1、UL 1709ISBN 0-7629-1074-7Rapid Rise Fire Tests ofProtection Materials forStructural SteelUnderwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096UL Standard for Safety for Rapid Rise Fire Tests of Protection Materials for Structural Steel, UL 1709Third Edition, Dated March 23,
2、2005Revisions: This Standard contains revisions through and including April 6, 2007.Summary of TopicsRevision pages have been issued for UL 1709 to update the title page to indicate thelatest approval date as an American National Standard and to incorporate the proposaldated December 22, 2006.Text t
3、hat has been changed in any manner is marked with a vertical line in the margin. Changes inrequirements are marked with a vertical line in the margin and are followed by an effective date noteindicating the date of publication or the date on which the changed requirement becomes effective.The follow
4、ing table lists the future effective dates with the corresponding item.Future Effective Date ReferencesApril 6, 2009 3.1The new and revised requirements are substantially in accordance with ULs Proposal(s) on this subjectdated December 22, 2006.As indicated on the title page (page 1), this UL Standa
5、rd for Safety is an American National Standard.Attention is directed to the note on the title page of this Standard outlining the procedures to be followedto retain the approved text of this ANSI/UL Standard.The UL Foreword is no longer located within the UL Standard. For information concerning the
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20、 the page or pages beingviewed for their own fair and/or practical internal use.The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the note following theaffect
21、ed item. The prior text for requirements that have been revised and that have a future effective dateare located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.New product submittals made prior to a specified future effective date will be judged under all of therequirements
22、 in this Standard including those requirements with a specified future effective date, unlessthe applicant specifically requests that the product be judged under the current requirements. However, ifAPRIL 6, 2007 UL 1709tr2the applicant elects this option, it should be noted that compliance with all
23、 the requirements in thisStandard will be required as a condition of continued Classification and Follow-Up Services after theeffective date, and understanding of this should be signified in writing.Copyright 2007 Underwriters Laboratories Inc.This Standard consists of pages dated as shown in the fo
24、llowing checklist:Page Date1 .April 6, 20072-3.March 23, 20054 .April 6, 20075-16 .March 23, 2005A1-A2 .April 6, 2007SR1-SR2 .April 6, 2007APRIL 6, 2007 UL 1709 tr3APRIL 6, 2007 UL 1709tr4No Text on This PageMARCH 23, 2005(Title Page Reprinted: April 6, 2007)1UL 1709Standard for Rapid Rise Fire Test
25、s of Protection Materials for StructuralSteelFirst Edition February, 1989Second Edition February, 1994Third EditionMarch 23, 2005The most recent designation of ANSI/UL 1709 as an American National Standard(ANSI) occurred on April 4, 2007. The ANSI approval for this standard does notinclude the Cover
26、 Page, Transmittal Pages, or Title Page.This ANSI/UL Standard for Safety, which consists of the Third Edition, includingrevisions through April 6, 2007, is under continuous maintenance, whereby eachrevision is ANSI approved upon publication.An effective date included as a note immediately following
27、certain requirementsis one established by Underwriters Laboratories Inc. and is not part of the ANSIapproved Standard.Revisions of this Standard will be made by issuing revised or additional pagesbearing their date of issue. A UL Standard is current only if it incorporates themost recently adopted r
28、evisions, all of which are itemized on the transmittal noticethat accompanies the latest set of revised requirements. Comments or proposalsfor revisions on any part of the Standard may be submitted to UL at any time.Proposals should be submitted via a Proposal Request in ULs On-LineCollaborative Sta
29、ndards Development System (CSDS) at http:/.ISBN 0-7629-1074-7COPYRIGHT 2005, 2007 UNDERWRITERS LABORATORIES INC.ANSI/UL 1709-2007MARCH 23, 2005UL 17092No Text on This PageCONTENTSINTRODUCTION1 Scope .42 General .42.1 Units of measurement .42.2 Undated references .4FULL-SCALE TEST METHOD3 Furnace Con
30、trol .44 Furnace Calibration .75 Test Sample .126 Performance Criteria .14SMALL-SCALE TEST METHOD7 Furnace Control During Fire Test .148 Test Sample .149 Test Method .1610 Performance Criteria .16APPENDIX AA1 Exposure Conditions .A1MARCH 23, 2005 UL 1709 3INTRODUCTION1 Scope1.1 These requirements de
