ASTM C964-20

Standard Guide for Lock-Strip Gasket Glazing

SIGNIFICANCE AND USE
3.1 This guide provides information and guidelines for the design of lock-strip gasket glazing systems. For related standards, see Specifications C542, C716, and C963.
SCOPE
1.1 This guide covers the use of lock-strip gaskets in compliance with Specification C542 in walls of buildings not over 15° from a vertical plane. The prime performance considerations are weathertightness against air and water infiltration, and structural integrity under wind loads. Included are terminology, design considerations, and fabrication tolerances when using lock-strip gaskets in glazing applications.  
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units in parentheses are for information only.  
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

• Status: Published
• Publication Date: 29-Feb-2020
• ICS: 91.060.50 - Doors and windows
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.73 - Compression Seal and Lock Strip Gaskets

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: C964 − 20
Standard Guide for
1
Lock-Strip Gasket Glazing
This standard is issued under the fixed designation C964; 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 E283 Test Method for Determining Rate of Air Leakage
Through Exterior Windows, Skylights, Curtain Walls, and
1.1 This guide covers the use of lock-strip gaskets in
Doors Under Specified Pressure Differences Across the
compliance with Specification C542 in walls of buildings not
Specimen
over 15° from a vertical plane. The prime performance
E330 Test Method for Structural Performance of Exterior
considerations are weathertightness against air and water
Windows, Doors, Skylights and CurtainWalls by Uniform
infiltration, and structural integrity under wind loads. Included
Static Air Pressure Difference
are terminology, design considerations, and fabrication toler-
E331 Test Method for Water Penetration of Exterior
ances when using lock-strip gaskets in glazing applications.
Windows, Skylights, Doors, and Curtain Walls by Uni-
1.2 The values stated in SI units are to be regarded as the
form Static Air Pressure Difference
standard. The inch-pound units in parentheses are for informa-
tion only.
3. Significance and Use
1.3 This standard does not purport to address all of the
3.1 This guide provides information and guidelines for the
safety concerns, if any, associated with its use. It is the
design of lock-strip gasket glazing systems. For related
responsibility of the user of this standard to establish appro-
standards, see Specifications C542, C716, and C963.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4. Comparison to Other Standards
1.4 This international standard was developed in accor-
4.1 Thecommitteewithjurisdictionoverthisstandardisnot
dance with internationally recognized principles on standard-
aware of any comparable standards published by other orga-
ization established in the Decision on Principles for the
nizations.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
DESIGN CONSIDERATIONS
Barriers to Trade (TBT) Committee.
5. General
2. Referenced Documents
5.1 Structural integrity and watertightness of a gasket glaz-
2
2.1 ASTM Standards:
ing system is dependent on interaction of the several compo-
C542 Specification for Lock-Strip Gaskets
nents involved. These systems should be carefully designed
C716 Specification for Installing Lock-Strip Gaskets and
and built.
Infill Glazing Materials
C864 Specification for Dense Elastomeric Compression Seal
6. Components
Gaskets, Setting Blocks, and Spacers
6.1 The major components of lock-strip gasket glazing and
C963 Specification for Packaging, Identification, Shipment,
paneling systems are:
and Storage of Lock-Strip Gaskets
6.1.1 The supporting frame of metal, concrete, or other
C1036 Specification for Flat Glass
structural building materials,
6.1.2 Lock-strip gasket, serving as an elastomeric mechani-
cal seal and as a retainer for panel or glass, and
1
ThisguideisunderthejurisdictionofASTMCommitteeC24onBuildingSeals
and Sealants and is the direct responsibility of Subcommittee C24.73 on Compres- 6.1.3 Glass or panel infill.
sion Seal and Lock Strip Gaskets.
6.1.4 The design of these components and their accessories
Current edition approved March 1, 2020. Published April 2020. Originally
are interrelated and the total system must be compatible.
approved in 1981. Last previous edition approved in 2019 as C964 – 19. DOI:
10.1520/C0964-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 7. Supporting Frames
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
7.1 Supporting frames are made of many materials, of
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. which the more common are aluminum, steel, and concrete.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C964 − 20
7.1.1 Metal—Die marks, ridges, offsets, and scratches in be solidly cast into the concrete without any voids or honey-
metal frames in contact with the gasket lips that could cause combing at the leading edge of the flange because water could
leakage should be avoided. Metal in contact with any
...

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: C964 − 19 C964 − 20
Standard Guide for
1
Lock-Strip Gasket Glazing
This standard is issued under the fixed designation C964; 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 guide covers the use of lock-strip gaskets in compliance with Specification C542 in walls of buildings not over 15°
from a vertical plane. The prime performance considerations are weathertightness against air and water infiltration, and structural
integrity under wind loads. Included are terminology, design considerations, and fabrication tolerances when using lock-strip
gaskets in glazing applications.
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units in parentheses are for information only.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
C542 Specification for Lock-Strip Gaskets
C716 Specification for Installing Lock-Strip Gaskets and Infill Glazing Materials
C864 Specification for Dense Elastomeric Compression Seal Gaskets, Setting Blocks, and Spacers
C963 Specification for Packaging, Identification, Shipment, and Storage of Lock-Strip Gaskets
C1036 Specification for Flat Glass
E283 Test Method for Determining Rate of Air Leakage Through Exterior Windows, Skylights, Curtain Walls, and Doors Under
Specified Pressure Differences Across the Specimen
E330 Test Method for Structural Performance of Exterior Windows, Doors, Skylights and Curtain Walls by Uniform Static Air
Pressure Difference
E331 Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air
Pressure Difference
3. Significance and Use
3.1 This guide provides information and guidelines for the design of lock-strip gasket glazing systems. For related standards,
see Specifications C542, C716, and C963.
4. Comparison to Other Standards
4.1 The committee with jurisdiction over this standard is not aware of any comparable standards published by other
organizations.
1
This guide is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.73 on Compression
Seal and Lock Strip Gaskets.
Current edition approved Aug. 1, 2019March 1, 2020. Published September 2019April 2020. Originally approved in 1981. Last previous edition approved in 20122019
as C964 – 07 (2012).C964 – 19. DOI: 10.1520/C0964-19.10.1520/C0964-20.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C964 − 20
DESIGN CONSIDERATIONS
5. General
5.1 Structural integrity and watertightness of a gasket glazing system is dependent on interaction of the several components
involved. These systems should be carefully designed and built.
6. Components
6.1 The major components of lock-strip gasket glazing and paneling systems are:
6.1.1 The supporting frame of metal, concrete, or other structural building materials,
6.1.2 Lock-strip gasket, serving as an elastomeric mechanical seal and as a retainer for panel or glass, and
6.1.3 Glass or panel infill.
6.1.4 The design of these components and their accessories are interrelated and the total system must be compatible.
7. Supporting Frames
7.1 Supporting frames are made of many materials, of which the more common are aluminum, steel, and concrete.
7.1.1 Metal—Die m
...