1、Designation: C 840 07Standard Specification forApplication and Finishing of Gypsum Board1This standard is issued under the fixed designation C 840; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number
2、 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. Scope*1.1 This specification covers the minimum requirements forthe
3、methods of application and finishing of gypsum board,including related items and accessories.1.2 Details of construction for a specific assembly toachieve the required fire resistance shall be obtained fromreports of fire-resistance tests, engineering evaluations, orlistings from recognized fire tes
4、ting laboratories.1.2.1 Where this specification is more stringent (size orthickness of framing: size and spacing of fasteners) than thefire-rated construction, this specification shall govern.1.3 Where sound control is required for a gypsum boardassembly, details of construction shall be in accorda
5、nce withreports of acoustical tests of assemblies that have met therequired acoustical values.1.4 Unheated spaces above gypsum board ceilings shall beproperly ventilated (seeAppendix X2).1.5 The various application systems are located in thefollowing sections:I Application of Single-Ply Gypsum Board
6、 to Wood FramingMembers8II Application of Two-Ply Gypsum Board to Wood FramingMembers9III Application of Gypsum Board by Adhesive Nail-On toWood Framing Members10IV Semi-Solid Gypsum Board Partitions 11V Solid Gypsum Board Partitions 12VI Application of Gypsum Board with Adhesives to InteriorMasonry
7、 or Concrete Walls13VII Application of Gypsum Board to Rigid Foam Insulation 14VIII Application of Gypsum Board to Steel Framing and Furring 15IX Arches and Bending Radii 16X Application of Gypsum Board to Receive Tile byAdhesive Application17XI Exterior Application of Gypsum Wallboard andExterior G
8、ypsum Soffit Board18XII Floating Interior Angles 19XIII Control (Expansion) Joints 20XIV Foil-Backed Gypsum Board 21The values stated in inch-pound units are to be regarded asthe standard. The SI (metric) values given in parentheses areapproximate and are provided for information purposes only.1.6 T
9、he text of this specification references notes andfootnotes which provide explanatory material. These notes andfootnotes (excluding those in tables and figures) shall not beconsidered as requirements of the specification.1.7 The following precautionary caveat pertains only toSections 6-24. This stan
10、dard does not purport to address all ofthe safety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.7.1 For specific precautio
11、nary statements, see 4.1.1, 4.1.2,and 22.5.2. Referenced Documents2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related Build-ing Materials and SystemsC 475/C 475M Specification for Joint Compound and JointTape for Finishing Gypsum BoardC 514 Specification for Nails for the Application
12、of Gyp-sum BoardC 557 Specification for Adhesives for Fastening GypsumWallboard to Wood FramingC 645 Specification for Nonstructural Steel Framing Mem-bersC 754 Specification for Installation of Steel Framing Mem-bers to Receive Screw-Attached Gypsum Panel ProductsC 920 Specification for Elastomeric
13、 Joint SealantsC 954 Specification for Steel Drill Screws for the Applica-tion of Gypsum Panel Products or Metal Plaster Bases toSteel Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84mm) in ThicknessC 1002 Specification for Steel Self-Piercing TappingScrews for the Application of Gypsum Panel Produ
14、cts orMetal Plaster Bases to Wood Studs or Steel Studs1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.03 on Specifications for theApplication of Gypsum and OtherProducts in Ass
15、emblies.Current edition approved Jan. 1, 2007. Published February 2007. Originallyapproved in 1979. Last previous edition approved in 2006 as C 840 06.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStan
16、dards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.C 1007 Specification for Inst
17、allation of Load Bearing(Transverse and Axial) Steel Studs and Related Accesso-riesC 1047 Specification for Accessories for Gypsum Wall-board and Gypsum Veneer BaseC 1396/C 1396M Specification for Gypsum BoardC 1546 Guide for Installation of Gypsum Products in Con-cealed Radiant Ceiling Heating Syst
18、ems2.2 U.S. Department of Commerce Publication:PS20 American Softwood Lumber Standard32.3 ANSI Standard:ANSI A 136.1 Organic Adhesives for Installation of Ce-ramic Tile, Type I and Type II43. Terminology3.1 DefinitionsDefinitions shall be in accordance withTerminology C11.3.2 Descriptions of Terms S
