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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Gypsum wallboard, as well as other building products and materials, is subject to some form of movement induced by changes in moisture, temperature aatm both.
ASTM C 840—08 Specification for Application and Finishing of Gypsum Board (PDF Download)
This specification covers requirements for the methods of application and finishing of gypsum board. One component of gypsum board construction often overlooked by architects and contractors is the control joint. To relieve the stresses that occur as a result of such movement, control joints are required in both partitions and ceilings.
Moreover, gypsum aetm shall conform to framing size, fasteners spacing, ventilation, substrate, surface preparation, cutting, and installation application as indicated in the specification. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. This option is mobile friendly and compatible with all devices, including mobile tablets and smart phones.
Where doorjambs extend from floor ast ceiling and are spaced less than 30 feet apart, no control joints are required.
Isolation joints should be installed where structural elements such as slabs, columns or exterior walls can bear directly on non-load bearing partitions. Gypsum board shall be cut by scoring and breaking or by sawing, working from the face side. Materials categorized under this specification include: For specific precautionary statements, see 4. Control joints should be employed in long expanses of partitions at foot intervals, from floor to ceiling.
Control joints are frequently necessary to prevent cracking in gypsum wallboard. Gypsum board assembly shall conform to acoustical v840 of the specification where sound control is required. 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. Link to Active This link will always route to the current Active version of the standard.
Semi-solid Gypsum Board Partitions. Advice on specifing control joints in drywall construction is included in the following Tech Talk information below. Even if control joints do not appear sstm be specified they are often covered by reference specification. 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: When “through wall” control joints are required in fire-rated assemblies, special details See drawing are necessary.
ASTM C – 01 Standard Specification for Application and Finishing of Gypsum Board
In some cases when control joints are specified, the drawings are not coordinated with the specifications and the control joint details are frequently missed. Architects sometimes fail to specify control joints. These details are based on Warnock Hersey International, Inc. Application of Vinyl Faced Gypsum Board.
National Gypsum Company, Drywall, Cement Board, Gypsum Board, Finishing Products
Additionally, control joints should be installed in ceilings to limit dimensions in either direction to 50 feet. Use on a local area network or other network is not permitted. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the specification.
This specification covers requirements for the methods of application and finishing of gypsum board. 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.
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 ashm gypsum board. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not ashm standard.
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.
A fire test of assemblies shall be conducted to determine a fire resistance rating required for gypsum board assembly. Construction details for a specific assembly asstm achieve the required c8440 resistance shall be obtained from reports of fire-resistance tests, engineering evaluations, or listings from recognized fire testing laboratories.
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We recommend users of early versions of Internet Explorer to update to Version 10 or later. For a volume license the PDF is licensed to the person in which it is assigned. Cracking may also be caused by stresses resulting from building ast. Gypsum board assembly shall conform to acoustical tests of the specification where sound control is required. The PDF Download is licensed per individual in which the individual can place on up to four electronic devices for their personal use.
This standard does not purport to address all of the safety concerns, if any, associated with its use.