31、scribe a test method measuring the resistance of protective materials torapid-temperature-rise fires.1.2 The test method covers a full-scale fire exposure, intended to evaluate the thermal resistance ofprotective material applied to structural members and the ability of the protective material to wi
32、thstand thefire exposure.1.3 The test method also covers a small-scale fire exposure, intended to evaluate the ability of protectivematerials to withstand a variety of environmental conditions anticipated.2 General2.1 Units of measurement2.1.1 Values stated without parentheses are the requirement. V
33、alues in parentheses are explanatory orapproximate information.2.2 Undated references2.2.1 Any undated reference to a code or standard appearing in the requirements of this standard shallbe interpreted as referring to the latest edition of that code or standard.FULL-SCALE TEST METHOD3 Furnace Contro
34、l3.1 The fire environment within the furnace is to develop a total heat flux of 65,000 5000 Btu/hft2(20416 kW/m2) and an average temperature of 2000 100F (1093 56C) within 5 min from the start of thetest. The fire environment is to be controlled by reproducing the furnace temperatures recorded durin
35、g thefurnace calibration method specified in Furnace Calibration, Section 4. This temperature is to bemaintained throughout the remainder of the fire test as shown in Figure 3.1.Revised 3.1 effective April 6, 2009This is generated text for figtxt.APRIL 6, 2007UL 17094Figure 3.1Time-temperature curve
36、MARCH 23, 2005 UL 1709 53.2 The furnace is to be controlled to maintain the area under the time-temperature curve to within 10%of the corresponding area under the standard time-temperature curve shown in Figure 3.1 for fire tests of60 min or less duration; to within 7.5% for tests longer than 60 min
37、 but not longer than 120 min; and towithin 5% for tests exceeding 120 min in duration. The area under the time-temperature curve is to beobtained by averaging the results from the pyrometer or thermocouple readings.3.3 A correction is to be applied for variation of the furnace exposure from the pres
38、cribed, where suchvariation will affect the test results, by multiplying the indicated time period by two-thirds of the valueobtained by dividing the difference in area between the curve of average furnace temperature and thestandard curve for the first three-fourths of the period by the area betwee
39、n the standard curve above abase line of 68F (20C) for the same part of the indicated period during the first part of the test. For fireexposure times longer than standard, the indicated rating period is to be increased by the amount of thecorrection and for fire exposure times less than standard, t
40、he indicated rating period is to be similarlydecreased. The correction can be expressed by the following formula:In which:C is the correction in the same units as I,I is the indicated fire-resistance period,A is the area under the curve of indicated average furnace temperature for the first three-fo
41、urthsof the indicated period, andAsis area under the standard furnace curve for the same part of the indicated period.3.4 The temperature fixed by the requirements of Furnace Calibration, Section 4, is to be the averagetemperature obtained from the readings of eight thermocouples symmetrically dispo
42、sed and distributedwithin the test furnace to show the temperature near all parts of the assembly.3.5 The thermocouples are to be fabricated by fusion-welding the twisted ends of 0.064 in (1.6 mm)diameter (No. 14 B&S gauge) chromel-alumel wires having a time constant of 2 min or less, and mountingth
43、e wires in porcelain insulators. The thermocouple assembly is to be inserted through a standard weight,nominal 1/2 in iron, steel or inconel pipe, and the end of the pipe from which the welded junction protrudesis to be open. The thermocouple junction is to protrude 1/2 in (12.7 mm) from the open en
44、d of the pipe.3.6 The junction of the thermocouples is to be placed 4 in (102 mm) away from the exposed face of thetest specimen and located at the 1/3 and 2/3 heights of the test specimen.MARCH 23, 2005UL 170963.7 Each thermocouple within the furnace shall be read at intervals not exceeding 1 min d
45、uring the first30 min of the test and at intervals not exceeding 5 min during the remainder of the test.4 Furnace Calibration4.1 A furnace calibration record is to be maintained and the furnace is to be recalibrated after completionof any repair that could alter the heat generation, retention or flow characteristics of the
