1、Designation: E 759 92 (Reapproved 2005)Standard Test Method forEffect of Deflection on Sprayed Fire-Resistive MaterialApplied to Structural Members1This standard is issued under the fixed designation E 759; the number immediately following the designation indicates the year oforiginal adoption or, i
2、n 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1
3、This test method covers a procedure for determining theeffect of deflection on sprayed fire-resistive material (SFRM)applied to steel deck. These materials include sprayed fibrousand cementitious materials applied directly in contact with thestructural members. The test method is applicable only tol
4、aboratory procedures.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 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 stan
5、dard 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:2E84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE119 Test Methods for Fire Tests of Building Construct
6、ionand MaterialsE 605 Test Methods for Thickness and Density of SprayedFire-Resistive Material (SFRM) Applied to StructuralMembers3. Summary of Test Method3.1 In this test method, a cellular steel deck panel sprayedwith fire-resistive material is subjected to bending by a verticalcenter load while s
7、upported horizontally at its ends.4. Significance and Use4.1 The intent of this test method is to determine propertiesof direct-applied SFRM that may be used to provide anindication of serviceability. Satisfactory performance of fire-resistive material applied to structural members and assembliesdep
8、ends upon its ability while in place to withstand the variousinfluences that may occur during the life of the structure, aswell as upon its satisfactory performance under fire tests.4.2 This test method measures the behavior of SFRM whensubjected to deflection and evaluates such phenomena asspalling
9、 and delamination under bending stress. It is anindication of the ability of SFRM to remain in place and resistremoval during anticipated service conditions.5. Apparatus5.1 SupportsRigid base to provide at least 50 mm (2 in.)bearing and a clear span between supports of 3 m (10 ft).5.2 Bearing BlockA
10、pproximately 50 mm (2 in.) wide,minimum 600 mm (24 in.) long bearing surface designed todistribute the load across the width of the specimen.5.3 LoadAny form of weights or testing machine capableof applying a load normal to the test surface and of developinga deflection of1120 of the clear span of t
11、he specimen.5.4 Deflection Gage A dial or digital micrometer gradu-ated to 0.01 mm (0.001 in.).6. Materials and Manufacture6.1 The specimen shall consist of cellular steel deck nomi-nal 40 mm (112 in.) deep, 600 mm (24 in.) wide, by 3600 mm(12 ft) long, consisting of a 1.5 mm (0.060 in. (18 ga.) thi
12、ckgalvanized steel fluted top section and a 1.2-mm (0.048-in.)galvanized steel flat bottom section welded together to formfour cells 150 mm (6 in.) on center.6.2 This test method requires the application of SFRM inaccordance with manufacturers published instructions. Theapparatus, materials, and pro
13、cedures used to apply the SFRMfor this test shall be representative of application in the field.1This test method is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommittee E06.21on Serviceability.Current edition approved May 1, 2005.
14、Published May 2005. Originallyapproved in 1980. Last previous edition approved in 2000 as E 759 92 (2000).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 standa
15、rds Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.3 The density of the prepared sample shall be similar tothe density tested and reported during the Test Methods E84and E 119 fire exposure
16、s or as required by the sponsor of thetest.6.4 Determine the density and thickness of each of thelaboratory-prepared specimens. Report in accordance with TestMethods E 605.7. Test Specimen7.1 Apply the SFRM to the underside of the steel deck at aminimum 19 mm (34 in.) thickness. Do not apply the SFR
17、M tothe area 330 mm (13 in.) from each end of the specimen, inorder to permit the steel deck to bear directly on the supports.7.2 Condition the prepared specimen for a period of not lessthan one week at ambient temperature and humidity conditions(but not less than 4.4C (40F) until cured.7.3 Conditio
18、n the specimen for a period sufficient to beconsidered dry in accordance with the manufacturers recom-mendation.8. Procedure8.1 Place the specimen on the test supports with the SFRMas the lower surface.8.2 To measure the deflection of the specimen, record theinitial reading of the dial micrometer pr
19、ior to the application ofthe load and record the deformation as the load is applied.8.3 Apply a vertical center load to the upper face of thespecimen by means of a bearing block to develop a deflectionof1120 of the clear span, that is, 25 mm (1.0 in.).9. Report9.1 Report the following information:9.
20、1.1 Condition of the test specimen when it has deflectedthe required1120 the clear span,9.1.2 Any spalling or delamination, and9.1.3 Thickness of the SFRM in millimetres (or inches) andthe density in kilograms per cubic metre (or pounds per cubicfoot).10. Precision and Bias10.1 No statement is made
21、about either precision or bias ofthis test method since the results merely describe qualitativelythe physical condition of the test specimen after exposure to thespecified procedure.11. Keywords11.1 deflection; sprayed cementitious; sprayed-fire-resistivematerials (SFRM)ASTM International takes no p
22、osition respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsib
23、ility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to
24、ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the addre
25、ss shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).E 759 92 (2005)2
