ASTM_C_919_-_19.pdf

Designation:C91919Standard Practice forUse of Sealants in Acoustical Applications1This standard is issued under the fixed designation C919;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 indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice provides information for the use of seal-ants to reduce sound transmission characteristics of interiorwalls,ceilings,and floors by proper application of sealants tojoints,voids,and penetrations normally found in buildingconstruction,which are commonly referred to as“flankingpaths.”1.2 The committee with jurisdiction over this standard is notaware of any comparable standards published by other orga-nizations.1.3 This standard does not purport to address fire stoppingor safing requirements for joints,voids,and penetrationsthrough fire-rated wall,ceiling,and floor assemblies.Addi-tional requirements may be necessary for fire-rated assembliesto meet the applicable building code provisions.1.4 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 safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C634 Terminology Relating to Building and EnvironmentalAcousticsC717 Terminology of Building Seals and SealantsC834 Specification for Latex SealantsC920 Specification for Elastomeric Joint SealantsC1193 Guide for Use of Joint SealantsC1520 Guide for Paintability of Latex SealantsC1620 Specification for Aerosol Polyurethane and AerosolLatex Foam SealantsC1642 Practice for Determining Air Leakage Rates of Aero-sol Foam Sealants and Other Construction Joint Fill andInsulation MaterialsC1852 Guide for Product Selection/Delivery Systems forAerosol Foam Sealants and AdhesivesE90 Test Method for Laboratory Measurement of AirborneSound Transmission Loss of Building Partitions andElementsE336 Test Method for Measurement of Airborne SoundAttenuation between Rooms in BuildingsE413 Classification for Rating Sound Insulation2.2 HUD Standard:3HUD Minimum Property Standards for Housing,Section4910.12.3 IBC Standard:4International Building Code(IBC),Section 12063.Terminology3.1 DefinitionsFor definitions of terms used in this rec-ommended practice,see Terminologies C717 and C634.4.Significance and Use4.1 Walls,ceilings,and floors in building construction,especially those that are of lightweight construction,and thatare designed to reduce or limit sound transmission,can haveundesirable sound transmission characteristics if care is nottaken to seal joints,voids,and penetrations that typically occur.Unsealed joints,voids,and penetrations will substantiallyincrease the sound transmission characteristics of these typesof construction.By sealing them the transmission of sound canbe substantially diminished by eliminating“flanking paths.”5.Sound Transmission Requirements5.1 The construction industry has adopted Sound Transmis-sion Class(STC)units,as defined in Terminology C634,to rate1This practice is under the jurisdiction of ASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.10 onSpecifications,Guides and Practices.Current edition approved May 1,2019.Published June 2019.Originallyapproved in 1979.Last previous edition approved in 2018 as C919 18.DOI:10.1520/C0919-19.2For 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 Summary page onthe ASTM website.3Available from Superintendent of Documents,U.S.Government PrintingOffice.4Available from International Code Council(ICC).Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 the sound transmission properties of walls,ceilings,and floors.The STC is determined in accordance with Classification E413.The test data are obtained in accordance with Test MethodsE90 and E336.5.2 Various building and other governmental adopted codesinclude requirements for s