ASTM C1036-21

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:C1036 −21
Standard Specification for
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Flat Glass
This standard is issued under the fixed designation C1036; 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 2. Referenced Documents
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2.1 ASTM Standard:
1.1 This specification covers the requirements for annealed,
C162 Terminology of Glass and Glass Products
monolithic flat soda-lime glass supplied as cut sizes or stock
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sheets.
2.2 NFRC Standard:
NFRC 300 Test Method for Determining the Solar Optical
1.2 This specification is focused upon the quality of flat
Properties of Glazing Materials and Systems
glass as produced. The specification is applicable for labora-
tory and field evaluation only to the extent that such evaluation
3. Terminology
can be carried out in accordance with the test method(s)
3.1 Definitions:
prescribed herein.
3.1.1 For additional definitions of terms, refer to Terminol-
1.3 This specification covers the quality requirements of
ogy C162.
flat, transparent, clear, low-iron, and tinted glass. This glass is
3.2 Definitions of Key Terms:
intended to be used primarily for architectural glazing products
3.2.1 associated distortion, n—alteration of viewed images
such as coated glass, insulating glass units, laminated glass,
caused by variations in glass flatness or inhomogeneous
mirrors, and spandrel glass.
portions within the glass.
NOTE 1—Reflective distortion is not addressed in this specification.
3.2.2 bevel, n—angled surface at the edge of a lite of glass.
1.4 This specification covers the quality requirements of
3.2.3 blemish, n—imperfection in the body or on the surface
patterned or wired glasses intended to be used primarily for
of the glass; for the purpose of this specification, blemishes are
decorative and general glazing applications.
divided into two categories; blemishes not specifically men-
tioned shall each be compared to the blemish that they most
1.5 The values stated in SI units are to be regarded as
closely resemble.
standard. The values given in parentheses after SI units are
3.2.3.1 linear blemish, n—scratches, rubs, digs, and other
provided for information only and are not considered standard.
similar imperfections, which may be straight or curved in
1.6 This standard does not purport to address all of the
nature; if curved, the length of such a blemish is to be
safety concerns, if any, associated with its use. It is the
measured from end to end along the curve.
responsibility of the user of this standard to establish appro-
3.2.3.2 point blemish, n—crush, knots, dirt, stones, gaseous
priate safety, health, and environmental practices and deter-
inclusions, tin drip, and other similar imperfections.
mine the applicability of regulatory limitations prior to use.
3.2.4 bow, n—the deviation in flatness of a lite of glass,
1.7 This international standard was developed in accor-
expressed over the entire width or length dimension of the lite
dance with internationally recognized principles on standard-
or over a smaller, local span.
ization established in the Decision on Principles for the
3.2.5 chip, n—indentation in the glass edge as a result of
Development of International Standards, Guides and Recom-
breakage of a small fragment; chips fall into two categories:
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
3.2.5.1 shell chip, n—any chip other than a v-chip.
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This specification is under the jurisdiction of ASTM Committee C14 on Glass For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and Glass Products and is the direct responsibility of Subcommittee C14.08 on Flat contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Glass. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved April 1, 2021. Published May 2021. Originally the ASTM website.
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approved in 1985. Last previous edition approved in 2016 as C1036 – 16. DOI: Available from National Fenestration Rating Council (NFRC), 6305 Ivy Ln.,
10.1520/C1036-21. Suite 140, Greenbelt, MD 20770, http://www.nfrc.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C1036−21
3.2.5.2 v-chip, n—a chip forming an acute angle, located at one or more of the followin
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