ASTM C1047-19

Standard Specification for Accessories for Gypsum Wallboard and Gypsum Veneer Base

ABSTRACT
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. Steel accessories and steel components of accessories manufactured from steel and paper in combination shall be manufactured from zinc-coated cold-roll sheet steel before application of coating. Phosphatizing or other surface treatments may be used to ensure compatibility and bond. Paper components of accessories manufactured from steel and paper in combination shall comply with requirements for thickness, tensile strength, dimensional stability, and bond of joint tape to joint compound. Accessories shall be free of twist or camber of a degree that will prevent their use in the assembly for which they are intended. Edges of accessories shall be free of burrs and sharp edges.
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).  
FIG. 1 Accessories for Gypsum Wallboard and Gypsum Veneer Base  
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.

General Information

• Status: Published
• Publication Date: 31-Oct-2019
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C11 - Gypsum and Related Building Materials and Systems
• Drafting Committee: C11.02 - Specifications and Test Methods for Accessories and Related Products

Relations

• Replaces: ASTM C1047-14a(2019) - Standard Specification for Accessories for Gypsum Wallboard and Gypsum Veneer Base
• Effective Date: 01-Nov-2019
• Refers: ASTM D3678-19 - Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Interior-Profile Extrusions
• Effective Date: 01-Nov-2019
• Refers: ASTM C587-04(2018) - Standard Specification for Gypsum Veneer Plaster
• Effective Date: 01-Oct-2018
• Refers: ASTM C11-18a - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Oct-2018
• Refers: ASTM C11-18 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Jun-2018
• Refers: ASTM C11-17a - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Oct-2017
• Refers: ASTM C11-17 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 15-May-2017
• Refers: ASTM D5927-17 - Standard Classification System for and Basis for Specifications for Thermoplastic Polyester (TPES) Injection and Extrusion Materials Based on ISO Test Methods
• Effective Date: 01-Mar-2017
• Refers: ASTM C11-16 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 15-May-2016
• Refers: ASTM D6386-16 - Standard Practice for Preparation of Zinc (Hot-Dip Galvanized) Coated Iron and Steel Product and Hardware Surfaces for Painting
• Effective Date: 01-May-2016
• Refers: ASTM C11-15a - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Oct-2015
• Refers: ASTM C475/C475M-15 - Standard Specification for Joint Compound and Joint Tape for Finishing Gypsum Board
• Effective Date: 01-Jun-2015
• Refers: ASTM C11-15 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Apr-2015
• Refers: ASTM D5927-14 - Standard Classification System for and Basis for Specifications for Thermoplastic Polyester (TPES) Injection and Extrusion Materials Based on ISO Test Methods
• Effective Date: 01-Dec-2014
• Refers: ASTM D3678-14 - Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Interior-Profile Extrusions
• Effective Date: 01-Aug-2014

Overview

ASTM C1047-19: Standard Specification for Accessories for Gypsum Wallboard and Gypsum Veneer Base establishes performance and quality requirements for accessories used in gypsum wallboard and gypsum veneer base assemblies. Issued by ASTM International, this standard addresses critical components such as corner beads, edge trims, and control joints that are essential for protecting edges and corners, enhancing durability, and achieving desired architectural finishes. Compliance with ASTM C1047-19 ensures that these accessories meet industry-accepted criteria for materials, manufacturing, physical properties, and appearance, facilitating quality construction and improved aesthetic outcomes in drywall systems.

Key Topics

• Scope of Accessories
  • Addresses corner beads, edge trims, and control joints for gypsum wallboard and veneer base.
  • Covers both steel, zinc, plastic, and combination paper-faced materials.
• Material Requirements
  • Details minimum thickness, type of coatings (zinc-coated, aluminum-coated), and specifications for steel, zinc, and plastic components.
  • Paper components must adhere to standards for thickness, tensile strength, dimensional stability, and bonding properties.
• Physical and Dimensional Properties
  • Specifies standards for compatibility, surface bond, resistance to oxidation, and physical dimensions such as flange width and edge trim size.
  • Accessories must be free from imperfections like sharp edges, burrs, twist, or camber that could impede installation.
• Configuration and Construction
  • Requirements for accessory design to ensure proper fit, fastening options, and performance in gypsum board assemblies.
  • Additional criteria for paper-faced and adhesive-attached accessories.

