1、Designation:E257307a Designation: E2573 12An American National StandardStandard Practice forSpecimen Preparation and Mounting of Site-FabricatedStretch Systems to Assess Surface Burning Characteristics1This standard is issued under the fixed designation E2573; the number immediately following the de
2、signation indicates 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 () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice describes proc
3、edures for specimen preparation and mounting when testing a site-fabricated stretch system toassess 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 can b
4、e used as a regulatory tool.1.4Use the values stated in inch-pound units as the standard, in referee decisions. The values in the SI system of units are givenin parentheses, for information only; see1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parenth
5、eses are mathematicalconversions to SI units that are provided for information only and are not considered standard. See IEEE/ASTM SI-10 for furtherdetails.1.5 This fire standard cannot be used to provide quantitative measures.1.6 Fire testing of products and materials is inherently hazardous, and a
6、dequate safeguards for personnel and property shall beemployed in conducting these tests. Fire testing involves hazardous materials, operations, and equipment. This standard givesinstructions on specimen preparation and mounting, but the fire-test-response method is given in Test Method E84. See als
7、o Section10.1.71.7 This practice shall not apply to vinyl stretch ceiling materials, which are covered by Practice E2599.1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish approp
8、riate safety and health practices and determine the applicability of regulatorylimitations prior to use.1.8The1.9 The text of this standard references notes and footnotes which provide explanatory material. These notes andfootnotes shall not be considered requirements of the standard.2. Referenced D
9、ocuments2.1 ASTM Standards:2E84 Test Method for Surface Burning Characteristics of Building MaterialsE176 Terminology of Fire StandardsE2599 Practice for Specimen Preparation and Mounting of Reflective Insulation, Radiant Barrier and Vinyl Stretch CeilingMaterials for Building Applications to Assess
10、 Surface Burning CharacteristicsIEEE/ASTM SI-10 International System of Units (SI): The Modern Metric System3. Terminology3.1 DefinitionsFor definitions of terms used in this practice refer to Terminology E176.3.2 Definitions of Terms Specific to This Standard:3.2.1 frame, nan item (plastic extrusio
11、n, wood, metal or other material) that is mounted to an existing substrate via mechanicalfasteners or adhesive, that has a mechanism for holding an outer layer (fabric or vinyl) by tension.3.2.2 joining material, nthe frame piece used to join two or more site fabricated stretch panels together, to c
12、reate a midseam.3.2.3 longitudinal midseam, na seam made from the joining material used in the stretch system, which is centered on the testspecimen and runs the entire length of the test specimen.1This practice is under the jurisdiction of ASTM Committee E05 on Fire Standards and is the direct resp
13、onsibility of Subcommittee E05.22 on Surface Burning.Current edition approved Oct.Feb. 1, 2007.2012. Published October 2007.March 2012. Originally approved in 2007. Last previous edition approved in 2007 as E257307a.DOI: 10.1520/E2573-07A.10.1520/E2573-12.2For referencedASTM standards, visit theASTM
14、 website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an ind
15、ication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be
16、considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2.4 self-supporting specimen, na specimen that remains in place by its own structural characteristics both before and duringthe fire test or is burnt o
17、r pyrolyzed prior to falling away from its original position.3.2.5 site-fabricated stretch system, na system, fabricated on site and intended for acoustical, tackable or aesthetic purposes,that is comprised of three elements: (a) a frame (constructed of plastic, wood, metal or other material) used t
18、o hold fabric in place,(b) a core material (infill, with the correct properties for the application), and (c) an outside layer, comprised of a textile, fabricor vinyl, that is stretched taut and held in place by tension or mechanical fasteners via the frame.3.2.6 vinyl stretch ceiling material, na v
19、inyl material stretched and mechanically fastened to a noncombustible frame andintended to be used as a suspended ceiling without associated backing material.3.2.63.2.7 wide span system, na system that employs a wide span fabric or vinyl, from 10 ft or more in width and minimizesthe use of a midseam
20、 or “joining” material.4. Summary of Practice4.1 This practice describes procedures for specimen preparation and mounting when testing a site-fabricated stretch system toassess flame spread and smoke developed as surface burning characteristics using Test Method E84.5. Significance and Use5.1 Site-f
21、abricated stretch systems used as interior finish are evaluated with Test Method E84 to comply with building, fire, orlife safety code requirements. This practice describes specimen preparation and mounting procedures for such materials andsystems.5.2 The limitations for this procedure are those ass
