ASTM C1861-21

Standard Specification for Lathing and Furring Accessories, and Fasteners, for Interior and Exterior Portland Cement-Based Plaster

SCOPE
1.1 This specification contains the minimum requirements for lathing and furring accessories, and fasteners, as components of interior and exterior portland cement-based plaster assemblies, used to facilitate lathing and furring installation (Specifications C1063, C1787), cement plaster application (Specification C926), and functionality of the completed stucco cladding assembly  
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: Historical
• Publication Date: 30-Sep-2021
• 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

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C1861 −21
Standard Specification for
Lathing and Furring Accessories, and Fasteners, for Interior
1
and Exterior Portland Cement-Based Plaster
This standard is issued under the fixed designation C1861; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* B221Specification forAluminum andAluminum-Alloy Ex-
truded Bars, Rods, Wire, Profiles, and Tubes
1.1 This specification contains the minimum requirements
C926Specification for Application of Portland Cement-
for lathing and furring accessories, and fasteners, as compo-
Based Plaster
nents of interior and exterior portland cement-based plaster
C954SpecificationforSteelDrillScrewsfortheApplication
assemblies, used to facilitate lathing and furring installation
of Gypsum Panel Products or Metal Plaster Bases to Steel
(Specifications C1063, C1787), cement plaster application
Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) in
(SpecificationC926),andfunctionalityofthecompletedstucco
Thickness
cladding assembly
C1002Specification for Steel Self-Piercing Tapping Screws
1.2 Thevaluesstatedininch-poundunitsaretoberegarded
for Application of Gypsum Panel Products or Metal
as standard. The values given in parentheses are mathematical
Plaster Bases to Wood Studs or Steel Studs
conversions to SI units that are provided for information only
C1063Specification for Installation of Lathing and Furring
and are not considered standard.
to Receive Interior and Exterior Portland Cement-Based
1.3 This international standard was developed in accor- Plaster
dance with internationally recognized principles on standard-
C1787Specification for Installation of Non Metallic Plaster
ization established in the Decision on Principles for the Bases (Lath) Used with Portland Cement Based Plaster in
Development of International Standards, Guides and Recom-
Vertical Wall Applications
mendations issued by the World Trade Organization Technical D1784Classification System and Basis for Specification for
Barriers to Trade (TBT) Committee.
Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlo-
rinated Poly(Vinyl Chloride) (CPVC) Compounds
2. Referenced Documents
D4216Specification for Rigid Poly(Vinyl Chloride) (PVC)
2
and Related PVC and Chlorinated Poly(Vinyl Chloride)
2.1 ASTM Standards:
(CPVC) Building Products Compounds
A240/A240MSpecification for Chromium and Chromium-
F1667SpecificationforDrivenFasteners:Nails,Spikes,and
Nickel Stainless Steel Plate, Sheet, and Strip for Pressure
Staples
Vessels and for General Applications
3
2.2 AISI Standards:
A580/A580MSpecification for Stainless Steel Wire
AISI S220NorthAmerican Standard for Cold-Formed Steel
A641/A641MSpecification for Zinc–Coated (Galvanized)
Framing—Nonstructural Members
Carbon Steel Wire
AISI S240NorthAmerican Standard for Cold-Formed Steel
A653/A653MSpecification for Steel Sheet, Zinc-Coated
Structural Framing
(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)
by the Hot-Dip Process
3. Terminology
B69Specification for Rolled Zinc
3.1 Definitions:
3.1.1 Definitions shall be in accordance with Specification
1
C1063.
This specification is under the jurisdiction of ASTM Committee C11 on
GypsumandRelatedBuildingMaterialsandSystemsandisthedirectresponsibility
3.2 Definitions of Terms Specific to This Standard:
of Subcommittee C11.02 on Specifications and Test Methods for Accessories and
3.2.1 capture flange, n—the narrow flange element of a
Related Products.
lathing accessory that projects from a ground and returns onto
Current edition approved Oct. 1, 2021. Published October 2021. Originally
approved in 2017. Last previous edition approved in 2020 as C1861–20. DOI: theexteriorstuccocladdingsurfacetoconcealthegapbetween
10.1520/C1861-21.
the ground and stucco cladding.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on AvailablefromAmericanIronandSteel(AISI),25MassachusettsAvenue,NW,
the ASTM website. Suite 800, Washington, DC 20001, https://www.steel.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
1

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C1861−21
3.2.2 cement plaster panel area, n—the surface of a cement out deforming the attachment flange or shall include optional
plaster area between lathing accessory grounds. fastener holes used to fasten the lathing accessory.
4.1.3 Lathing and furring accessories shall
...

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: C1861 − 20 C1861 − 21
Standard Specification for
Lathing and Furring Accessories, and Fasteners, for Interior
1
and Exterior Portland Cement-Based Plaster
This standard is issued under the fixed designation C1861; 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.
1. Scope*
1.1 This specification contains the minimum requirements for lathing and furring accessories, and fasteners, as components of
interior and exterior portland cement-based plaster assemblies, used to facilitate lathing and furring installation (Specifications
C1063, C1787), cement plaster application (Specification C926), and functionality of the completed stucco cladding assembly
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
2.1 ASTM Standards:
A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and
for General Applications
A580/A580M Specification for Stainless Steel Wire
A641/A641M Specification for Zinc–Coated (Galvanized) Carbon Steel Wire
A653/A653M Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the
Hot-Dip Process
B69 Specification for Rolled Zinc
B221 Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes
C926 Specification for Application of Portland Cement-Based Plaster
C954 Specification for Steel Drill Screws for the Application of Gypsum Panel Products or Metal Plaster Bases to Steel Studs
from 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) in Thickness
C1002 Specification for Steel Self-Piercing Tapping Screws for Application of Gypsum Panel Products or Metal Plaster Bases
to Wood Studs or Steel Studs
C1063 Specification for Installation of Lathing and Furring to Receive Interior and Exterior Portland Cement-Based Plaster
C1787 Specification for Installation of Non Metallic Plaster Bases (Lath) Used with Portland Cement Based Plaster in Vertical
Wall Applications
1
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 May 1, 2020Oct. 1, 2021. Published June 2020October 2021. Originally approved in 2017. Last previous edition approved in 20182020 as
C1861 – 18.C1861 – 20. DOI: 10.1520/C1861-20.10.1520/C1861-21.
2
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.
*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
1

---------------------- Page: 1 ----------------------
C1861 − 21
D1784 Classification System and Basis for Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated
Poly(Vinyl Chloride) (CPVC) Compounds
D4216 Specification for Rigid Poly(Vinyl Chloride) (PVC) and Related PVC and Chlorinated Poly(Vinyl Chloride) (CPVC)
Building Products Compounds
F1667 Specification for Driven Fasteners: Nails, Spikes, and Staples
3
2.2 AISI Standards:
AISI S220 North American Standard for Cold-Formed Steel Framing—Nonstructural Members
AISI S240 North American Standard for Cold-Formed Steel Structural Framing
3. Terminology
3.1 Definitions:
3.1.1 Definitions shall be in accordance with Specification C1063.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 capture flange, n—the narrow flange element of a lathing accessory that projects from a ground and returns onto the exterior
stucco cladding surface to conceal the gap between the ground and
...