1、Designation: E 2573 07aAn American National StandardStandard Practice forSpecimen Preparation and Mounting of Site-FabricatedStretch Systems to Assess Surface Burning Characteristics1This standard is issued under the fixed designation E 2573; the number immediately following the designation indicate
2、s the 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 practice describes procedures for specim
3、en prepa-ration and mounting when testing a site-fabricated stretchsystem to assess flame spread and smoke developed as surface-burning characteristics using Test Method E84.1.2 Testing is conducted with Test Method E84.1.3 This practice does not provide pass/fail criteria that canbe used as a regul
4、atory tool.1.4 Use the values stated in inch-pound units as the stan-dard, in referee decisions. The values in the SI system of unitsare given in parentheses, for information only; see IEEE/ASTM SI-10 for further details.1.5 This fire standard cannot be used to provide quantitativemeasures.1.6 Fire
5、testing of products and materials is inherentlyhazardous, and adequate safeguards for personnel and propertyshall be employed in conducting these tests. Fire testinginvolves hazardous materials, operations, and equipment. Thisstandard gives instructions on specimen preparation andmounting, but the f
6、ire-test-response method is given in TestMethod E84. See also Section 10.1.7 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 and health practices and determine
7、the applica-bility of regulatory limitations prior to use.1.8 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotesshall not be considered requirements of the standard.2. Referenced Documents2.1 ASTM Standards:2E84 Test Method for Surfa
8、ce Burning Characteristics ofBuilding MaterialsE 176 Terminology of Fire StandardsIEEE/ASTM SI-10 International System of Units (SI): TheModern Metric System3. Terminology3.1 DefinitionsFor definitions of terms used in this prac-tice refer to Terminology E 176.3.2 Definitions of Terms Specific to Th
9、is Standard:3.2.1 frame, nan item (plastic extrusion, wood, metal orother material) that is mounted to an existing substrate viamechanical fasteners or adhesive, that has a mechanism forholding an outer layer (fabric or vinyl) by tension.3.2.2 joining material, nthe frame piece used to join twoor mo
10、re site fabricated stretch panels together, to create amidseam.3.2.3 longitudinal midseam, na seam made from thejoining material used in the stretch system, which is centeredon the test specimen and runs the entire length of the testspecimen.3.2.4 self-supporting specimen, na specimen that remainsin
11、 place by its own structural characteristics both before andduring the fire test or is burnt or pyrolyzed prior to falling awayfrom its original position.3.2.5 site-fabricated stretch system, na system, fabricatedon site and intended for acoustical, tackable or aestheticpurposes, that is comprised o
12、f three elements: (a) a frame(constructed of plastic, wood, metal or other material) used tohold fabric in place, (b) a core material (infill, with the correctproperties for the application), and (c) an outside layer,comprised of a textile, fabric or vinyl, that is stretched taut andheld in place by
13、 tension or mechanical fasteners via the frame.3.2.6 wide span system, na system that employs a widespan fabric or vinyl, from 10 ft or more in width and minimizesthe use of a midseam or “joining” material.1This practice is under the jurisdiction of ASTM Committee E05 on FireStandards and is the dir
14、ect responsibility of Subcommittee E05.22 on SurfaceBurning.Current edition approved Oct. 1, 2007. Published October 2007. Originallyapproved in 2007. Last previous edition approved in 2007 as E 257307.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Serv
15、ice at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4. Summary of Practice4.1 This practice desc
16、ribes procedures for specimen prepa-ration and mounting when testing a site-fabricated stretchsystem to assess flame spread and smoke developed as surfaceburning characteristics using Test Method E84.5. Significance and Use5.1 Site-fabricated stretch systems used as interior finish areevaluated with
17、 Test Method E84to comply with building, fire,or life safety code requirements. This practice describesspecimen preparation and mounting procedures for such ma-terials and systems.5.2 The limitations for this procedure are those associatedwith Test Method E84.5.3 Additional LimitationsThis practice
18、does not apply totest systems that cannot be used to produce self-supportingspecimens. If the test specimen is not self-supporting, furtherguidance can be found in the appendix of Test Method E84.6. Conditioning6.1 The test specimens shall be conditioned as described inthe section on specimen condit
