ASTM C1764-12(2018)
(Test Method)Standard Test Methods for Non Metallic Plaster Bases (Lath) Used with Portland Cement Based Plaster in Vertical Wall Applications
Standard Test Methods for Non Metallic Plaster Bases (Lath) Used with Portland Cement Based Plaster in Vertical Wall Applications
SIGNIFICANCE AND USE
4.1 General:
4.1.1 Non metallic reinforced Portland Cement Based Plaster are vertically applied exterior wall claddings that may be subject to variety of conditions over the claddings service life. The series of tests described in this standard evaluates performance under a variety of test conditions and exposures. Any given project may not be subject to all of the test conditions described herein and all of the test methods may not evaluate all exposures for a given project.
4.2 Transverse Load:
4.2.1 This test determines the ultimate wind load resistance of the wall assembly including influence of the framing, sheathing, and means of attachment.
4.3 Vertical Load:
4.3.1 The weight and attachment mechanism of Portland Cement Based Plaster results in a vertical load transfer to the plaster base. This test method determines the ultimate vertical load capacity of the cladding assembly based on taking the specimen to failure.
4.4 Embedment:
4.4.1 Plaster bases serve as a key, reinforcement and attachment mechanism for Portland Cement Based Plaster. The thickness, profile, and material properties of the plaster bases must be such that it is adequately embedded in the Portland Cement Based Plaster. This can be accomplished through use of a self furred non metallic plaster base or other means such as furring strips. This test procedure determines the effectiveness of the furring mechanism to ensure that the minimum embedment is obtained.
4.5 Fastener Pull Through Resistance:
4.5.1 The non metallic lath is secured to the building frame or substrate with fasteners. This test evaluates the fastener attachment effectiveness.
4.6 Alkali Resistance (Glass Fiber Lath Only):
4.6.1 Per E2098/E2098M.
SCOPE
1.1 These test methods evaluate the performance of vertical wall applications of non metallic plaster bases used with Portland Cement Based Plaster under a variety of test exposures.
1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.
1.4 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
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Designation: C1764 − 12 (Reapproved 2018)
Standard Test Methods for
Non Metallic Plaster Bases (Lath) Used with Portland
Cement Based Plaster in Vertical Wall Applications
This standard is issued under the fixed designation C1764; 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 E2098/E2098M Test Method for Determining Tensile
Breaking Strength of Glass Fiber Reinforcing Mesh for
1.1 These test methods evaluate the performance of vertical
Use in Class PB Exterior Insulation and Finish Systems
wall applications of non metallic plaster bases used with
(EIFS), after Exposure to a Sodium Hydroxide Solution
Portland Cement Based Plaster under a variety of test expo-
2.2 ICC-ES Acceptance Criteria:
sures.
AC 191 Acceptance Criteria for Metal Plaster Bases (Lath)
1.2 Units—The values stated in either SI units or inch-
pound units are to be regarded separately as standard. The
3. Terminology
values stated in each system may not be exact equivalents;
3.1 Definitions—For definitions of terms used in these test
therefore, each system shall be used independently of the other.
methods, refer to Terminology E631.
Combining values from the two systems may result in non-
conformance with the standard. 3.2 Definitions of Terms Specific to This Standard:
3.2.1 non metallic, plaster base (lath)—material used as a
1.3 This standard does not purport to address all of the
base for Portland Cement Based Plaster that is flat or self
safety concerns, if any, associated with its use. It is the
furred.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
4. Significance and Use
mine the applicability of regulatory limitations prior to use.
4.1 General:
1.4 This international standard was developed in accor-
4.1.1 Non metallic reinforced Portland Cement Based Plas-
dance with internationally recognized principles on standard-
ter are vertically applied exterior wall claddings that may be
ization established in the Decision on Principles for the
subject to variety of conditions over the claddings service life.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical The series of tests described in this standard evaluates perfor-
mance under a variety of test conditions and exposures. Any
Barriers to Trade (TBT) Committee.
given project may not be subject to all of the test conditions
2. Referenced Documents described herein and all of the test methods may not evaluate
all exposures for a given project.
