1、Designation:C20812Standard Specification forCellulosic Fiber Insulating Board1This standard is issued under the fixed designation C208;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses
2、indicates the year of last reapproval.Asuperscript epsilon()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 specification covers the principal cellulosic fiberinsulating board types,g
3、rades,and sizes.Requirements arespecified for composition,construction,physical properties,tolerances,sampling procedures,and test methods.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided
4、 for information onlyand are not considered standard.1.3 When the installation or use of thermal insulationmaterials,accessories,and systems may pose safety or healthproblems,the manufacturer shall provide the user appropriatecurrent information regarding any known problems associatedwith the recomm
5、ended use of the companys products and shallalso recommend protective measures to be employed in theirsafe utilization.The user shall establish appropriate safety andhealth practices and determine the applicability of regulatoryrequirements prior to use.2.Referenced Documents2.1 ASTM Standards:2C165
6、 Test Method for Measuring Compressive Properties ofThermal InsulationsC168 Terminology Relating to Thermal InsulationC209 Test Methods for Cellulosic Fiber Insulating BoardC390 Practice for Sampling and Acceptance of ThermalInsulation LotsC846 Practice for Application of Cellulosic Fiber Insulating
7、Board for Wall SheathingD1037 Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel MaterialsD1554 Terminology Relating to Wood-Base Fiber and Par-ticle Panel MaterialsD2164 Methods of Testing Structural Insulating Roof Deck(Withdrawn 2005)3E72 Test Methods of Conducting Stren
8、gth Tests of Panelsfor Building Construction2.2 Federal Standard:4900.1 Rev-1 U.S.Dept.of Housing and Urban Develop-ment Minimum Property Standards,One and Two FamilyDwellings43.Terminology3.1 For definitions of terms used in this specification,seeTerminology C168 and Definitions D1554.3.2 Definitio
9、ns of Terms Specific to This Standard:3.2.1 cellulosic fiber insulating boarda fibrous-felted,ho-mogeneous panel made from ligno-cellulosic fibers(usuallywood)and having a density of less than 31 lb/ft3(497 kg/m3)but more than 10 lb/ft3(160 kg/m3).3.2.1.1 DiscussionCellulosic fiber insulating board
10、ischaracterized by an integral bond which is produced byinterfelting of the fibers,but which has not been consolidatedunder heat and pressure as a separate stage in manufacture.Other materials may be added during manufacture to improvecertain properties.4.Classification4.1 Insulating board covered b
11、y this specification consists ofsix types:4.1.1 Type ISound deadening board,for use in wallassemblies to control sound transmissions.4.1.2 Type IIRoof insulation board,for use in variousroofing systems.4.1.2.1 Grade 1Primarily for use under built-up,andmodified bitumen roof systems.4.1.2.2 Grade 2Pr
12、imarily for use under single-ply,built-up,and modified bitumen roofing systems.4.1.3 Type IIICeiling tiles and panels.1This specification is under the jurisdiction of ASTM Committee C16 onThermal Insulation and is the direct responsibility of Subcommittee C16.22 onOrganic and Nonhomogeneous Inorgani
13、c Thermal Insulations.Current edition approved Sept.1,2012.Published October 2012.Originallyapproved in 1946.Last previous edition approved in 2008 as C208 08a.DOI:10.1520/C0208-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.F
14、or Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from the U.S.Department of Housing and Urban Development,Construction Standards Division,H
15、UD Building,Washington,DC 20410.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.1.3.1 Grade 1Nonacoustical,for use as decorative walland ceiling coverings.4.1.3.2 Grade 2Acoustical,for use as decorative,soundabsorbing wall and ceiling c
16、overings.4.1.4 Type IVWall Sheathing.4.1.4.1 Grade 1Regular,for use as wall sheathing inframe construction.4.1.4.2 Grade 2Structural,for use as wall sheathing inframe construction.When installed in accordance with PracticeC846,structural wall sheathing provides adequate rackingresistance for use as exterior wall bracing.4.1.5 Type VBacker board,for use behind exterior finishin wall assemblies where there are no structural requirements.4.1.6 Type VIRoof deck,for use as roof decking for flat,pitch