ASTM C1788-14(2019)

Standard Specification for Non Metallic Plaster Bases (Lath) Used with Portland Cement Based Plaster in Vertical Wall Applications

SCOPE
1.1 This standard provides the minimum specification for use of non metallic plaster bases with portland cement based plaster in vertical wall applications.  
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 Details of construction for a specific assembly to achieve the required fire resistance, sound or acoustic rating shall be obtained from reports of fire-resistance tests, engineering evaluations, or listings from recognized fire testing, sound or acoustic laboratories.  
1.4 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.  
1.5 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: 28-Feb-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

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C1788 −14 (Reapproved 2019)
Standard Specification for
Non Metallic Plaster Bases (Lath) Used with Portland
Cement Based Plaster in Vertical Wall Applications
This standard is issued under the fixed designation C1788; 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 E631 Terminology of Building Constructions
C1764 Test Methods for Non Metallic Plaster Bases (Lath)
1.1 This standard provides the minimum specification for
Used with Portland Cement Based Plaster in Vertical Wall
use of non metallic plaster bases with portland cement based
Applications
plaster in vertical wall applications.
1.2 Units—The values stated in either SI units or inch-
3. Terminology
pound units are to be regarded separately as standard. The
3.1 Definitions—For definitions of terms used in these test
values stated in each system may not be exact equivalents;
methods, See Terminology E631.
therefore, each system shall be used independently of the other.
Combining values from the two systems may result in non- 3.2 Definitions of Terms Specific to This Standard:
conformance with the standard.
3.2.1 portland cement based plaster, n—in accordance with
Specification C926.
1.3 Details of construction for a specific assembly to
achieve the required fire resistance, sound or acoustic rating 3.2.2 non metallic plaster base (lath), n—material used as a
base for portland cement based plaster that is flat or self furred,
shall be obtained from reports of fire-resistance tests, engineer-
ing evaluations, or listings from recognized fire testing, sound that meets or exceeds the requirements set forth in Table 1.
or acoustic laboratories.
4. Inspection
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 4.1 Inspection of the material shall be agreed upon between
responsibility of the user of this standard to establish appro-
the purchaser and producer or supplier as part of the purchase
priate safety, health, and environmental practices and deter- agreement.
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
5. Rejection
dance with internationally recognized principles on standard-
5.1 Material that fails to conform to the requirements of this
ization established in the Decision on Principles for the
specification may be rejected. Rejection should be reported to
Development of International Standards, Guides and Recom-
the producer or supplier promptly and in writing. In case of
mendations issued by the World Trade Organization Technical
dissatisfaction with the results of the test, the producer or
Barriers to Trade (TBT) Committee.
supplier may make claim for a rehearing.
2. Referenced Documents
6. Product Packaging
2.1 ASTM Standards:
6.1 Nonmetallicplasterbasesshallbepackagedinsheetsor
C926 Specification for Application of Portland Cement-
rolls in sizes that is convenient for shipping, handling as well
Based Plaster
as application.
This test method is under the jurisdiction ofASTM Committee C11 on Gypsum
7. Product Marking
and Related Building Materials and Systems and is the direct responsibility of
7.1 Markings shall include the name of the producer and
Subcommittee C11.02 on Specifications and Test Methods for A
...

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: C1788 − 14 C1788 − 14 (Reapproved 2019)
Standard Specification for
Non Metallic Plaster Bases (Lath) Used with Portland
Cement Based Plaster in Vertical Wall Applications
This standard is issued under the fixed designation C1788; 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 standard provides the minimum specification for use of non metallic plaster bases with portland cement based plaster
in vertical wall applications.
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 Details of construction for a specific assembly to achieve the required fire resistance, sound or acoustic rating shall be
obtained from reports of fire-resistance tests, engineering evaluations, or listings from recognized fire testing, sound or acoustic
laboratories.
1.4 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.
1.5 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
E631 Terminology of Building Constructions
C1764 Test Methods for Non Metallic Plaster Bases (Lath) Used with Portland Cement Based Plaster in Vertical Wall
Applications
3. Terminology
3.1 Definitions—For definitions of terms used in these test methods, See Terminology E631.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 portland cement based plaster, n—in accordance with Specification C926.
3.2.2 non metallic plaster base (lath), n—material used as a base for portland cement based plaster that is flat or self furred,
that meets or exceeds the requirements set forth in Table 1.
4. Inspection
4.1 Inspection of the material shall be agreed upon between the purchaser and producer or supplier as part of the purchase
agreement.
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 Feb. 1, 2014March 1, 2019. Published April 2014March 2019. Originally approved in 2014. Last previous edition approved in 2014 as
C1788 – 14. DOI: 10.1520/C1788-14.10.1520/C1788-14R19.
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
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