22、ociated with Test Method E84.5.3 Additional LimitationsThis practice does not apply to test systems that cannot be used to produce self-supportingspecimens. If the test specimen is not self-supporting, further guidance can be found in the appendix of Test Method E84.5.4 This practice shall not apply
23、 to vinyl stretch ceiling materials, which are covered by Practice E2599.6. Conditioning6.1 The test specimens shall be conditioned as described in the section on specimen conditioning in Test Method E84.7. Test Specimens7.1 Testing is to be conducted of test specimens representing the composite sit
24、e-fabricated stretch system.7.2 The test specimen shall contain a frame, core material and an outside layer (textile, fabric or vinyl), representing the installedsystem being tested.7.3 The test specimen sizes shall comply with those described in the test specimen section of Test Method E84. The tes
25、tspecimens shall have a width of between 2014 in. and 24 in. (514 mm and 609 mm), a total length of 24 ft + 12 in. 6 in. (7.32m + 305 mm 152 mm), a minimum thickness of 0.5 in. (13 mm) and a maximum thickness of 4 in. (101 mm). The total testspecimen shall consist of sections joined end-to-end. The
26、minimum length of each section shall be the minimum size of the systemto be used in installed systems, except that the last section (furthest away from the vent end) shall be permitted to be smaller tocomplete the total specimen length.NOTE 1Typical frame lengths in installed systems are 6 to 9 ft (
27、1848-2772 mm).NOTE 2Test Method E84 is intended for test specimens no thicker than 4 in. (101 mm).7.4 If the total thickness of the installed system being tested exceeds 4 in. (101 mm), construct a test specimen with a thinnerframe, using the same materials, for a total thickness of 4 in. (101 mm).8
28、. Test Specimen Preparation for Composite Site-Fabricated Stretch Systems8.1 The test specimen shall be prepared according to the manufacturers installation instructions.8.2 The test specimen shall be self-supporting panels.8.3 The test specimen sections shall consist of the frame material on the pa
29、nel perimeters, the core material, and the textile,fabric or vinyl covering.8.4 The test specimens shall have a longitudinal midseam (made from the frame pieces or from a joining piece) running theentire length of the specimen, to ensure that all components of the system are exposed to the flame fro
30、nt for the duration of thetest.8.4.1 If the site-fabricated stretch system test specimen requires support of the longitudinal midseam, it shall be supported by14 in. (6.3 mm) diameter steel rods spanning the width of the tunnel and spaced not closer than 24 in. (609 mm) apart.8.5 For wide span syste
31、ms (see 3.2.63.2.7), 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 over gypsum wallboard in the field shall be prepared as discussed above,with the test specimen then attached to gypsum wallboard u
32、sing the manufacturers recommended mounting procedure. The systemshall include the longitudinal midseam running the entire length of the test specimen.8.6.1 If the gypsum wallboard is not sufficient to support the weight of the test specimen assembly, the use of14 in. (6.3 mm)diameter steel rods, sp
33、anning the width of the tunnel and spaced not closer than 24 in. (609 mm) apart, shall be permitted to beused to support the assembly.E2573 1229. Testing of Specimens9.1 All testing shall be conducted using the methodology described in Test Method E84.10. Operator Safety10.1 The primary concerns for
34、 operator safety are associated with the fire-test-response procedure, Test Method E84, and notwith the specimen preparation procedure. Safety recommendations are included in Test Method E84.11. Report11.1 Report a detailed description of the system being tested, including a description of the type
35、of frame, core and outside layermaterials being used and of the relative dimensions of each.11.2 Report a detailed description of the specimen preparation used as per Section 8 of this document.11.3 Report the measurements (thickness and width, in inches and millimeters) of the midseam (joining mate
36、rial) that are placedlongitudinally down the center of the test specimen.11.4 Report all the required information in the reporting section of Test Method E84, including observations, graphical resultsand the values of the flame spread index and of the smoke developed index in each result for the com
37、posite system.12. Keywords12.1 fabric; fire; fire test; flame spread; smoke development; stretch system; textile; vinylASTM 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 expressl
38、y 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 by the responsible technical committee and must be reviewed every five years andif not revised, e
39、ither 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 receive careful consideration at a meeting of theresponsible technical committee, which you may atte
40、nd. 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 International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. I
41、ndividual 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).E2573 123
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