19、pecific to This Standard:3.2.1 all-purpose compound, na compound formulatedand manufactured to serve as a taping or finishing compound,or both.3.2.2 critical lighting, na condition where interior sur-faces are flooded by natural or artificial lighting at an obliqueangle.3.2.3 decoration, npaint (inc
20、luding primers), texture,coatings, and coverings such as wallpaper and sheet plasticmaterials designed to conceal or protect the surface of thegypsum board (see Appendix X3).3.2.4 dry type, na compound in powder form to be mixedwith water before use.3.2.5 drying type, na compound that hardens by the
21、evaporation of the vehicle used to make the paste.3.2.6 drywall primer, na paint material specifically for-mulated to fill the pores and minimize the suction differencebetween gypsum board surface paper and the compound usedon finished joints, angles, fastener heads and accessories, andover skim coa
22、tings.3.2.7 face panel, noutside ply of multiple layer gypsumboard assemblies.3.2.8 finished wallboard, nwallboard that has had thejoints taped, has had the joints, fastener heads, and flanges ofaccessories concealed with joint compound, and has beensanded to prepare the surface to receive job appli
23、ed decoration.3.2.9 finishing, nthe preparation of gypsum board sur-faces to receive the field application of decoration.3.2.10 finishing compound (sometimes called topping com-pound), na compound used for successive coats over thetaping or all-purpose compound that provides a smooth andlevel surfac
24、e for the application of decoration.3.2.11 finishing of accessories, nthe application of com-pound to flanges of accessories to create a monolithic surface.3.2.12 flange, nthat part of an accessory extending overthe face of the gypsum wallboard intended to become a part ofthe monolithic plane of the
25、 prepared surface.3.2.13 framing member, nthat portion of the framing,furring, and blocking to which the gypsum board is attached.3.2.14 harden, va condition reached when the compoundhas lost its plasticity to an arbitrary degree, measured inresistance to penetration or deformation.3.2.15 joint phot
26、ographing, na condition where the fin-ished joint areas visible after final decoration.3.2.16 joint tape, na strip of material designed to beembedded in compound to reinforce joints, cracks, or othersmall openings in or between gypsum boards.3.2.17 joint treatment, napplication of joint tape andcomp
27、ound to the joint between gypsum boards.3.2.18 laminating compound, na compound (abrasive)used to adhere gypsum board to gypsum board or othermonolithic materials.3.2.19 moderate contact, nthe edges and ends are buttedat joints but not forced together.3.2.19.1 DiscussionSmall gaps not greater than14
28、 in. (6mm) are acceptable (see 7.4)3.2.20 parallel or vertical application, ngypsum boardapplied with the edges parallel to the framing member to whichit is attached.3.2.21 perpendicular or horizontal application, ngypsumboard application with the edges applied at right angles to theframing member t
29、o which it is attached.3.2.22 ready-mix type, na factory-prepared compoundready to be used without the addition of water.3.2.23 required, adjpertaining to a mandatory obligationimposed by a force outside this standard, such as a buildingcode, project specification, contract, or purchase order.3.2.24
30、 setting type, na compound that hardens by achemical reaction and increases in straight through drying.3.2.25 skim coat, na thin layer of skim coat compoundapplied over the entire surface of finished gypsum board.3.2.25.1 DiscussionA skim coat is essentially a film ofjoint compound and is not applie
31、d at a readily measurablethickness. There is no specific mil thickness that constitutes aproper skim coat (See Appendix X8).3.2.26 skim coat compound, njoint compound, or a ma-terial specifically formulated and manufactured for use as askim coat.3.2.27 specified, adjpertaining to a mandatory require
32、-ment of this standard or a referenced requirement (see 3.2.21).3.2.28 spotting fastener heads, nthe application of com-pound to cover the fastener head to create a monolithic surface.3.2.29 taping compound (sometimes called embedding com-pound), na compound used for embedding and bonding jointtape
33、and for the first coat over the heads of fasteners andflanges of accessories.3.2.30 taping of joints, nthe application of compound andjoint reinforcing tape to the joints between adjoining gypsumboards.3.2.31 treated joint, na joint between gypsum boards thathas been covered with joint tape and join
34、t compound asspecified in 22.3.3.1, 22.3.3.2,or22.3.3.3.3.2.31.1 DiscussionStrip moldings or similar devicesshall be permitted.3Available from U.S. Government Printing Office, Washington, DC 20402.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10
