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.
One component of gypsum board construction often overlooked by architects and c80 is the control joint. When “through wall” control joints are required in fire-rated assemblies, special details See drawing are necessary. All materials shall be kept dry. Materials categorized under this specification include: Semi-solid Gypsum Board Partitions. Control joints are frequently necessary to prevent c480 in gypsum wallboard.
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.
Materials categorized under this specification include: Asym specification covers requirements for the methods of application and finishing of gypsum board. Gypsum board shall be cut by scoring and breaking or by sawing, working from the face side.
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.
ASTM C —08 Specification for Application and Finishing of Gypsum Board (PDF Download)
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. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. A fire test of assemblies shall be conducted to determine a fire resistance rating required for gypsum board assembly. Gypsum board shall be cut by scoring and breaking or by sawing, working from the face side.
Advice on specifing control joints in drywall construction is included in the following Tech Talk information below.
ASTM C 840—08 Specification for Application and Finishing of Gypsum Board (PDF Download)
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Additionally, control joints should be installed in ceilings to limit dimensions in either direction to 50 feet.
Control joints ast, required in ceilings to limit areas to 2, square feet. This option is mobile friendly and compatible with all devices, including mobile tablets and smart phones.
This specification covers requirements for the methods of application and finishing of gypsum board. This standard does not purport to address all of the safety concerns, if any, associated with its c480. Control joints are recommended at doorjambs, extending from door head to ceiling. Control joints should be installed where ceiling framing or furring changes direction.
Use on a local area network or other network is not permitted. All materials shall be kept dry. Link to Active This link will always route to the current Active version of the standard. Masonry or concrete walls shall be dry, free of asttm, oil, or form release agents, protrusions or voids, or foreign matter that inhibit bond for adhesively applied gypsum board. Download NGC app from your smartphone. Distribution of the PDF is not permitted.
Historical Version s – view previous versions of standard. In some cases when control joints are specified, the drawings are not coordinated with awtm specifications and the control joint details are frequently missed.
Even if control joints do not appear to be specified they are often covered by reference specification. Construction details ashm 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.