Applications

ASTM C1047-19 is integral to the construction and finishing of interior walls and ceilings where gypsum wallboard or veneer base is utilized. Its practical applications include:

• Building and Construction Projects
  • Ensures the correct selection of accessory products for residential, commercial, and institutional buildings.
  • Helps minimize cracks, protect vulnerable edges, and sustain the longevity of wall systems.
• Architectural Finishing
  • Provides architects, specifiers, and contractors with standards for consistent, high-quality finishes.
  • Guides the installation of specialty trims and control joints for both functional and decorative purposes.
• Quality Assurance and Compliance
  • Used by manufacturers, suppliers, and quality inspectors to verify that gypsum accessories meet established industry standards.
  • Facilitates inspection, certification, and rejection procedures to safeguard construction quality.

Related Standards

Adherence to ASTM C1047-19 often involves cross-referencing with related ASTM and industry standards to ensure comprehensive compliance and compatibility, including:

• ASTM A653/A653M: Specification for Steel Sheet, Zinc-Coated or Zinc-Iron Alloy-Coated by the Hot-Dip Process
• ASTM A463/A463M: Specification for Steel Sheet, Aluminum-Coated, by the Hot-Dip Process
• ASTM B69: Specification for Rolled Zinc
• ASTM C475/C475M: Specification for Joint Compound and Joint Tape for Finishing Gypsum Board
• ASTM D3678: Specification for Rigid Poly(Vinyl Chloride) (PVC) Interior-Profile Extrusions
• ASTM B117: Practice for Operating Salt Spray (Fog) Apparatus

These referenced standards collectively assure robust, compatible, and high-performance accessory solutions for gypsum assemblies in modern construction.

Keywords: gypsum wallboard accessories, corner bead, edge trim, control joint, drywall finishing, ASTM C1047-19, zinc-coated steel, paper-faced trim, architectural features, gypsum board standards, building materials compliance.

Standards Content (Sample)