35、036.C8400724. Environmental Conditions4.1 Application of Gypsum Board, Joint Treatment Materi-als, and AdhesivesRoom temperature shall be maintained atnot less than 40 F (4 C) during application of gypsum boardexcept when adhesive is used for the attachment of gypsumboard. For the bonding of adhesiv
36、e, joint treatment, texturing,and decoration, the room temperature shall be maintained atnot less than 50 F (10 C) for 48 h prior to application andcontinuously thereafter until completely dry.4.1.1 When a temporary heat source is used, the temperatureshall not exceed 95 F (35 C) in any given room o
37、r area.4.1.2 Adequate ventilation shall be maintained in the work-ing area during installation and curing period.4.2 Gypsum board shall be protected from direct exposureto rain, snow, sunlight, or other excessive weather conditions.NOTE 1Where manufacturers recommendations differ from theabove, foll
38、ow their recommendations.4.3 Ready-mixed joint compounds shall be protected fromfreezing, exposure to extreme heat, and direct sunlight.5. Materials and Manufacture5.1 Gypsum BoardsAfamily of gypsum sheet products asdefined in Terminology C11.5.1.1 Type X (Special Fire-Resistant) Gypsum Wallboard,Gy
39、psum Backing Board, Water-Resistant Gypsum BackingBoard, or Exterior Gypsum Sofft BoardGypsum board thatprovides a greater degree of fire resistance than regular gypsumboard as defined in Specification C 1396/C 1396M.5.1.2 Foil-Backed Gypsum Wallboard or Gypsum BackingBoardRegular or Type X gypsum b
40、oard with foil laminatedto the back surface. The foil is a vapor retarder.5.1.3 Predecorated Gypsum BoardGypsum board with adecorative wall covering or coating applied in-plant by thegypsum board manufacturer.5.2 Gypsum Wallboard See Specification C 1396/C 1396M.5.3 Gypsum Backing Board and Coreboar
41、dSee Specifi-cation C 1396/C 1396M.5.4 Water-Resistant Gypsum Backing BoardSee Specifi-cation C 1396/C 1396M.5.5 Exterior Gypsum Sofft BoardSee SpecificationC 1396/C 1396M.5.6 Gypsum Ceiling BoardSee Specification C 1396/C 1396M.5.7 Finishing Materials:5.7.1 CompoundsTaping compound, finishing compo
42、und,and all-purpose compound shall meet the requirements ofSpecification C 475/C 475M.5.7.2 Mix compounds in accordance with the manufactur-ers directions.5.7.3 Joint TapeSee Specification C 475/C 475M.5.8 Fasteners:5.8.1 NailsSee Specification C 514.5.8.2 Screws:5.8.2.1 See Specification C 1002 for
43、 screws for fasteninggypsum board to wood members, steel members less than 0.03in thickness, and to gypsum board.5.8.2.2 See Specification C 754 and Specification C 954 forscrews for fastening gypsum board to steel members from0.033 to 0.112 in. in thickness.5.8.3 StaplesNo. 16 USS gage flattened ga
44、lvanized wirestaples with716-in. (11.1-mm) wide crown outside measure-ment. Legs shall have divergent points.NOTE 2Use only for the base ply of two-ply gypsum board applica-tion.5.9 Adhesives:5.9.1 Fastening Gypsum Board to Wood FramingSeeSpecification C 557.5.9.2 Fastening Gypsum Board to Steel Fra
45、mingAsspecified by the manufacturer.5.9.3 Laminating Gypsum Board to Gypsum BoardLaminating compounds, taping compound, or adhesive shall beas specified by the manufacturer.NOTE 3Adhesives for the installation of ceramic tile, see AppendixX4.5.10 Framing Members:5.10.1 Wood framing members shall con
46、form to PS20,American Softwood Lumber Standards. The surface to whichabutting edges or ends are attached shall be not less than 112in. (38.1 mm) wide. For internal corners or angles, the bearingsurface shall not be less than34 in. (19.1 mm).5.10.2 Steel Studs, Furring Channels, and Runners, Non-Load
47、 BearingSee Specification C 645.5.10.3 Gypsum Studs Specification C 1396/C 1396M, notless than 1 in. (25.4 mm) thick by 6 in. (152 mm) wide. Studsshall be either solid or laminated.5.11 AccessoriesSee Specification C 1047.5.12 WaterWater shall be clean, fresh, and potable (suit-able for domestic con
48、sumption).5.13 Face PanelsFace panels shall be12 in. (12.7 mm),58in. (15.9 mm), or multiple laminations of regular or Type Xgypsum board.5.14 Core BoardCore board shall be34 in. (19.1 mm) or1 in. (25.4 mm) either single thickness or multiple layers to therequired thickness.6. Substrate, Surface Prep
49、aration6.1 The attachment surface of any framing member shall notvary more than18 in. (3.2 mm) from the plane of the faces ofadjacent framing members.6.2 Wood framing shall be as straight and true as possible.Wood framing shall be securely attached following acceptableengineering practices and as required for the intended design.NOTE 4For installation of wood framing, see Appendix X5.6.3 Metal framing members shall be of the proper size anddesign for their intended use and shall be installed in accor-dance
