ASTM C840 PDF

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

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

Materials categorized under this specification include: Where asym extend from floor to ceiling and are spaced less than 30 feet apart, no control joints are required. Historical Version s – view previous versions of standard.

Even if control joints do not appear to be specified they are often covered by reference specification.

Materials categorized under this specification include: 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. Control joints are recommended at doorjambs, extending from door head to ceiling. To relieve the stresses that occur as a result of such movement, control joints are required in both partitions and ceilings. All materials shall be kept dry. In some cases when control joints are specified, the drawings are not coordinated with the specifications and the control joint details are frequently missed.

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Application of Vinyl Faced Gypsum Board. This abstract is a brief summary of the referenced standard. astk

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. This standard does not purport to address all of the safety concerns, if any, associated with its use. For specific precautionary statements, see 4. One component of gypsum board construction often overlooked by architects and contractors is the control joint.

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. 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.

Control joints are frequently necessary to prevent cracking in gypsum wallboard. Semi-solid Gypsum Board 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. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

Awtm joints should be installed where ceiling framing or furring changes direction. Construction details for a specific assembly to achieve the required fire resistance shall be obtained from reports of fire-resistance tests, engineering evaluations, or c80 from recognized fire testing laboratories. Even in the best of circumstances, when control joints have been specified and properly detailed, estimators may neglect to include them in the bid, and project managers are faced with managing a job with unforeseen costs.

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

The PDF Download is licensed per individual in which the individual can place on up to four electronic devices for their personal use. Gypsum board shall be cut by scoring and breaking or by satm, working from the face side. A fire test of assemblies shall be conducted to determine a fire resistance rating required for gypsum board assembly. Use on a local area network or other network is not permitted. Work Item s – proposed revisions of this standard.

Isolation joints should be installed where structural elements such as slabs, columns or exterior walls can bear directly on non-load bearing partitions. Additionally, control joints should be installed in ceilings to limit dimensions in either direction to 50 feet.

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

Advice on specifing control joints in drywall construction is included in the following Tech Talk information below. 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.

Moreover, gypsum assembly shall conform to framing size, fasteners spacing, ventilation, substrate, surface preparation, cutting, and installation application as indicated in the specification. Control joints should be employed in long expanses of partitions at foot intervals, from floor to ceiling.