ASTM C964-20

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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
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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
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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.
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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.
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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.
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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
...