1、Designation: D 6513 00 (Reapproved 2005)Standard Practice forCalculating the Superimposed Load on Wood-frame Wallsfor Standard Fire-Endurance Tests1This standard is issued under the fixed designation D 6513; the number immediately following the designation indicates the year oforiginal adoption or,
2、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 practice covers procedures for calculating thesuperimposed axial load requi
3、red to be applied to load-bearingwood-frame walls throughout standard fire-endurance and fireand hose-stream tests.1.2 The calculations determine the maximum load allowedby design for wood-frame wall assemblies under nationallyrecognized structural design criteria.1.3 This practice is only applicabl
4、e to those wood-frameassemblies for which the nationally recognized structuraldesign criteria is the National Design Specification for WoodConstruction (NDS).21.4 The system of units to be used is that of the nationallyrecognized structural design criteria. For the NDS, the units areinch-pound.1.5 T
5、he text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be consideredas requirements of the standard.1.6 This standard does not purport to address all of thesafety concerns, if any, associat
6、ed 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:3D9 Terminology Relating to WoodE119 Test Methods for Fire Tes
7、ts of Building Constructionand MaterialsE 176 Terminology Relating to Fire StandardsE 1529 Test Methods for Determining Effects of LargeHydrocarbon Pool Fires on Structural Members and As-semblies2.2 Other Standards:NDSNational Design Specification for Wood Construc-tion2NDS SupplementDesign Values
8、for Wood Construction23. Terminology3.1 DefinitionsDefinitions used in this practice are inaccordance with Terminology D9 and Terminology E 176,unless otherwise indicated.3.2 Definitions of Terms Specific to This Standard:3.2.1 gross area, nsection area calculated from overallactual dimensions of me
9、mber.3.2.2 net section area, nsection area calculated by deduct-ing from the gross section area the projected area of allmaterials removed by boring, grooving, dapping, notching, orother means.3.2.3 superimposed load, nThe additional external loadneeded to be applied to the assembly to result in the
10、 calculatedstresses within the assembly when any dead load of theassembly itself is accounted for in the calculations.4. Significance and Use4.1 Test Methods E119and E 1529, and other standard fireendurance test methods specify that throughout exposures tofire and the hose stream, a constant superim
11、posed axial load beapplied to a load-bearing test specimen to simulate a maximumload condition. They specify that this superimposed load shallbe as nearly as practicable the maximum load allowed bydesign under nationally recognized structural design criteria.For this practice, the nationally recogni
12、zed structural designcriteria is the National Design Specification for Wood Con-struction (NDS).4.1.1 Alternatively, the standard fire endurance test methodsshall be conducted by applying an axial load that is less thanthe maximum allowable axial load as addressed by the NDSand this practice, but th
13、ese tests shall be identified in the testreport as being conducted under restricted load conditions. Thesuperimposed axial load, as well as the superimposed axialload as a percentage of the maximum allowable axial design1This practice is under the jurisdiction of ASTM Committee D07 on Wood andis the
14、 direct responsibility of Subcommittee D07.07 on Fire Performance of WoodProducts.Current edition approved Oct. 1, 2005. Published October 2005. Originallyapproved in 2000. Last previous edition approved in 2000 as D 6513 00.2Available from American Forest fire resistance; superimposed load; wallass
15、embly; wood studsD 6513 00 (2005)2ASTM International takes no position 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 risko
16、f infringement of such rights, are entirely their own responsibility.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
17、standard or for additional standardsand should be addressed to 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 yo
18、ur views known to the ASTM Committee on Standards, at the address 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).D 6513 00 (2005)3
