ASTM E108-2007a Standard Test Methods for Fire Tests of Roof Coverings《屋顶覆盖物燃烧试验的标准试验方法》.pdf

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1、Designation: E 108 07aAn American National StandardStandard Test Methods forFire Tests of Roof Coverings1This standard is issued under the fixed designation E 108; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last re

2、vision. 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 This fire-test-response standard covers the

3、 measurementof the relative fire characteristics of roof coverings undersimulated fire originating outside the building. It is applicableto roof coverings intended for installation on either combus-tible or noncombustible decks when applied as intended foruse. The following test methods are included

4、:1.1.1 Intermittent flame exposure test.1.1.2 Spread of flame test.1.1.3 Burning brand test.1.1.4 Flying brand test.1.1.5 Rain test.1.2 Three classes of fire test exposure are described:1.2.1 Class A Tests are applicable to roof coverings that areeffective against severe test exposure, afford a high

5、 degree offire protection to the roof deck, do not slip from position, anddo not present a flying brand hazard.1.2.2 Class B Tests are applicable to roof coverings that areeffective against moderate test exposure, afford a moderatedegree of fire protection to the roof deck, do not slip fromposition,

6、 and do not present a flying brand hazard.1.2.3 Class C Tests are applicable to roof coverings that areeffective against light test exposure, afford a light degree of fireprotection to the roof deck, do not slip from position, and donot present a flying brand hazard.1.3 The values stated in inch-pou

7、nd units shall be regardedas the standard. Values given in brackets are for informationonly.1.4 This standard is used to measure and describe theresponse of materials, products, or assemblies to heat andflame under controlled laboratory conditions, but does not byitself incorporate all factors requi

8、red for fire hazard or fire riskassessment of the materials, products or assemblies underactual fire conditions.1.5 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 saf

9、ety and health practices and determine the applica-bility of regulatory limitations prior to use.1.6 The text of this standard references notes and footnotesthat provide explanatory information. These notes and foot-notes, excluding those in tables and figures, shall not beconsidered as requirements

10、 of this standard.2. Referenced Documents2.1 ASTM Standards:2D 225 Specification for Asphalt Shingles (Organic Felt)Surfaced With Mineral GranulesD 226 Specification for Asphalt-Saturated Organic FeltUsed in Roofing and WaterproofingD 227 Specification for Coal-Tar-Saturated Organic FeltUsed in Roof

11、ing and WaterproofingD 250 Specification for Asphalt-Saturated Asbestos FeltUsed in Roofing and Waterproofing3D 312 Specification for Asphalt Used in RoofingD 450 Specification for Coal-Tar Pitch Used in Roofing,Dampproofing, and WaterproofingD 1227 Specification for Emulsified Asphalt Used as aProt

12、ective Coating for RoofingD 2178 Specification for Asphalt Glass Felt Used in Roof-ing and WaterproofingD 2626 Specification for Asphalt-Saturated and Coated Or-ganic Felt Base Sheet Used in RoofingD 2898 Test Methods for Accelerated Weathering of Fire-Retardant-Treated Wood for Fire TestingD 3018 S

13、pecification for ClassAAsphalt Shingles Surfacedwith Mineral GranulesD 3158 Discontinued 1984; Specification forAsphalt Satu-rated and Coated Organic Felt Used in Roofing4D 3378 Discontinued 1985; Specification for Asphalt-Saturated and Coated Asbestos Felt Base Sheet Used inRoofing4D 3462 Specifica

14、tion forAsphalt Shingles Made from GlassFelt and Surfaced with Mineral Granules1These test methods are under the jurisdiction ofASTM Committee E05 on FireStandards and are the direct responsibility of Subcommittee E05.14 on External FireExposure Tests.Current edition approved Feb. 1, 2007. Published

15、 March 2007. Originallyapproved in 1955. Last previous edition approved in 2007 as E 108 - 07.2For 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 standards Document

16、 Summary page onthe ASTM website.3Withdrawn.4Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.D 4442 Test Methods for Direct Moisture Content Measure-ment of Wood and Wood-Base MaterialsD 4444 Test Methods for Use and Calibr

17、ation of Hand-HeldMoisture Meters2.2 UL Standards:UL 55A Materials for Built-Up Roof Coverings5UL790 Tests for Fire Resistance of Roof Covering Materi-als52.3 NFPA Standards:NFPA 256 Tests of Roof Coverings63. Terminology3.1 Definitions: Definitions:3.1.1 significant lateral spreadsurface flaming be

18、yond1-ft. from the lead edge, extending outward to both lateraledges of the test deck assembly or to both inner edges of metalbatten strips, if used, along the side edges of the test deckassembly.3.1.2 sustained flamingany flaming which continues un-interrupted for 5 seconds or more.3.1.3 prepared r

