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.
|Published (Last):||10 November 2017|
|PDF File Size:||14.88 Mb|
|ePub File Size:||18.97 Mb|
|Price:||Free* [*Free Regsitration Required]|
Materials categorized under this specification include: A fire test of assemblies shall be conducted to determine a fire resistance rating required for gypsum board assembly.
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. When “through wall” control joints are required in fire-rated assemblies, special details See drawing are necessary.
Where doorjambs c8440 from floor to 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. Moreover, gypsum assembly shall conform to framing size, fasteners spacing, ventilation, substrate, surface preparation, cutting, and installation application as indicated in the specification.
For a volume license the PDF is licensed to the person in which it is assigned. Download NGC app from your smartphone. A fire test of assemblies shall be conducted to determine a fire resistance rating aatm for gypsum board assembly.
Ast PDF Download is licensed per individual in which the individual can place on up to four electronic devices for their personal use.
For specific precautionary statements, asmt 4. 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. Additionally, control joints should be installed in ceilings to limit dimensions in either direction to 50 feet. To relieve the stresses that occur as a result of such movement, control joints are required in both partitions and ceilings.
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. Link to Active This link will always route to the current Active version of the standard. Control joints are recommended at doorjambs, extending from door head to ceiling.
In some cases when control joints are specified, v840 drawings are not coordinated with the specifications and the control joint details are frequently missed. 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.
National Gypsum Company, Drywall, Cement Board, Gypsum Board, Finishing Products
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 option is mobile friendly and compatible with all devices, including mobile tablets and smart phones.
These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the specification. 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 asgm testing laboratories. Gypsum board shall be cut by scoring and breaking or by sawing, working from the face side.
This standard does not purport to address all of the safety concerns, if any, associated with its use. Semi-solid Gypsum Board Partitions. Control joints should be installed where ceiling framing or furring changes direction. Even in the best of circumstances, sstm 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 840—08 Specification for Application and Finishing of Gypsum Board (PDF Download)
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.
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 often covered by reference specification. This abstract is a brief summary of the referenced standard.
Historical Version s – view previous versions of standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Moreover, gypsum assembly shall conform to framing size, fasteners spacing, aastm, substrate, surface preparation, cutting, and installation application as indicated in the specification. All materials shall be kept dry.