19、ioning in Test Method E84.7. Test Specimens7.1 Testing is to be conducted of test specimens represent-ing the composite site-fabricated stretch system.7.2 The test specimen shall contain a frame, core materialand an outside layer (textile, fabric or vinyl), representing theinstalled system being tes
20、ted.7.3 The test specimen sizes shall comply with those de-scribed in the test specimen section of Test Method E84. Thetest specimens shall have a width of between 2014 in. and 24in. (514 mm and 609 mm), a total length of 24 ft + 12 in. 6in. (7.32 m + 305 mm 152 mm), a minimum thickness of 0.5in. (1
21、3 mm) and a maximum thickness of 4 in. (101 mm). Thetotal test specimen shall consist of sections joined end-to-end.The minimum length of each section shall be the minimum sizeof the system to be used in installed systems, except that thelast section (furthest away from the vent end) shall bepermitt
22、ed to be smaller to complete the total specimen length.NOTE 1Typical frame lengths in installed systems are 6 to 9 ft(1848-2772 mm).NOTE 2Test Method E84is intended for test specimens no thickerthan 4 in. (101 mm).7.4 If the total thickness of the installed system being testedexceeds 4 in. (101 mm),
23、 construct a test specimen with athinner frame, using the same materials, for a total thickness of4 in. (101 mm).8. Test Specimen Preparation for Composite Site-Fabricated Stretch Systems8.1 The test specimen shall be prepared according to themanufacturers installation instructions.8.2 The test spec
24、imen shall be self-supporting panels.8.3 The test specimen sections shall consist of the framematerial on the panel perimeters, the core material, and thetextile, fabric or vinyl covering.8.4 The test specimens shall have a longitudinal midseam(made from the frame pieces or from a joining piece) run
25、ningthe entire length of the specimen, to ensure that all componentsof the system are exposed to the flame front for the duration ofthe test.8.4.1 If the site-fabricated stretch system test specimenrequires support of the longitudinal midseam, it shall besupported by14 in. (6.3 mm) diameter steel ro
26、ds spanning thewidth of the tunnel and spaced not closer than 24 in. (609 mm)apart.8.5 For wide span systems (see 3.2.6), the normal “frame”piece shall be used to create the longitudinal midseam on thetest specimens.8.6 The test specimens for systems that are installed overgypsum wallboard in the fi
27、eld shall be prepared as discussedabove, with the test specimen then attached to gypsum wall-board using the manufacturers recommended mounting pro-cedure. The system shall include the longitudinal midseamrunning the entire length of the test specimen.8.6.1 If the gypsum wallboard is not sufficient
28、to support theweight of the test specimen assembly, the use of14 in. (6.3mm) diameter steel rods, spanning the width of the tunnel andspaced not closer than 24 in. (609 mm) apart, shall be permittedto be used to support the assembly.9. Testing of Specimens9.1 All testing shall be conducted using the
29、 methodologydescribed in Test Method E84.10. Operator Safety10.1 The primary concerns for operator safety are associ-ated with the fire-test-response procedure, Test Method E84,and not with the specimen preparation procedure. Safetyrecommendations are included in Test Method E84.11. Report11.1 Repor
30、t a detailed description of the system beingtested, including a description of the type of frame, core andoutside layer materials being used and of the relative dimen-sions of each.11.2 Report a detailed description of the specimen prepara-tion used as per Section 8 of this document.11.3 Report the
31、measurements (thickness and width, ininches and millimeters) of the midseam (joining material) thatare placed longitudinally down the center of the test specimen.11.4 Report all the required information in the reportingsection of Test Method E84, including observations, graphicalresults and the valu
32、es of the flame spread index and of thesmoke developed index in each result for the compositesystem.12. Keywords12.1 fabric; fire; fire test; flame spread; smoke development;stretch system; textile; vinylE 2573 07a2ASTM International takes no position respecting the validity of any patent rights ass
33、erted 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 responsibility.This standard is subject to revision at any time b
34、y 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 ASTM International Headquarters. Your comments will rece
35、ive 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 address shown below.This standard is copyrighted by ASTM Inte
36、rnational, 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 2573 07a3
