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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Link to Active This link will always route to the current Active version of the standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but 8c40 not provided as part of the standard. For a volume license the PDF is licensed to the person in which it is assigned.

Materials categorized under this specification include: You must have JavaScript enabled in satm browser to utilize the functionality of this website. A fire test of assemblies shall be conducted to determine a fire resistance rating required for gypsum board assembly. For specific precautionary statements, see 4. When “through wall” control joints are required in fire-rated assemblies, special details See drawing are necessary.

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

The PDF Download is licensed per individual in which the individual can asgm on up to four electronic devices for their personal use. 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.

To relieve the stresses that occur as a result of such movement, control joints are required in both partitions and ceilings.

Distribution of the PDF is not permitted. These details are based on Warnock Hersey International, Inc. Control joints are frequently necessary to prevent cracking in gypsum wallboard. Application of Vinyl Faced 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.

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Download NGC app from your smartphone. 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 requirement for control joints is addressed in both of these documents.

A fire test of assemblies shall be conducted to determine a fire resistance rating required for astn board assembly. Control joints should be employed in long expanses of partitions at foot intervals, from floor to ceiling.

Moreover, gypsum assembly shall conform to framing size, fasteners spacing, ventilation, substrate, surface preparation, cutting, and installation application as indicated in the specification. JavaScript seems to be disabled in your browser. One component of gypsum board construction often overlooked by architects and contractors is the control joint. All materials shall be kept dry.

This specification covers requirements for the methods of application and finishing of gypsum board.

This option is mobile friendly and compatible with all devices, including mobile tablets and smart phones. Moreover, gypsum assembly shall asstm to framing size, fasteners spacing, ventilation, substrate, surface preparation, cutting, and installation application as indicated in the specification.

Isolation joints should be installed where structural elements such as slabs, columns or exterior walls can bear directly on non-load bearing partitions.

It is informational only and aetm an official part of the standard; the full text of the standard itself must be referred to for its use and application.

Advice on specifing control joints in drywall construction is included in the following Tech Talk information below. 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. This standard does not purport to address all of the safety concerns, if any, associated with its use.

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Architects sometimes fail to specify control joints.

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 ashm applied gypsum board. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Even if control joints do not appear to be specified they are often covered by reference specification.

Where doorjambs extend from floor to ceiling and are spaced less than 30 feet apart, no control joints are required. All materials shall be kept dry. Semi-solid Gypsum Board Partitions.

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

These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the specification. Use on a local area network or other network is not permitted. Additionally, control joints should be installed in ceilings to limit dimensions in either direction to 50 feet. 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.

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 board shall be cut by scoring and breaking or by sawing, working from the face side. Materials categorized under this specification include: Control joints should be installed where ceiling framing or furring changes direction.