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.
Designation:C1047 −19
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* C11 Terminology Relating to Gypsum and Related Building
Materials and Systems
1.1 This specification covers accessories used in conjunc-
C475/C475M Specification for Joint Compound and Joint
tion with assemblies of gypsum wallboard and gypsum veneer
Tape for Finishing Gypsum Board
base to protect edges and corners and to provide architectural
C587 Specification for Gypsum Veneer Plaster
features (see Fig. 1).
D1788 Specification for Rigid Acrylonitrile-Butadiene-
1.2 The values stated in inch-pound units are to be regarded 3
Styrene(Abs) Plastics (Withdrawn 1988)
as standard. The values given in parentheses are mathematical
D3678 Specification for Rigid Poly(Vinyl Chloride) (PVC)
conversions to SI units that are provided for information only
Interior-Profile Extrusions
and are not considered standard.
D3935 Classification System and Basis for Specification for
1.3 This international standard was developed in accor-
Polycarbonate (PC) Unfilled and Reinforced Material
dance with internationally recognized principles on standard- D4549 Classification System and Basis for Specification for
ization established in the Decision on Principles for the
Polystyrene and Rubber-Modified Polystyrene Molding
Development of International Standards, Guides and Recom- and Extrusion Materials (PS)
mendations issued by the World Trade Organization Technical
D5927 Classification System for andBasis for Specifications
Barriers to Trade (TBT) Committee. for Thermoplastic Polyester (TPES) Injection and Extru-
sion Materials Based on ISO Test Methods
2. Referenced Documents
D6386 Practice for Preparation of Zinc (Hot-Dip Galva-
nized) Coated Iron and Steel Product and Hardware
2.1 ASTM Standards:
Surfaces for Painting
A463/A463M Specification for Steel Sheet, Aluminum-
Coated, by the Hot-Dip Process
3. Terminology
A653/A653M Specification for Steel Sheet, Zinc-Coated
3.1 Definitions:
(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)
3.1.1 Definitions shall be in accordance with Terminology
by the Hot-Dip Process
C11.
A875/A875M Specification for Steel Sheet, Zinc-5 % Alu-
3.2 Definitions of Terms Specific to This Standard:
minum Alloy-Coated by the Hot-Dip Process
3.2.1 accessories, n—cornerbeads, edge trims, and control
A879/A879M Specification for Steel Sheet, Zinc Coated by
joints, such as casing beads, bull noses, and stops.
the Electrolytic Process for Applications Requiring Des-
ignation of the Coating Mass on Each Surface
3.2.2 control joint, n—a formed product used for designed
B69 Specification for Rolled Zinc
or required separations between adjacent surfaces of gypsum
B117 Practice for Operating Salt Spray (Fog) Apparatus
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
This specification is under the jurisdiction of ASTM Committee C11 on
of gypsum boards or gypsum veneer base.
Gypsum and Related Building Materials and Systems and is the direct responsibility
of Subcommittee C11.02 on Specifications and Test Methods for Accessories and
3.2.4 edge trim, n—typically “J”- or “L”-shaped strip, as
Related Products.
shown in Fig. 1, formed of metal, plastic, metal and paper, or
Current edition approved Nov. 1, 2019. Published November 2019. Originally
approved in 1992. Last previous edition approved in 2019 as C1047 – 14a (2019). plastic and paper to cover exposed ends or edges of gypsum
DOI: 10.1520/C1047-19.
board or gypsum veneer base.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1047−19
FIG. 1Accessories for Gypsum Wallboard and Gypsum Veneer Base
3.2.5 flange, n—that portion of the accessory used for the 4.1.4 Sheet steel, zinc-5 % aluminum alloy coated, shall be
attachment to gypsum wallboard, gypsum veneer base, or a in accordance with Specification A875/A875M minimum
framing member. GF15 coating.
4.1.5 Sheet steel, zinc-coated by the electrolytic process
3.2.6 wing, n—that portion of paper that extends beyond the
shall be in accordance with Specification A879/A879M mini-
flange of the metal or plastic cornerbead or accessory used to
mum coating on surface side to be 0.000140 in. (0.00356 mm),
attach the cornerbead or accessory to gypsum wallboard or
minimum coating on reverse side to be 0.00010 in.
gypsum veneer base.
(0.00254 mm).
4.1.6 Sheet steel, aluminum-coated, shall be in accordance
4. Materials and Manufacture
with Specification A463/A463M minimum T1-40 coating.
4.1 Steel Accessories:
4.1.7 Zinc-phosphate treatment (as specified in 5.4.2 of
4.1.1 Steel accessories and steel components of accessories
Practice D6386) or other surface treatments may be used to
manufactured from steel and paper in combination, with total
ensure compatibility and bond as specified in Section 5.
flange width (sum of both flanges) less than 2.0 in. (51 mm),
shall be manufactured from zinc-coated cold-roll (coil or cut
4.2 Zinc accessories shall be manufactured from rolled zinc
length) sheet steel not less than 0.012-in. (0.30-mm) thick
in accordance with Specification B69, Type I, not less than
before application of coating.
0.012-in. (0.305-mm) thick.
4.1.2 Steel accessories and steel components of accessories
4.3 Plastic accessorie
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1047 − 14a (Reapproved 2019) C1047 − 19
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 Oct. 1, 2019Nov. 1, 2019. Published October 2019_____ 2019. Originally approved in 1992. Last previous edition approved in 20142019 as
C1047C1047 – 14a (2019).–14a. DOI: 10.1520/C1047-14AR19.10.1520/C1047-19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1047 − 19
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 − 19
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).(0.00254 mm).
4.1.6 Sheet steel, aluminum-coated, shall be in accordance with Specification A463/A463M mi
...