ASTM_C_1278_-_C_1278M_-_17.pdf

Designation:C1278/C1278M17Standard Specification forFiber-Reinforced Gypsum Panel1This standard is issued under the fixed designation C1278/C1278M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers fiber-reinforced gypsum pan-els described in 1.1.1 1.1.4.1.1.1 Interior Fiber-Reinforced Gypsum Panels are de-signed to be used for walls,ceilings,or partitions and affordsa suitable surface to receive decoration.1.1.2 Water-Resistant Fiber-Reinforced Gypsum BackingPanels are designed primarily to be used as a base for theapplication of ceramic or plastic tile on walls or ceilings.Thisproduct is also suitable for decoration.1.1.3 Exterior Fiber-Reinforced Gypsum Sofft Panels aredesigned for use on exterior soffits and carport ceilings that arecompletely protected from contact with liquid water.1.1.4 Water-Resistant Exterior Fiber-Reinforced GypsumSheathing Panels are designed for use as sheathing on build-ings.1.1.5 Interior Fiber-Reinforced Gypsum UnderlaymentPanels are designed for use as a base for application of finishedflooring materials.1.1.6 Fiber-Reinforced Gypsum Board Panels are designedfor use in roofing systems.1.2 Specifications applicable to all fiber-reinforced gypsumpanels are located in Sections 1 4 and 11 13 except asmodified by applicable product sections.Specifications appli-cable to specific panels are located in the following sections:Interior Fiber-Reinforced Gypsum Panels5Water-Resistant Fiber-Reinforced Gypsum Backing Panels6Exterior Fiber-Reinforced Gypsum Soffit Panels7Water-Resistant Exterior Fiber-Reinforced Gypsum SheathingPanels8Interior Fiber-Reinforced Gypsum Underlayment Panels9Fiber-Reinforced Gypsum Roof Board Panels101.3 The values stated in either inch-pound units or SI(metric)are to be regarded separately as the standard.Withinthe text,the SI units are shown in brackets.The values statedin each system shall be used independently of the other.Valuesfrom the two systems shall not be combined.1.4 The text of this specification references notes andfootnotes that provide explanatory material.These notes andfootnotes shall not be considered as requirements of thestandard.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:2C11 Terminology Relating to Gypsum and Related BuildingMaterials and SystemsC22/C22M Specification for GypsumC473 Test Methods for Physical Testing of Gypsum PanelProductsC645 Specification for Nonstructural Steel Framing Mem-bersC1264 Specification for Sampling,Inspection,Rejection,Certification,Packaging,Marking,Shipping,Handling,and Storage of Gypsum Panel ProductsD1037 Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel MaterialsD3273 Test Method for Resistance to Growth of Mold on theSurface of Interior Coatings in an Environmental Cham-berE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE96/E96M Test Methods for Water Vapor Transmission ofMaterialsE119 Test Methods for Fire Tests of Building Constructionand Materials3.Terminology3.1 DefinitionsDefinitions of terms shall be in accordancewith Terminology C11.1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.Current edition approved May 1,2017.Published May 2017.Originallyapproved in 1994.Last previous edition approved in 2015 as C1278/C1278M 07a(2015).DOI:10.1520/C1278_C1278M-17.2For 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.*A Summary of Changes section appears at the end of this standardCopyright 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 3.1.1 nominal thickness,nthe manufacturer-stated frac-tional value of thickness of the gypsum panel product ex-pressed in decimal value to the nearest one-thousandth(0.001)of an inch.4.Materials and Manufacture4.1 Fiber-rei