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ASTM C840 PDF

ASTM C Standard Specification for Application and Finishing of Gypsum Board. ASTM C or GA provides the following requirements for installing control joints in gypsum board assemblies: Section (GA & GA. This specification covers requirements for the methods of application and finishing of gypsum board. Construction details for a specific assembly to achieve the.

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Construction details for a specific assembly to achieve the required fire resistance shall be obtained from reports of fire-resistance tests, engineering evaluations, or listings from recognized fire testing laboratories.

Control joints should be installed where ceiling framing or furring changes direction. The requirement for control joints is addressed in both of these documents. Where gypsum board is stored outside, it shall be off the ground, properly supported on a level platform and fully protected from the weather or direct sunlight exposure.

Architects sometimes fail to specify control joints. In some cases when control joints are specified, the drawings are not coordinated with the specifications and the control joint details are frequently missed. ASTM does sstm give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

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This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. This specification covers requirements for the methods of application and finishing of gypsum board.

These details are based on Warnock Hersey International, Inc.

Masonry or concrete walls shall be dry, free of dust, oil, or form release agents, protrusions or voids, or foreign matter that inhibit bond for adhesively applied gypsum board. Download NGC app from your smartphone. Control joints are required in ceilings to limit areas to 2, square feet. A fire test of assemblies shall be conducted to determine adtm fire resistance rating required for gypsum board assembly.

For specific precautionary statements, see 4. All materials shall be kept dry. Isolation joints should be installed where structural elements such as slabs, columns or exterior walls can bear directly on non-load bearing partitions. To relieve the stresses that occur as a result of such movement, control joints are required in both partitions and ceilings.

Materials categorized under this specification include: Gypsum board assembly shall conform to acoustical tests of the specification where sound control is required.

ASTM C 840—08 Specification for Application and Finishing of Gypsum Board (PDF Download)

Use on a local area network or other network is not permitted. The PDF Download is licensed per individual in which the individual can place on up to four electronic devices for their personal use. Control joints are recommended at doorjambs, extending from door head to ceiling.

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Gypsum board shall be cut by scoring and breaking or by sawing, working from the face side. One component of gypsum board construction often overlooked by architects and contractors is the control joint.

Materials categorized under this specification include: JavaScript seems to be disabled axtm your browser. Construction details for a specific assembly to achieve the required fire resistance shall be obtained from reports of fire-resistance tests, engineering evaluations, or listings from recognized fire testing laboratories. Historical Version s – view previous versions of standard. A fire test of assemblies shall be conducted to determine a fire resistance rating required for gypsum board assembly.

Application of Vinyl Faced C8400 Board. Cracking may also be caused by stresses resulting from building movement.

ASTM C – 18b Standard Specification for Application and Finishing of Gypsum Board

All materials shall be kept dry. Semi-solid Gypsum Board Partitions. Work Item s – proposed revisions of this standard.