Treatment by PressurePro
7、cesses4NFPA 703 Standard for Fire Retardant Impregnated Woodand Fire Retardant Coatings for Building Materials5U.S. Product Standard PS 20 American Softwood LumberStandard63. Terminology3.1 DefinitionsDefinitions used in this test method are inaccordance with Terminologies D 9 and E 176 and Nomencla
8、-ture D 1165.4. 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-formulation(s) and todevelop data on in-service thermal stability after extendedexposure to enviro
9、nmental 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 compare the initial effects offire-retardant treatments to untreated controls for bending
10、,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 specimens is used toassess the differential trends between end-matched fire-retardan
11、t treated and untreated specimens on bending andtension parallel properties over the course of a prolongedexposure to elevated temperature.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
12、4.3 forsize effects.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 Sept. 10, 2002. Published November 2002. Originallypublished as D 566495. Last previous edition D 5
13、66401a.2Annual Book of ASTM Standards, Vol 04.10.3Annual Book of ASTM Standards, Vol 04.07.4Available from American Wood-Preservers Assoc., P.O. Box 5690, Granbury,TX 760490690.5Available from National Fire Protection Association, P.O. Box 9191, Quincy,MA 02269-9101.6Available from The American Lumb
14、er Standard Committee, P.O. Box 210,Germantown, MD 20875-0210.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5. Significance and Use5.1 The mechanical properties evaluated by this test methodprovide the following:5.1.1 Data for use
15、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 tempera
16、tures 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 when exposed to elevated temperaturesand humidity (see 6.5).5.2 Data from the first two procedures in this test method ofeva
17、luation are indicative only for that species.NOTE 1The results of the three listed species (Southern pine, Douglasfir, and either white spruce or a Spruce/Fir mixture) may be used togetherto make inference on untested wood species because the three testedspecies represent the full spectrum of expect
18、ed treatability.5.3 Data from the optional third part of this three-partmethod of evaluation are indicative for all species because it isprimarily used to assess size effects.6. Procedures6.1 Treatment:6.1.1 Pressure treat those pieces designated for treatmentwith the fire-retardant formulation bein
19、g evaluated. The gageretention level of each charge shall not be less than themidpoint of the retention range as specified for the species bythe agency certifying the flame spread index of the treatedlumber. The retention range specified by the certifying agencyshall provide a flame-spread index of
20、25 or less when tested inaccordance with Test Method E 84 for 10 min, show noevidence of significant progression combustion when the test iscontinued for an additional 20-min period and not allowprogression of the flame front beyond a distance of 3.2 m (10.5ft) beyond the centerline of the burners a
21、nytime during the30-min extended test.6.1.1.1 The provisions of 6.1.1 are not intended to preventuse of this test standard when the fire-retardant treatmentsbeing certified are for applications other than those requiringconformance to AWPA Standard C-20, NFPA Standard 703, orsimilar building code re
22、quirements for “fire-retardant-treatedwood” that require the Test Method E 84 test extended to 30min. When alternative performance criteria for the treatmentare being certified, the test report on specimens of thattreatment shall state clearly the alternative performance criteriaand that the treatme
23、nt retention was limited to that required forthe alternative performance criteria.6.1.2 Weigh all treated pieces before and immediately aftertreatment to determine the chemical retention based on thesolution retained and the concentration of chemicals in thesolution. Complete a treating report for e
24、ach charge of materialto document the treating cycle, times, pressures, gage retention,and piece retentions.6.2 Post-treatment Drying:6.2.1 After pressure treatment, kiln dry the treated pieces toa maximum moisture content of 19 % following the standardredrying procedures established for the treatme
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