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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Even if control joints do not appear to be specified they are often covered by reference specification. Link to Active This link will always route to the current Active version of the standard.

Work Item s – proposed revisions of this standard. To relieve the stresses that occur as a result of such movement, control joints are required in both partitions and ceilings. This specification covers requirements for the methods of application and finishing of gypsum board. A fire test of assemblies shall be conducted to determine a fire resistance rating required for gypsum board assembly.

Historical Version s f840 view previous versions of standard.

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

Materials categorized under this specification include: Gypsum board assembly shall conform to acoustical tests of the specification where sound control is required. Use on a local area network or other network is not permitted. These details are based on Warnock Hersey International, Inc. Isolation joints should be installed where structural elements such as slabs, columns or exterior walls can bear directly on non-load bearing partitions. 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.

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Gypsum board assembly shall conform to acoustical tests of the specification where sound control is required. 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 employed in long expanses of partitions at foot intervals, from floor to ceiling.

National Gypsum Company, Drywall, Cement Board, Gypsum Board, Finishing Products

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. Gypsum wallboard, as well as other building products and materials, is subject to some form of movement induced by changes in moisture, temperature or both.

We recommend users of early versions of Internet Explorer to update to Version 10 or later. One component of gypsum board construction often overlooked by architects and contractors is the control joint. Distribution of the PDF is not permitted.

Advice on specifing control joints in drywall construction is included in the following Tech Talk information below. Moreover, gypsum assembly shall conform to framing size, fasteners spacing, ventilation, substrate, surface preparation, cutting, and installation application as indicated in the specification.

Where gypsum board is stored outside, it shall be off the ground, asstm supported on a level platform and fully protected from the weather or direct sunlight exposure.

Control joints should be installed where ceiling framing sstm furring changes direction. All materials shall be kept dry. For specific precautionary statements, see 4. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the specification. Moreover, gypsum assembly shall conform to framing size, fasteners spacing, ventilation, atm, surface preparation, cutting, and installation application as indicated in the specification.

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Materials categorized under this specification include: 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. The PDF Download is licensed per individual in which the individual can place on up to four electronic devices for their personal use.

Wstm some c480 when control joints are specified, the drawings are not coordinated with the specifications and the control joint details are frequently missed. 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.

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

Control joints are recommended at doorjambs, extending from door head to ceiling. When “through wall” control joints are required in fire-rated assemblies, special details See drawing are necessary. Application of Vinyl Faced Gypsum Board. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. For a volume license the PDF is licensed to the person in which it is assigned. This abstract is a brief summary of the referenced standard.

Gypsum board shall be cut by scoring and breaking or by sawing, working from the face side. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.