1、Designation: E 1264 98 (Reapproved 2005)Standard Classification forAcoustical Ceiling Products1This standard is issued under the fixed designation E 1264; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、 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 classification covers ceiling products that pro
3、videacoustical performance and interior finish in buildings. Prod-ucts used in performance spaces and other special applicationsmay require more detailed specification than provided by thisclassification.1.2 This classification classifies acoustical ceilings by type,pattern, and certain ratings for
4、acoustical performance, lightreflectance, and fire safety. It does not cover the aspects ofacoustical ceilings when used as a component of a system orassembly tested for fire endurance or floor/ceiling soundtransmission.1.3 This classification does not include physical properties,such as structural
5、hardness, friability, sag, linear expansion andcontraction, and transverse strength, which may affect thehandling, installation, and use of acoustical ceiling products(see Test Methods C 367).2. Referenced Documents2.1 ASTM Standards:2C 367 Test Methods for Strength Properties of PrefabricatedArchit
6、ectural Acoustical Tile or Lay-In Ceiling PanelsC 423 Test Method for Sound Absorption and Sound Ab-sorption Coefficients by the Reverberation Room MethodC 634 Terminology Relating to Environmental AcousticsE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE 413 Classification
7、for Rating Sound InsulationE 795 Practices for Mounting Test Specimens DuringSound Absorption TestsE 1110 Classification for Determination of ArticulationClassE 1111 Test Method for Measuring the Interzone Attenua-tion of Ceiling SystemsE 1414 Test Method for Airborne Sound Attenuation Be-tween Room
8、s Sharing a Common Ceiling PlenumE 1477 Test Method for Luminous Reflectance Factor ofAcoustical Materials by Use of Integrating-Sphere Reflec-tometers3. Terminology3.1 DefinitionsFor definitions of terms used in this clas-sification, see Terminology C 634.3.2 Definitions of Terms Specific to This S
9、tandard:3.2.1 acoustical panela form of a prefabricated soundabsorbing ceiling element used with exposed suspension sys-tems.3.2.2 acoustical tilea form of a prefabricated sound ab-sorbing ceiling element used with concealed or semi-exposedsuspension systems, stapling, or adhesive bonding.3.2.3 butt
10、a joint detail for acoustical tile, butt bevel, orbutt square edge, without kerfing of the edges, intended foradhesive bonding to solid backing.3.2.4 edge and joint detailvarious edge and joint detailsare available in accordance with Table 1 and Fig. 1 foracoustical ceiling products.3.2.5 excelsiorl
11、ong, thin wood shavings.3.2.6 fissured patterna surface with irregular depressionsof varying lengths, widths, and depths extending below thebasic product face.3.2.7 flush reveal edgeacoustical lay-in panels are in-tended for use in direct hung exposed suspension systems witha narrow exposed edge tha
12、t is flush with the panel face.3.2.8 glass fiber baseceilings composed principally ofglass in fiber form with appropriate binders.3.2.9 kerfed and rabbetedjoint detail for acoustical tile.Tile with kerfed and rabbeted edges on all four sides, with orwithout beveled edges, are intended for concealed
13、suspensionsystem or adhesive bonding.3.2.10 kerfed and rabbeted long edges, ends trimmedacoustical tile, 2 ft or longer, is intended for installation insemi-exposed, or semi-exposed direct hung suspension sys-tems.1This classification is under the jurisdiction of ASTM Committee E33 onEnvironmentalAc
14、oustics and is the direct responsibility of Subcommittee E33.04 onApplication of Acoustical Materials and Systems.Current edition approved April 1, 2005. Published May 2005. Originallyapproved in 1988. Last previous edition approved in 1998 as E 1264 986.2For referenced ASTM standards, visit the AST
15、M website, www.astm.org, orcontact ASTM Customer Service 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, Unite
16、d States.3.2.11 metal facings (pans)metal facing (pan) ceilingsystems with mineral or glass fiber base backings are intendedfor use where sound absorption is needed and where durableand easily maintainable surfaces are a necessity.3.2.12 mineral baseceilings composed principally ofmineral materials
17、such as fibers manufactured from rock orslag, with or without binders.3.2.13 reveal edgeacoustical lay-in panels with step-down edge are intended for use in direct hung exposedsuspension systems.3.2.14 square edgeacoustical lay-in panels with squareedges are intended for use in direct hung exposed s
18、uspensionsystems.3.2.15 DiscussionReveal, flush reveal, and square edgedpanels are laid in place and can easily be pushed upward forremoval or access to the plenum above.3.2.16 textured patterngranular or raised (fine, coarse, ora blend), felted or matted surface as an integral part of the basicprod
19、uct or superimposed on the product surface.3.2.17 tongue and groovejoint detail for acoustical tile.Tile with tongue and groove edges are intended for stapling,concealed suspension system, or adhesive bonding.4. Significance and Use4.1 This classification is used to classify and aid in theselection
20、of acoustical ceiling products.5. Basis of Classification5.1 Acoustical ceiling products described using this classi-fication may be of one or more of the following types, forms,patterns, acoustical ratings, light reflectance values, and fireclasses, as specified.5.2 Ceiling Types:5.2.1 Type ICellul
21、ose base with painted finish.5.2.2 Type IICellulose base with membrane-faced over-lay.5.2.3 Type IIIMineral base with painted finish.5.2.3.1 Form 1Nodular.5.2.3.2 Form 2Water felted.5.2.3.3 Form 3Dry felted.5.2.3.4 Form 4Cast or molded.5.2.4 Type IVMineral base with membrane-faced overlay.5.2.4.1 Fo
22、rm 1Nodular.5.2.4.2 Form 2Water felted.5.2.4.3 Form 3Dry felted.5.2.4.4 Form 4Cast or molded.5.2.5 Type VPerforated steel facing (pan) with mineral orglass fiber base backing.5.2.6 Type VIPerforated stainless steel facing (pan) withmineral or glass fiber base backing.5.2.7 Type VIIPerforated aluminu
23、m facing (pan) withmineral or glass fiber base backing.5.2.8 Type VIIICellulose base with scrubbable pigmentedor clear finish.5.2.9 Type IXMineral base with scrubbable pigmented orclear finish.5.2.9.1 Form 1Nodular.5.2.9.2 Form 2Water felted.5.2.9.3 Form 3Dry felted.5.2.9.4 Form 4Cast or molded.5.2.
