ASTM E1300-12a
(Practice)Standard Practice for Determining Load Resistance of Glass in Buildings
Standard Practice for Determining Load Resistance of Glass in Buildings
SIGNIFICANCE AND USE
This practice is used to determine the LR of specified glass types and constructions exposed to uniform lateral loads.
Use of this practice assumes:
The glass is free of edge damage and is properly glazed,
The glass has not been subjected to abuse,
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,
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.
The center of glass deflection will not result in loss of edge support.
Note 1—This practice does not address aesthetic issues caused by glass deflection.
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, seismic effects, heat flow, edge bite, noise abatement, potential post-breakage consequences, and so forth. 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.
For situations not specifically addressed in this standard, the design professional shall use engineering analysis and judgment to determine the LR of glass in buildings.
SCOPE
1.1 This practice describes 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, etched, sandblasted, drilled, notched, or grooved glass with surface and edge treatments that alter the glass strength.
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 5.3).
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.
1.8 Appendix X2 lists the key variables used in calculating the mandatory type factors in Tables 1-3 and comments on their conservative values.
1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It i...
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Designation: E1300 − 12a
StandardPractice 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.Anumber 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 The values stated in SI units are to be regarded as the
standard.Thevaluesgiveninparenthesesareformathematical
1.1 Thispracticedescribesprocedurestodeterminetheload
conversions to inch-pound units that are provided for informa-
resistance (LR) of specified glass types, including combina-
tion only and are not considered standard.
tions of glass types used in a sealed insulating glass (IG) unit,
1.8 Appendix X2 lists the key variables used in calculating
exposed to a uniform lateral load of short or long duration, for
the mandatory type factors in Tables 1-3 and comments on
a specified probability of breakage.
their conservative values.
1.2 This practice applies to vertical and sloped glazing in
1.9 This standard does not purport to address all of the
buildings for which the specified design loads consist of wind
safety concerns, if any, associated with its use. It is the
load, snow load and self-weight with a total combined magni-
responsibility of the user of this standard to establish appro-
tude less than or equal to 15 kPa (315 psf). This practice shall
priate safety and health practices and determine the applica-
not apply to other applications including, but not limited to,
bility of regulatory limitations prior to use.
balustrades, glass floor panels, aquariums, structural glass
members, and glass shelves.
2. Referenced Documents
2
1.3 This practice applies only to monolithic and laminated
2.1 ASTM Standards:
glassconstructionsofrectangularshapewithcontinuouslateral
C1036Specification for Flat Glass
support along one, two, three, or four edges. This practice
C1048Specification for Heat-Strengthened and Fully Tem-
assumes that (1) the supported glass edges for two, three, and
pered Flat Glass
four-sided support conditions are simply supported and free to
C1172Specification for Laminated Architectural Flat Glass
slip in plane; (2) glass supported on two sides acts as a simply
D4065Practice for Plastics: Dynamic Mechanical Proper-
supported beam; and (3) glass supported on one side acts as a
ties: Determination and Report of Procedures
cantilever. For insulating glass units, this practice only applies
E631Terminology of Building Constructions
to insulating glass units with four-sided edge support.
3. Terminology
1.4 This practice does not apply to any form of wired,
3.1 Definitions:
patterned, etched, sandblasted, drilled, notched, or grooved
3.1.1 Refer to Terminology E631 for additional terms used
glass with surface and edge treatments that alter the glass
in this practice.
strength.
3.2 Definitions of Terms Specific to This Standard:
1.5 This practice addresses only the determination of the
3.2.1 aspect ratio (AR), n—for glass simply supported on
resistance of glass to uniform lateral loads. The final thickness
four sides, the ratio of the long dimension of the glass to the
and type of glass selected also depends upon a variety of other
short dimension of the glass is always equal to or greater than
factors (see 5.3).
1.0. For glass simply supported on three sides, the ratio of the
length of one of the supported edges perpendicular to the free
1.6 Charts in this practice provide a means to determine
approximate maximum lateral glass deflection. Appendix X1 edge, to the length of the free edge, is equal to or greater than
0.5.
provides additional procedures to determine maximum lateral
deflection for glass simply supported on four sides.
3.2.2 etched glass, n—glass surface that has been attacked
with hydrofluoric acid or other agent, generally for marking or
decoration.
1
This practice is under the jurisdiction of ASTM Committee E06 on Perfor-
mance of Buildings and is the direct responsibility of Subcommittee E06.51 on
2
Performance of Windows, Doors, Skylights and Curtain Walls. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2012. Published June 2012. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1989. Last previous edition approved in 2012 as E1300–12. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E1300-12A. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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E1300 − 12a
TABLE 1 Glass Type Factors (GT
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:E1300–12 Designation: E1300 – 12a
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.Anumber 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 describes 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.
1.2This1.2 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
supportalongone,two,three,orfouredges.Thispracticeassumesthat(1)thesupportedglassedgesfortwo,three,andfour-sided
supportconditionsaresimplysupportedandfreetoslipinplane;(2)glasssupportedontwosidesactsasasimplysupportedbeam;
and(3)glasssupportedononesideactsasacantilever.Forinsulatingglassunits,thispracticeonlyappliestoinsulatingglassunits
with four-sided edge support.
1.4 This practice does not apply to any form of wired, patterned, etched, sandblasted, drilled, notched, or grooved glass with
surface and edge treatments that alter the glass strength.
1.5 Thispracticeaddressesonlythedeterminationoftheresistanceofglasstouniformlateralloads.Thefinalthicknessandtype
of glass selected also depends upon a variety of other factors (see 5.3).
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.Appendix X2 presents a
proceduretocomputeapproximateprobabilityofbreakageforannealed(AN)monolithicglasslitessimplysupportedonfoursides.
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.
1.8 Appendix X3 Appendix X2 lists the key variables used in calculating the mandatory type factors in Tables 1-3 and
comments on their conservative values.
1.9 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C1036 Specification for Flat Glass
C1048 Specification for Heat-Strengthened and Fully Tempered Flat Glass
C1172 Specification for Laminated Architectural Flat Glass
D4065 Practice for Plastics: Dynamic Mechanical Properties: Determination and Report of Procedures
E631 Terminology of Building Constructions
3. Terminology
3.1 Definitions:
3.1.1 Refer to Terminology E631 for additional terms used in this practice.
1
This practice is under the jurisdiction ofASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.51 on Performance
of Windows, Doors, Skylights and Curtain Walls.
CurrenteditionapprovedApril15,May1,2012.PublishedJune2012.Originallyapprovedin1989.Lastpreviouseditionapprovedin20092012asE1300–09a.E1300–12.
DOI: 10.1520/E1300-12A.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.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 ----------------------
E1300 – 12a
TABLE 1 Glass Type Factors (GTF) for a Single Lite of
Monolithic or Laminated Glass (LG)
GTF
Glass Type Short Duration L
...
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