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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Gypsum board assembly shall conform to acoustical tests of the specification where sound control is required. 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.
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. A fire test of assemblies shall be conducted to determine a fire resistance rating required for gypsum board assembly. 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. Semi-solid Gypsum Board Partitions. Control joints should be installed where ceiling framing or furring changes direction.
All materials shall be astmm dry. Download NGC app from your smartphone. 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. 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.
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 asttm board.
Control joints are frequently necessary to prevent cracking in gypsum wallboard.
For specific precautionary statements, see 4. This specification covers requirements for the methods of application and finishing of gypsum board. Advice on specifing control joints in drywall construction is included in the following Tech Talk information below.
Even if control joints do not appear to be specified they are asfm covered by reference specification. Materials categorized under this specification include: Use on a local area network or other network is not permitted. This standard does not purport to address all of the safety concerns, if any, associated with its use.
National Gypsum Company, Drywall, Cement Board, Gypsum Board, Finishing Products
For a volume license the PDF is licensed to the person in which it is assigned. Application of Vinyl Faced Gypsum Board. Control joints should be employed in long expanses of partitions at foot intervals, from floor to ceiling. 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. Additionally, control joints should be installed in ceilings to limit dimensions in either direction to 50 feet.
ASTM C – 01 Standard Specification for Application and Finishing of Gypsum Board
Distribution of the PDF is not permitted. Architects sometimes fail to specify control joints. Gypsum board shall be cut by scoring and breaking or by sawing, satm from the face side. Where doorjambs extend from floor to ceiling and are spaced less than 30 feet apart, no control joints are required. The PDF Download is licensed per individual in which the individual can aatm on up to four electronic devices for their personal use. Moreover, gypsum assembly shall conform to framing size, fasteners spacing, ventilation, substrate, surface adtm, cutting, and installation application as indicated in the specification.
Moreover, gypsum assembly shall conform 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.
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.
Control joints are required in ceilings to limit areas to 2, square feet. We recommend users of early versions of Internet Explorer to update to Version 10 or later. These details are based on Warnock Hersey International, Inc.
The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Cracking may also be caused by stresses resulting from building movement. This option is mobile friendly and compatible with all devices, including mobile tablets and smart phones. When “through wall” control joints are required in fire-rated assemblies, special details See drawing are necessary. 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 C 840—08 Specification for Application and Finishing of Gypsum Board (PDF Download)
Link to Active This link will always route to the current Active version of the standard. Construction details for a specific assembly to achieve the required fire resistance shall be obtained from reports of astj tests, engineering evaluations, or listings from recognized fire testing laboratories.
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. Gypsum board assembly shall conform to acoustical tests of the specification where sound control is required.