ASTM C1047-14a(2019)

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Designation: C1047 − 14a C1047 − 14a (Reapproved 2019)
Standard Specification for
Accessories for Gypsum Wallboard and Gypsum Veneer
Base
This standard is issued under the fixed designation C1047; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification covers accessories used in conjunction with assemblies of gypsum wallboard and gypsum veneer base to
protect edges and corners and to provide architectural features (see Fig. 1).
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
A463/A463M Specification for Steel Sheet, Aluminum-Coated, by the Hot-Dip Process
A653/A653M Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the
Hot-Dip Process
A875/A875M Specification for Steel Sheet, Zinc-5 % Aluminum Alloy-Coated by the Hot-Dip Process
A879/A879M Specification for Steel Sheet, Zinc Coated by the Electrolytic Process for Applications Requiring Designation of
the Coating Mass on Each Surface
B69 Specification for Rolled Zinc
B117 Practice for Operating Salt Spray (Fog) Apparatus
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C475/C475M Specification for Joint Compound and Joint Tape for Finishing Gypsum Board
C587 Specification for Gypsum Veneer Plaster
D1788 Specification for Rigid Acrylonitrile-Butadiene-Styrene(Abs) Plastics (Withdrawn 1988)
D3678 Specification for Rigid Poly(Vinyl Chloride) (PVC) Interior-Profile Extrusions
D3935 Classification System and Basis for Specification for Polycarbonate (PC) Unfilled and Reinforced Material
D4549 Classification System and Basis for Specification for Polystyrene and Rubber-Modified Polystyrene Molding and
Extrusion Materials (PS)
D5927 Classification System for andBasis for Specifications for Thermoplastic Polyester (TPES) Injection and Extrusion
Materials Based on ISO Test Methods
D6386 Practice for Preparation of Zinc (Hot-Dip Galvanized) Coated Iron and Steel Product and Hardware Surfaces for Painting
3. Terminology
3.1 Definitions:
3.1.1 Definitions shall be in accordance with Terminology C11.
This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility of
Subcommittee C11.02 on Specifications and Test Methods for Accessories and Related Products.
Current edition approved June 1, 2014Oct. 1, 2019. Published June 2014October 2019. Originally approved in 1992. Last previous edition approved in 20102014 as
C1047–14.–14a. DOI: 10.1520/C1047-14a.10.1520/C1047-14AR19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
The last approved version of this historical standard is referenced on www.astm.org.
*A Summary of Changes section appears at the end of this standard
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C1047 − 14a (2019)
FIG. 1 Accessories for Gypsum Wallboard and Gypsum Veneer Base
3.2 Definitions of Terms Specific to This Standard:
3.2.1 accessories, n—cornerbeads, edge trims, and control joints, such as casing beads, bull noses, and stops.
3.2.2 control joint, n—a formed product used for designed or required separations between adjacent surfaces of gypsum boards
or gypsum veneer base.
3.2.3 cornerbead, n—a formed metal, plastic, metal and paper, or plastic and paper angle for inside and outside corners of
gypsum boards or gypsum veneer base.
3.2.4 edge trim, n—typically “J”- or “L”-shaped strip, as shown in Fig. 1, formed of metal, plastic, metal and paper, or plastic
and paper to cover exposed ends or edges of gypsum board or gypsum veneer base.
3.2.5 flange, n—that portion of the accessory used for the attachment to gypsum wallboard, gypsum veneer base, or a framing
member.
3.2.6 wing, n—that portion of paper that extends beyond the flange of the metal or plastic cornerbead or accessory used to attach
the cornerbead or accessory to gypsum wallboard or gypsum veneer base.
4. Materials and Manufacture
4.1 Steel Accessories:
4.1.1 Steel accessories and steel components of accessories manufactured from steel and paper in combination, with total flange
width (sum of both flanges) less than 2.0 in. (51 mm), shall be manufactured from zinc-coated cold-roll (coil or cut length) sheet
steel not less than 0.012-in. (0.30-mm) thick before application of coating.
4.1.2 Steel accessories and steel components of accessories manufactured from steel and paper in combination, with total flange
width (sum of both flanges) greater than 2.0 in. (51 mm), shall be manufactured from zinc-coated cold-roll (coil or cut length) sheet
steel not less than 0.009-in. (0.23 mm) thick before application of coating.
4.1.3 Sheet steel, zinc-coated by the hot-dip process, shall be in accordance with Specification A653/A653M, minimized
spangle, minimum G-30 coating.
4.1.4 Sheet steel, zinc-5 % aluminum alloy coated, shall be in accordance with Specification A875/A875M minimum GF15
coating.
C1047 − 14a (2019)
4.1.5 Sheet steel, zinc-coated by the electrolytic process shall be in accordance with Specification A879/A879M minimum
coating on surface side to be 0.000140 in. (0.00356 mm), minimum coating on reverse side to be 0.00010 in. (0.00254 mm).
4.1.6 Sheet steel, aluminum-coated, shall be in accordance with Specification A463/A463M minimum T
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