19、oof coveringproducts consisting ofshingles, tiles, panels or rolled materials that are typically usedfor high slope roof applications which are applied directly tothe roof deck (usually with one or more layers of underlaymentand with or without battens) in accordance with installationinstructions su

20、pplied with the products.4. Significance and Use4.1 The test methods described herein are intended toprovide a basis for relative comparison of roof coverings. Thetest methods include simulated fire exposure to the outside ofthe roof coverings, and, where applicable, a determination as towhether the

21、 fire performance characteristics of the roof cover-ings will be adversely affected by prolonged exposure to rain.4.2 These test methods measure the surface spread of flameand the ability of the roof covering material or system to resistfire penetration from the exterior to the underside of a roofde

22、ck under the conditions of exposure.4.3 These test methods also provide criteria to determine ifthe roof covering material will develop flying burning material,identified as flying brands, when subjected to a 12-mph5.3-m/s wind during the simulated fire exposure tests.4.4 These test methods do not n

23、ecessarily illustrate theexpected performance of roof coverings under all actual fireconditions, but they do provide a basis for comparing roofcovering materials when subjected to fire sources that aredescribed herein.4.5 These test methods do not provide any basis for deter-mining the fire resistan

24、ce characteristics when exposed to a fireoriginating in the building to which the roofing material isapplied.4.6 The test methods described herein involve calibratingthe test equipment using a calibration deck inclined at a slopeof 5 in. per horizontal ft (0.416:1). The tests described hereinare per

25、formed on test decks inclined at slopes up to andincluding 5 in. per horizontal ft. The severity of the testexposure decreases as the slope of the test deck decreasesbelow 5 in. per horizontal ft.5. Apparatus and Calibration5.1 The essential elements of the fire test apparatus areillustrated in Fig.

26、 1. They include a test roof deck A,anadjustable frame B (see Fig. 2) on which the test roof deck ismounted, a gas burner C as a source of flame, a wind tunnel D,an air velocity meter with or without the use of a timing device,a gas pressure gage, a control valve, and an adjustable airsupply. Contro

27、l of the shape and size of the flame dependsupon minimizing air turbulence in the immediate vicinity of theapparatus. During the test:5.1.1 Provide free outlet to outside air beyond and above thetest apparatus to exhaust air introduced into the test room bythe blower, and5.1.2 Close all openings int

28、o the test room other than thosementioned in 5.1.1, such as doors and windows.5.2 The temperature of the air supplied by the blower shallbe maintained between 50 and 90F 10 and 32C.5.3 Fig. 3 illustrates the essential elements of the rain testapparatus.5.4 Calibrating Air Current:5.4.1 Set up the te

29、st apparatus for the intermittent flame testand position a bare 3-ft, 4-in. by 4-ft, 4 in. (1 m by 1.3 m)plywood, gypsum board or fiber cement board calibration deckon the framework at an incline of 5 in. per horizontal ft(0.416:1).5.4.2 Measure the air velocity midway up the slope of thecalibration

30、 deck at its center and 3 in. 76 mm from each edge.NOTE 1Any direct reading instrument with scale graduated in incre-ments of not more than 20 ft/min 6 m/min or any timed instrument withscale graduated (for a 1 min timed reading) in increments of not more than5 ft/min 1.5 m/min will be suitable.5.4.

31、3 Position the center of the air measuring device 334 618 in. 95 6 3 mm above the surface. The air flow through andaround the instrument shall be as free and undisturbed aspossible.5.4.4 Adjust the air supply system to produce a 1 min timedaverage velocity of 1056 6 44 ft/min corresponding to12 6 0.

32、5 mph 5.3 6 0.2 m/s at each of the three locationsdetailed in 5.4.2.5.5 Calibrating Flame Temperature:5.5.1 Following the calibration of the air current describedin 5.4, position a fiber cement board calibration deck, 4 ft, 4 in.(1.3 m) long on the framework at an incline of 5 in. perhorizontal ft (

33、0.416:1).5.5.2 Measure the temperature with a No. 14BEach 214 by 12-in. 57 by 305-mm face for 45 s; andEach 12 by 12-in. 305 by 305-mm face again for 30 s.10.4.2 Expose Class B test brands to the flame for 4 min,during which time they shall be rotated so as to present eachsurface to the flame in the

34、 following manner and sequence:Each 6 by 6-in. 152 by 152-mm face for 30 s;Each 214 by 6-in. 57 by 152-mm face for 30 s; andEach 6 by 6-in. 152 by 152-mm face again for 30 s10.4.3 Expose Class C test brands to the flame for 2 min,during which time they shall be rotated so as to present each ofthe 11

