ASTM C1861-18
(Specification)Standard Specification for Lathing and Furring Accessories, and Fasteners, for Interior and Exterior Portland Cement-Based Plaster
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.
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Designation:C1861 −18
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 The values stated in inch-pound units are to be regarded
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 D1784Specification for Rigid Poly(Vinyl Chloride) (PVC)
Barriers to Trade (TBT) Committee.
Compounds and Chlorinated 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
A580/A580MSpecification for Stainless Steel Wire
3. Terminology
A641/A641MSpecification for Zinc–Coated (Galvanized)
Carbon Steel Wire
3.1 Definitions:
A653/A653MSpecification for Steel Sheet, Zinc-Coated
3.1.1 Definitions shall be in accordance with Specification
(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)
C1063.
by the Hot-Dip Process
3.2 Definitions of Terms Specific to This Standard:
B69Specification for Rolled Zinc
3.2.1 capture flange, n—the narrow flange element of a
lathing accessory that projects from a ground and returns onto
theexteriorstuccocladdingsurfacetoconcealthegapbetween
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC11onGypsum
the ground and stucco cladding.
and Related Building Materials and Systems and is the direct responsibility of
Subcommittee C11.02 on Specifications and Test Methods for Accessories and 3.2.2 cement plaster panel area, n—the surface of a cement
Related Products.
plaster area between lathing accessory grounds.
Current edition approved April 15, 2018. Published April 2018. Originally
3.2.3 drainage surface, n—the sloped or non-sloped, perfo-
approved in 2017. Last previous edition approved in 2017 as C1861–17. DOI:
10.1520/C1861-18.
rated or non-perforated surface element of a lathing accessory
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
that facilitates a drainage function, by directing water from
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
behind the stucco cladding to the exterior of the stucco
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. cladding.
*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 ----------------------
C1861−18
3.2.4 drip flange, n—the narrow flange element of a lathing drainage, to reduce cracking by accommodating movement, to
accessory that facilitates a drainage function, projects from a separate cement plaster from dissimilar materials, load be
...
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 − 17 C1861 − 18
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 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
D1784 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. Terminology
3.1 Definitions:
3.1.1 Definitions shall be in accordance with Specification C1063.
1
This test method 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 July 1, 2017April 15, 2018. Published August 2017April 2018. Originally approved in 2017. Last previous edition approved in 2017 as
C1861 – 17. DOI: 10.1520/C1861–17.10.1520/C1861-18.
2
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.
*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 − 18
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 stucco cladding.
3.2.2 cement plaster panel area, n—the surface of a cement plaster area between lathing accessory grounds.
3.2.3 drainage surface, n—the sloped or non-sloped, perforated or non-perforated surface element of
...
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