ASTM E1300-24
(Practice)Standard Practice for Determining Load Resistance of Glass in Buildings
Standard Practice for Determining Load Resistance of Glass in Buildings
SIGNIFICANCE AND USE
6.1 This practice is used to determine the LR of specified glass types and constructions exposed to uniform lateral loads.
6.2 Use of this practice assumes:
6.2.1 The glass is free of edge damage and is properly glazed.
6.2.2 The glass has not been subjected to abuse.
6.2.3 The surface condition of the glass is typical of glass that has been in service for several years, and is weaker than freshly manufactured glass due to minor abrasions on exposed surfaces.
6.2.4 The glass edge support system is sufficiently stiff to limit the lateral deflections of the supported glass edges to no more than 1/175 of their lengths. The specified design load shall be used for this calculation.
6.2.5 The deflection of glass or support system, or both, shall not result in loss of glass edge support. The glass bite reduction or pullout shall be considered using the method referenced in (1).3
Note 2: Glass deflections are to be reviewed. This practice does not address aesthetic issues caused by glass deflection.
Note 3: This practice does not consider the effects of deflection on insulating glass unit seal performance.
Note 4: The designer/engineer must determine what constitutes sufficient glass edge support based on Annex A1, Non-Factored Load Charts.
6.3 Many other factors shall be considered in glass type and thickness selection. These factors include but are not limited to: thermal stresses, spontaneous breakage of tempered glass, the effects of windborne debris, excessive deflections, behavior of glass fragments after breakage, blast, seismic effects, building movement, heat flow, edge bite, noise abatement, and potential post-breakage consequences. In addition, considerations set forth in building codes along with criteria presented in safety-glazing standards and site-specific concerns may control the ultimate glass type and thickness selection.
6.4 For situations not specifically addressed in this standard, the design professional shall use enginee...
SCOPE
1.1 This practice covers procedures to determine the load resistance (LR) of specified glass types, including combinations of glass types used in a sealed insulating glass (IG) unit, exposed to a uniform lateral load of short or long duration, for a specified probability of breakage.
1.2 This practice applies to vertical and sloped glazing in buildings for which the specified design loads consist of wind load, snow load and self-weight with a total combined magnitude less than or equal to 15 kPa (315 psf). This practice shall not apply to other applications including, but not limited to, balustrades, glass floor panels, aquariums, structural glass members, and glass shelves.
1.3 This practice applies only to monolithic and laminated glass constructions of rectangular shape with continuous lateral support along one, two, three, or four edges. This practice assumes that (1) the supported glass edges for two, three, and four-sided support conditions are simply supported and free to slip in plane; (2) glass supported on two sides acts as a simply supported beam; and (3) glass supported on one side acts as a cantilever. For insulating glass units, this practice only applies to insulating glass units with four-sided edge support.
1.4 This practice does not apply to any form of wired, patterned, sandblasted, drilled, notched, or grooved glass. This practice does not apply to glass with surface or edge treatments that reduce the glass strength.
Note 1: Ceramic enamel is known to affect glass load resistance. Consult the manufacturer for guidance.
1.5 This practice addresses only the determination of the resistance of glass to uniform lateral loads. The final thickness and type of glass selected also depends upon a variety of other factors (see 6.3).
1.6 Charts in this practice provide a means to determine approximate maximum lateral glass deflection. Appendix X1 provides additional procedures to determine maximu...
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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: E1300 − 24
Standard Practice for
1
Determining Load Resistance of Glass in Buildings
This standard is issued under the fixed designation E1300; 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 1.7 Appendix X2 lists the key variables used in calculating
the mandatory type factors in Tables 1-3 and comments on
1.1 This practice covers procedures to determine the load
their conservative values.
resistance (LR) of specified glass types, including combina-
tions of glass types used in a sealed insulating glass (IG) unit, 1.8 The values stated in SI units are to be regarded as
exposed to a uniform lateral load of short or long duration, for standard. The values given in parentheses after SI units are
a specified probability of breakage. provided for information only and are not considered standard.
1.9 This standard does not purport to address all of the
1.2 This practice applies to vertical and sloped glazing in
safety concerns, if any, associated with its use. It is the
buildings for which the specified design loads consist of wind
responsibility of the user of this standard to establish appro-
load, snow load and self-weight with a total combined magni-
priate safety, health, and environmental practices and deter-
tude less than or equal to 15 kPa (315 psf). This practice shall
mine the applicability of regulatory limitations prior to use.
not apply to other applications including, but not limited to,
1.10 This international standard was developed in accor-
balustrades, glass floor panels, aquariums, structural glass
dance with internationally recognized principles on standard-
members, and glass shelves.
ization established in the Decision on Principles for the
1.3 This practice applies only to monolithic and laminated
Development of International Standards, Guides and Recom-
glass constructions of rectangular shape with continuous lateral
mendations issued by the World Trade Organization Technical
support along one, two, three, or four edges. This practice
Barriers to Trade (TBT) Committee.
assumes that (1) the supported glass edges for two, three, and
four-sided support conditions are simply supported and free to
2. Referenced Documents
slip in plane; (2) glass supported on two sides acts as a simply
2
2.1 ASTM Standards:
supported beam; and (3) glass supported on one side acts as a
C1036 Specification for Flat Glass
cantilever. For insulating glass units, this practice only applies
C1048 Specification for Heat-Strengthened and Fully Tem-
to insulating glass units with four-sided edge support.
pered Flat Glass
1.4 This practice does not apply to any form of wired,
C1172 Specification for Laminated Architectural Flat Glass
patterned, sandblasted, drilled, notched, or grooved glass. This
D4065 Practice for Plastics: Dynamic Mechanical Proper-
practice does not apply to glass with surface or edge treatments
ties: Determination and Report of Procedures
that reduce the glass strength.