24、10 Type XMineral base with plastic or aluminummembrane-faced overlay, or both.5.2.11 Type XIMineral base with fabric-faced overlay.5.2.11.1 Form 1Nodular.5.2.11.2 Form 2Water felted.5.2.11.3 Form 3Dry felted.5.2.11.4 Form 4Cast or molded.5.2.12 Type XIIGlass fiber base with membrane-facedoverlay.5.2
25、.12.1 Form 1Plastic.5.2.12.2 Form 2Cloth.5.2.12.3 Form 3Other.TABLE 1 Edge and Joint Detail, Types I, II, III, IV, VIII, IX, X, XI,and XIIAcoustical Unit Edge Detail Joint DetailTile Beveled Kerfed and Rabbeted or Tongueand Groove or ButtSquare Kerfed and Rabbeted or Tongueand Groove or ButtBeveled
26、Long Edges,Square Edge Trimmed onEndsKerfed and Rabbeted LongEdges Only, Ends Trimmed.(For Semi-concealed System)Panels SquareRevealFlush RevealNarrow RevealNarrow Flush RevealMetal Pan SquareRevealFlush RevealNarrow RevealNarrow Flush RevealMetal Strip Varies with ManufacturerFIG. 1 Edge and Joint
27、DetailsE 1264 98 (2005)25.2.13 Type XIIIAluminum or steel strip with mineral orglass fiber base backing.5.2.13.1 Form 1Perforated.5.2.13.2 Form 2Non-perforated.5.2.14 Type XIVExcelsior bonded with inorganic binders.5.2.14.1 Form 1No backing.5.2.14.2 Form 2Backed with mineral or glass fiber basebacki
28、ng.5.2.15 Type XXOther types (describe).NOTE 1The facings specified in Type II, Type IV, Type X, Type XI,and Type XII shall be separate overlays and not coatings similar to paint.NOTE 2The minimum thickness of metallic facings (pans) specifiedin Type V, Type VI, and Type VII shall be sufficient to s
29、upport the lengthof the facing, or instead thereof, stiffeners or ribs may be provided toensure rigidity.6. Ceiling Pattern6.1 Acoustical ceilings may be one of or a combination oftwo or more of the following patterns:Pattern Designation Pattern DescriptionA Perforated, regularly spaced large holesB
30、 Perforated, randomly spaced large holesC Perforated, small holesD FissuredE Lightly texturedF Heavily texturedG SmoothH PrintedI EmbossedJ Embossed-in-registerK Surface scoredL Random swirlZ Other patterns (describe)7. Ratings7.1 Acoustical Ratingsan acoustical ceiling may meet oneor more of the fo
31、llowing acoustical performance requirements:7.1.1 Noise Reduction Coeffcient (NRC)An acousticalceiling may meet a NRC rating measured in accordance withTest Method C 423. NRC values are to be expressed inincrements of 0.05 as specified by Test Method C 423. Typicalvalues may range from 0.40 to 1.00.