35、2 by 112-in. 38 by 38-mm faces to the flame for 1 min.(See Appendix X1 for metric equivalents.)FIG. 5 Brands for Classes A, B, and C TestsE 108 07a710.5 Test Conditions:10.5.1 Class A Tests:10.5.1.1 Place a brand on the surface of each test deck at thelocation considered most vulnerable (point of mi

36、nimum cov-erage over deck joint) with respect to ignition of the deck butin no case closer than 4 in. 101 mm from either side or 12 in.305 mm from the top or bottom edge of the deck. Place thebrand so that the strips in both the upper and lower layers areparallel to the direction of air flow and wit

37、h the upper edge ofthe brand located 3 in. 76 mm above the horizontal joint inthe test deck. Secure to the deck by a No. 18Bthe saw kerf on the deck side of the brand is parallel to thedirection of air flow.10.5.3.1 In addition to 10.5.3, when the roof covering iscomprised of lapped courses that are

38、 composed of loose orunfastened portions that are capable of being bent up to 90without injury to the fastenings, cut away the loose orunfastened portions and place the brand so it is not closer than12 in. 13 mm from the bottom edge of the lapped courseabove, nor closer than 2 in. 51 mm to a joint i

39、n the roofcovering material in the same course. When the roof coveringis comprised of rigid lapped courses, place the brands over ajoint in the roof covering material in the course approximately12 in. 13 mm from the bottom edge of the lapped courseabove.10.5.3.2 If the roof covering is applied to pl

40、ywood or otherpanel type decks, place the brands so that as many of the 20brands as possible are centered over panel joints in the testdeck.10.6 Duration of TestContinue each individual test, ClassA, B, or C, until the brand is totally consumed and until allevidence of flame, glow, and smoke has dis

41、appeared from boththe exposed surface of the material being tested and theunderside of the test deck, or until failure occurs but not formore than 112 h. Disregard the results of tests in which thebrands do not show progressive and substantially completeconsumption after application to the test deck

42、. If brands arereplaced, do not locate in the same area as the disregardedbrand.10.7 ObservationsDuring and after the burning brandtests, observe for the appearance of sustained flaming on theunderside of the test deck, production of flaming or glowingbrands of roof covering material, displacement o

43、f the testsample, and the exposure or falling away of portions of the roofdeck.11. Flying Brand Test11.1 Conduct this test on a minimum of two test decks.11.2 Mount a test deck, 4 ft-4 in. 1.3 m long in the samemanner and use luminous gas flame as described in 8.2 for theintermittent flame test.11.3

44、 Apply the Classes A and B test gas flame continuouslyfor 10 min. Apply the Class C test flame continuously for 4min. Maintain the 12-mph 5.4-m/s air current until allevidence of flame, glow, and smoke has disappeared from theexposed surface of the material being tested to determine ifflying brands

45、will be developed. On treated wood shakes thevelocity of the air current shall be increased to 18 6 0.75 mph8.0 6 0.3 m/s after the gas flame is extinguished.12. Rain Test12.1 Conduct this test in accordance with Method A of TestMethods D 2898 on six decks.12.2 Mount test decks 4 ft-4 in. 1.3 mm lon

46、g in aframework at a slope of 4 in. per horizontal ft (333 mm perhorizontal m).Approximately 7 ft 2.1 m above the test decks,mount spray nozzles that deliver an average of 0.7 in./h 0.05mm/s of water for the test deck area at a temperature between35 and 60F 2 and 16C. Expose the test decks to twelve

47、1-week cycles. Each cycle consists of 96 h of water exposureand 72 h of drying time at 140F 60C.12.2.1 An alternative test cycle is permitted. Alternatelyexpose two sets of six decks to seven days of water exposure,two days of draining, and five days of curing at 140F 60C.Repeat this cycle seven tim

48、es, except that the seventh waterexposure is reduced to six days.12.2.2 Control the final drying cycle temperature so themoisture content of the deck lumber is from 8 to 12 % (seeNote 2). For plywood deck the moisture content shall notexceed 8 %.E 108 07a812.3 Repeat the intermittent flame, burning

49、brand, andflying brand tests in duplicate.13. Weathering Tests13.1 12.1 These test decks are to be mounted outdoorsfacing south at an incline of 5 in. per horizontal foot 416 mmper horizontal meter. Care shall be taken to protect the deckframe and underside from the effects of the weather. One set ofdecks shall be prepared for testing and tested after each of 1, 2,3, 5 and 10 years of exposure. From each set of decks, one deckis to be subjected to the Intermittent Flame Exposure Test(Section 8) , one to