E631 Terminology of Building Constructions
NOTE 1—Ceramic enamel is known to affect glass load resistance.
Consult the manufacturer for guidance. 3. Terminology
1.5 This practice addresses only the determination of the
3.1 Definitions:
resistance of glass to uniform lateral loads. The final thickness
3.1.1 Refer to Terminology E631 for additional terms used
and type of glass selected also depends upon a variety of other
in this practice.
factors (see 6.3).
3.2 Definitions of Terms Specific to This Standard:
3.2.1 acid etched glass, n—glass surface that has been
1.6 Charts in this practice provide a means to determine
treated primarily with hydrofluoric acid and potentially in
approximate maximum lateral glass deflection. Appendix X1
combination with other agents. Acid etched glass strength shall
provides additional procedures to determine maximum lateral
be considered as equivalent to float glass in this practice
deflection for glass simply supported on four sides.
provided the glass thickness conforms to Specification C1036.
1
This practice is under the jurisdiction of ASTM Committee E06 on Perfor-
mance of Buildings and is the direct responsibility of Subcommittee E06.52 on
2
Glass Use in Buildings. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved March 1, 2024. Published April 2024. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1989. Last previous edition approve
...
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: E1300 − 16 E1300 − 24
Standard Practice for
1
Determining Load Resistance of Glass in Buildings
This standard is issued under the fixed designation E1300; 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 practice describescovers procedures to determine the load resistance (LR) of specified glass types, including
combinations of glass types used in a sealed insulating glass (IG) unit, exposed to a uniform lateral load of short or long duration,
for a specified probability of breakage.
1.2 This practice applies to vertical and sloped glazing in buildings for which the specified design loads consist of wind load, snow
load and self-weight with a total combined magnitude less than or equal to 15 kPa (315 psf). This practice shall not apply to other
applications including, but not limited to, balustrades, glass floor panels, aquariums, structural glass members, and glass shelves.
1.3 This practice applies only to monolithic and laminated glass constructions of rectangular shape with continuous lateral support
along one, two, three, or four edges. This practice assumes that (1) the supported glass edges for two, three, and four-sided support
conditions are simply supported and free to slip in plane; (2) glass supported on two sides acts as a simply supported beam; and
(3) glass supported on one side acts as a cantilever. For insulating glass units, this practice only applies to insulating glass units
with four-sided edge support.
1.4 This practice does not apply to any form of wired, patterned, sandblasted, drilled, notched, or grooved glass. This practice does
not apply to glass with surface or edge treatments that reduce the glass strength.
NOTE 1—Ceramic enamel is known to affect glass load resistance. Consult the manufacturer for guidance.
1.5 This practice addresses only the determination of the resistance of glass to uniform lateral loads. The final thickness and type
of glass selected also depends upon a variety of other factors (see 5.36.3).
1.6 Charts in this practice provide a means to determine approximate maximum lateral glass deflection. Appendix X1 provides
additional procedures to determine maximum lateral deflection for glass simply supported on four sides.
1.7 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for mathematical
conversions to inch-pound units that are provided for information only and are not considered standard.
1.7 Appendix X2 lists the key variables used in calculating the mandatory type factors in Tables 1-3 and comments on their
conservative values.
1
This practice is under the jurisdiction of ASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.52 on Glass Use in
Buildings.
Current edition approved June 1, 2016March 1, 2024. Published August 2016April 2024. Originally approved in 1989. Last previous edition approved in 20122016 as
ɛ1
E1300 – 12aE1300 – 16. . DOI: 10.1520/E1300-16.10.1520/E1300-24.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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E1300 − 24
TABLE 1 Glass Type Factors (GTF) for a Single Lite of Monolithic
or Laminated Glass (LG)
GTF
Long Duration Load
Glass Type Short Duration Load (3 s)
(30 days)
AN 1.0 0.43
HS 2.0 1.3
FT 4.0 3.0
TABLE 2 Glass Type Factors (GTF) for Double Glazed Insulating
Glass (IG), Short Duration Load
Lite No. 2
Lite No. 1
Monolithic Glass or Laminated Glass Type
Monolithic Glass or
Laminated Glass AN HS FT
Type
GTF1 GTF2 GTF1 GTF2 GTF1 GTF2
AN 0.9 0.9 1.0 1.9 1.0 3.8
HS 1.9 1.0 1.8 1.8 1.9 3.8
FT 3.8 1.0 3.8 1.9 3.6 3.6
TABLE 3 Glass Type Factors (GTF) for Double Glazed Insulating
Glass (IG), Long Duration Load (30 day)
Lite No. 2
Lite No. 1
Monolithic Glass or Laminated Glass Type
Monolithic Glass or
Laminated Glass AN HS FT
Type
GTF1 GTF2 GTF1 GTF2 GTF1 GTF2
AN 0.39 0.39 0.43 1.25 0.43 2.85
HS 1.25 0.43 1.17 1.17 1.25 2.85
FT 2.85 0.43 2.85 1.25 2.71 2.71
1.8 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for
information only and are not considered standard.
1.9 This standard does not purport to address all of the safety concerns, if an
...
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