32、7.1.2 Articulation Class (AC)An acoustical ceiling maymeet the minimum AC rating derived in accordance with TestMethod E 1111 and Classification E 1110. AC values are to beexpressed to the nearest multiple of 10 as specified by theClassification E 1110. Typical values may range from 150 to250.NOTE 3
33、Specify AC rating only when rating the acoustical perfor-mance of ceilings designed to accommodate open-plan areas. AC isapplicable for any ceiling material used as part of an acoustically designedsystem incorporating background sound masking and speech privacyspace dividers. AC is the preferred rat
34、ing scheme for selecting ceilingproducts for open-plan in lieu of the NRC rating scheme. (The addition ofhard surfaced elements in the ceiling, such as surface mounted or recessedlighting fixtures can impair the AC rating, depending upon the area of thehard surface and its location relevant to occup
35、ants in the space.)7.1.3 Ceiling Attenuation Class (CAC)An acoustical ceil-ing may meet a CAC rating, derived in accordance with TestMethod E 1414 and Classification E 413. Typical CAC valuesmay range from 5 to 55.NOTE 4Ceiling Attenuation Class (CAC) is a single number ratingobtained according to T
36、est Method E 1414 and Classification E 413. TheNormalized Ceiling Attenuation (Dn,c) values, obtained according toE 1414 are used instead of Transmission Loss (TL) values in Classifica-tion E 413. Test Method E 1414 is a two-room method of test in which asuspended ceiling and common plenum space ove
37、rlay a two-room suiteseparated by a massive dividing wall. Sound must travel up through thesource room ceiling, across the plenum, and down through the receiveroom ceiling. Modifications to the plenum space such as overlays andbarriers must be specified. STC ratings obtained from Test Method E 90 or
38、E 336 data are not acceptable.7.2 Light Reflectance (LR) CoeffcientAn acoustical ceil-ing may meet a LR coefficient, measured in accordance withTest Method E 1477. Typical values may range from 0.60 to0.80.7.3 Fire Class/Surface Burning CharacteristicsAcoustical ceiling products may be classified by
39、 flame spreadand smoke developed indexes, tested in accordance with TestMethod E84, as follows:7.3.1 Class AThe flame spread rating of Class A ceilingproducts shall not exceed 25, nor shall the material showevidence of continued progressive combustion after the testflame has been extinguished. All s
40、urfaces, including those thatwould be exposed by cutting through the material in any way,shall meet these requirements. In addition, Class A ceilingproducts shall have a smoke developed rating not to exceed 50.7.3.2 Class BThe flame spread of Class B ceiling prod-ucts shall not exceed 75 on the face
41、 side.7.3.3 Class CThe flame spread of Class C Ceiling prod-ucts shall not exceed 200 on the face side.NOTE 5Classes A, B, and C are equivalent, respectively, to Classes I,II, and III of various building code authorities.8. Test Methods8.1 Acoustical Performance Ratings:8.1.1 Noise Reduction Coeffci
42、ent (NRC)Test according toTest Method C 423 using Type E-400 mounting as defined inPractices E 795 unless special means of installation are re-quired. Special means of installation shall be explicitly noted intest reports and in publications of test data.NOTE 6Plenum: The depth of air space has cons
43、iderable effect onNRC using mechanically mounted acoustical tiles and panels. Becausethere are unlimited variations that are possible, it has been established thatPractices E 795 mounting Type E-400 (formerly AMA Mounting No. 7) ismost consistent with normal usage and existing technology of testing.
44、Some manufacturers publish data for depths of mountings other than 400mm, designated by an E, followed by numbers which indicate themounting depth in millimeters. For selecting NRC for mechanicallymounted acoustical tiles and panels, mounting Type E-400 is preferred. Ifa plenum will not be used, a r
45、eport of how the product performs with theappropriate mounting should be obtained.8.1.2 Articulation Class (AC)Test according to TestMethod E 1111 and determine AC rating according to Classi-fication E 1110, subject to the following:8.1.2.1 The reported AC rating shall be the minimumarticulation cla
46、ss as defined in Test Method E 1111.8.1.2.2 The ceiling to be tested shall be installed as normallyused with its recommended means of installation, no less than8 ft and no more than 9 ft above the floor, or as otherwisespecified and explicitly noted in test reports and in publicationsof test data.E
47、1264 98 (2005)38.1.2.3 The plenum depth measured from the specimensurface to the underside of the deck above shall be 2 ft, 6 in.unless specified otherwise. The extended surface of the under-side of the deck shall be acoustically hard.8.1.3 Ceiling Attenuation Class (CAC)Test according toTest Method
48、 E 1414 and determine CAC rating according toClassification E 413. Special plenum details or additions shallbe explicitly noted in test reports and publications of test data.8.2 Light Reflectance (LR) CoeffcientTest according toTest Method E 1477.8.3 Fire ClassTest according to Test Method E84.9. Fo
49、rmat of Classification9.1 The ceiling classification shall conform to the followingformat:9.1.1 Type Form; Pattern; NRC or AC (specify); CAC;LR; Fire Class.NOTE 7For example, a lightly textured, water felted mineral baseceiling with painted finish, having an NRC 0.65, AC 180, CAC 42, LR0.75, and a flame spread rating of 50 would be designated as either:Type III, Form 2; Pattern E; NRC 0.65; CAC 42; LR 0.75; Fire ClassB, orType III, Form 2; Pattern E; AC 180; CAC 42; LR 0.75; Fire Class B.10. Keywords