2.1 ASTM Standards:
C926 Specification for Application of Portland Cement- 4.2 Transverse Load:
Based Plaster 4.2.1 This test determines the ultimate wind load resistance
E330/E330M Test Method for Structural Performance of
of the wall assembly including influence of the framing,
Exterior Windows, Doors, Skylights and Curtain Walls by sheathing, and means of attachment.
Uniform Static Air Pressure Difference
4.3 Vertical Load:
E631 Terminology of Building Constructions
4.3.1 The weight and attachment mechanism of Portland
Cement Based Plaster results in a vertical load transfer to the
plaster base. This test method determines the ultimate vertical
These test methods are under the jurisdiction of ASTM Committee C11 on
load capacity of the cladding assembly based on taking the
Gypsum and Related Building Materials and Systems and is the direct responsibility
specimen to failure.
of Subcommittee C11.02 on Specifications and Test Methods for Accessories and
Related Products.
4.4 Embedment:
Current edition approved Oct. 1, 2018. Published October 2018. Originally
4.4.1 Plaster bases serve as a key, reinforcement and attach-
approved in 2012. Last previous edition approved in 2016 as C1764 – 12 (2016).
DOI: 10.1520/C1764-12R18.
ment mechanism for Portland Cement Based Plaster. The
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
thickness, profile, and material properties of the plaster bases
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
must be such that it is adequately embedded in the Portland
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Cement Based Plaster. This can be accomplished through use
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1764 − 12 (2018)
of a self furred non metallic plaster base or other means such 6.4 Fastener Pull Through Resistance:
as furring strips. This test procedure determines the effective- 6.4.1 Construct five test frames using nominal 2 by 4 in. (50
ness of the furring mechanism to ensure that the minimum by 100 mm) wood framing with specific gravity of 0.42 and
embedment is obtained. any other types of framing as specified by the non metallic lath
manufacturer.Thetestframeshallbe12in.(305mm)wideand
4.5 Fastener Pull Through Resistance:
sufficient height to permit placement of three or more lath
4.5.1 The non metallic lath is secured to the building frame
fasteners. One stud centered in the panel and sheathed one side
or substrate with fasteners. This test evaluates the fastener
with ⁄2 in. (13 mm) thick gypsum sheathing. Two layers of a
attachment effectiveness.
water resistive barrier shall be attached to the sheathing using
4.6 Alkali Resistance (Glass Fiber Lath Only):
staples 12 in. (305 mm) on center around the panel perimeter.
4.6.1 Per E2098/E2098M.
A plaster stop or grounds shall be fastened around the panel
perimeter.Apply the lath to the sample with one horizontal lap
5. Sampling, Test Specimens, and Test Units
and fastened to the stud per the manufacturers recommenda-
5.1 The number, size and configuration of the test speci-
tions. Apply the Portland Cement Based Plaster per C926.
mens shall be as per each test procedure with the exception of
Allow the stucco to cure and remove the sheathing that exists
Transverse Load tests which shall incorporate wood or steel between the wood framing.
framing as determined by the user. Samples shall be represen-
6.5 Alkali Resistance (Glass Fiber Lath Only):
tative of standard products and construction methods.
6.5.1 Ten specimens in the warp and ten specimens in the
weft directions should be cut from the roll glass fiber lath and
6. Test Specimens
labeled as control specimens. Ten specimens in the warp and
6.1 Transverse Load:
ten specimens in the weft directions should be cut from the roll
6.1.1 Construct three test specimens. Test specimen size
glass fiber lath and labeled as conditioned specimens. All
shall be minimum 4 by 8 ft (1.2 by 2.4 m) and constructed
specimens we
...
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: C1764 − 12 (Reapproved 2016) C1764 − 12 (Reapproved 2018)
Standard Test Methods for
Non Metallic Plaster Bases (Lath) Used with Portland
Cement Based Plaster in Vertical Wall Applications
This standard is issued under the fixed designation C1764; 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 These test methods evaluate the performance of vertical wall applications of non metallic plaster bases used with Portland
Cement Based Plaster under a variety of test exposures.
1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated
in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values
from the two systems may result in non-conformance with the standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 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:
C926 Specification for Application of Portland Cement-Based Plaster
E330E330/E330M Test Method for Structural Performance of Exterior Windows, Doors, Skylights and Curtain Walls by
Uniform Static Air Pressure Difference
E631 Terminology of Building Constructions
E2098E2098/E2098M Test Method for Determining Tensile Breaking Strength of Glass Fiber Reinforcing Mesh for Use in
Class PB Exterior Insulation and Finish Systems (EIFS), after Exposure to a Sodium Hydroxide Solution
2.2 ICC-ES Acceptance Criteria:
AC 191 Acceptance Criteria for Metal Plaster Bases (Lath)
3. Terminology
3.1 Definitions—For definitions of terms used in these test methods, refer to Terminology E631.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 non metallic, plaster base (lath)—material used as a base for Portland Cement Based Plaster that is flat or self furred.
4. Significance and Use
4.1 General:
4.1.1 Non metallic reinforced Portland Cement Based Plaster are vertically applied exterior wall claddings that may be subject
to variety of conditions over the claddings service life. The series of tests described in this standard evaluates performance under
a variety of test conditions and exposures. Any given project may not be subject to all of the test conditions described herein and
all of the test methods may not evaluate all exposures for a given project.
These test methods are 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 Sept. 1, 2016Oct. 1, 2018. Published September 2016October 2018. Originally approved in 2012. Last previous edition approved in 20122016
as C1764 – 12.C1764 – 12 (2016). DOI: 10.1520/C1764-12R16.10.1520/C1764-12R18.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1764 − 12 (2018)
4.2 Transverse Load:
4.2.1 This test determines the ultimate wind load resistance of the wall assembly including influence of the framing, sheathing,
and means of attachment.
4.3 Vertical Load:
4.3.1 The weight and attachment mechanism of Portland Cement Based Plaster results in a vertical load transfer to the plaster
base. This test method determines the ultimate vertical load capacity of the cladding assembly based on taking the specimen to
failure.
4.4 Embedment:
4.4.1 Plaster bases serve as a key, reinforcement and attachment mechanism for Portland Cement Based Plaster. The thickness,
profile, and material properties of the plaster bases must be such that it is adequately embedded in the Portland Cement Based
Plaster. This can be accomplished through use of a self furred non metallic plaster base or other means such as furring strips. This
test procedure determines the effectiveness of the furring mechanism to ensure that the minimum embedment is obtained.
4.5 Fastener Pull Through Resistance:
4.5.1 The non metallic lath is secured to the building frame or substrate with fasteners. This test evaluates the fastener
attachment effectiveness.
4.6 Alkali Resistance (Glass Fiber Lath Only):
4.6.1 Per E2098E2098/E2098M.
5. Sampling, Test Specimens, and Test Units
5.1 The number, size and configuration of the test specimens shall be as per each test procedure with the exception of Transverse
Load tests which shall incorporate wood or steel framing as determined by the user. Samples shall be representative of standard
products and construction methods.
6. Test Specimens
6.1 Transverse Load:
6.1.1 Construct three test specimens. Test specimen size shall be minimum 4 ft (1.2 m) by 8 ft (2.4 (1.2 by 2.4 m) and
constructed representative of end use conditions. Framing members shall be wood or steel as determined by the user. C926 Portland
Cement Based Plaster shall be mixed and applied in the configuration of the test specimen.
6.2 Vertical Load:
6.2.1 Construct three test frames measuring 12 inch (305 mm) by 20 inch (508 in. (305 by 508 mm) using nominal 2 inch (50
mm) by 4 inch (100 in. (50 by 100 mm) wood lumber with specific gravity of 0.42. The test frame shall have one intermediate
stud with top and bottom plates and sheathed one side with ⁄2 inchin. (13 mm) thick gypsum sheathing. Attach studs to plates using
2 16d (3 ⁄2 inchin. (89 mm) length) nails and sheathing to framing using 6d (2 inch (2 in. length) common nails or equal fastened
8 inches (200 mm) in. (200 mm) on center. A test panel shall be prepared measuring 6 inchesin. (152 mm) high by 16 inchesin.
(406 mm) wide and consisting of a water-resistive barrier (provided to prevent adhesion of the test panel to the test frame); non
metallic plaster base, which is attached through the water-resistive barrier to the intermediate framing member with one fastener;
and apply Portland Cement Based Plaster per C926. The samples shall be cured a minimum of 28 days. Refer to Fig. 1 for an
i
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