ASTM E1300-09
(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 10 kPa (210 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, laminated, or insulating 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.
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 and Appendix X2 provide additional procedures to determine maximum lateral deflection for glass simply supported on four sides. Appendix X3 presents a procedure to compute approximate probability of breakage for annealed (AN) monolithic glass lites 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 information only. For conversion of quantities in various systems of measurements to SI units, refer to SI 10.
1.8 Appendix X4 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 al...
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Designation: E 1300 – 09
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 only. For conversion of quantities in various systems of
measurements to SI units, refer to SI10.
1.1 Thispracticedescribesprocedurestodeterminetheload
1.8 Appendix X4 lists the key variables used in calculating
resistance (LR) of specified glass types, including combina-
the mandatory type factors in Tables 1-3 and comments on
tions of glass types used in a sealed insulating glass (IG) unit,
their conservative values.
exposed to a uniform lateral load of short or long duration, for
1.9 This standard does not purport to address all of the
a specified probability of breakage.
safety concerns, if any, associated with its use. It is the
1.2 This practice applies to vertical and sloped glazing in
responsibility of the user of this standard to establish appro-
buildings for which the specified design loads consist of wind
priate safety and health practices and determine the applica-
load, snow load and self-weight with a total combined magni-
bility of regulatory limitations prior to use.
tude less than or equal to 10 kPa (210 psf). This practice shall
not apply to other applications including, but not limited to,
2. Referenced Documents
balustrades, glass floor panels, aquariums, structural glass
2
2.1 ASTM Standards:
members, and glass shelves.
C1036 Specification for Flat Glass
1.3 This practice applies only to monolithic, laminated, or
C1048 Specification for Heat-Treated Flat Glass—Kind
insulating glass constructions of rectangular shape with con-
HS, Kind FT Coated and Uncoated Glass
tinuous lateral support along one, two, three, or four edges.
C1172 SpecificationforLaminatedArchitecturalFlatGlass
This practice assumes that (1) the supported glass edges for
D4065 Practice for Plastics: Dynamic Mechanical Proper-
two, three, and four-sided support conditions are simply
ties: Determination and Report of Procedures
supported and free to slip in plane; (2) glass supported on two
E631 Terminology of Building Constructions
sides acts as a simply supported beam; and (3) glass supported
SI10 Practice for Use of the International System of Units
on one side acts as a cantilever.
(SI) (the Modernized Metric System)
1.4 This practice does not apply to any form of wired,
patterned, etched, sandblasted, drilled, notched, or grooved
3. Terminology
glass with surface and edge treatments that alter the glass
3.1 Definitions:
strength.
3.1.1 Refer to Terminology E631 for additional terms used
1.5 This practice addresses only the determination of the
in this practice.
resistance of glass to uniform lateral loads. The final thickness
3.2 Definitions of Terms Specific to This Standard:
and type of glass selected also depends upon a variety of other
3.2.1 aspect ratio (AR), n—for glass simply supported on
factors (see 5.3).
four sides, the ratio of the long dimension of the glass to the
1.6 Charts in this practice provide a means to determine
short dimension of the glass is always equal to or greater than
approximate maximum lateral glass deflection. Appendix X1
1.0. For glass simply supported on three sides, the ratio of the
and Appendix X2 provide additional procedures to determine
length of one of the supported edges perpendicular to the free
maximum lateral deflection for glass simply supported on four
edge, to the length of the free edge, is equal to or greater than
sides. Appendix X3 presents a procedure to compute approxi-
0.5.
mate probability of breakage for annealed (AN) monolithic
3.2.2 etched glass, n—glass surface that has been attacked
glass lites simply supported on four sides.
with hydrofluoric acid or other agent, generally for marking or
1.7 The values stated in SI units are to be regarded as the
decoration.
standard. The values given in parentheses are for information
3.2.3 glass breakage, n—the fracture of any lite or ply in
monolithic, laminated, or insulating glass.
1
This practice is under the jurisdiction of ASTM Committee E06 on Perfor-
2
mance of Buildings and is the direct responsibility of Subcommittee E06.51 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Performance of Windows, Doors, Skylights and Curtain Walls. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved May 1, 2009. Published June 2009. Originally Standards volume information, refer to the standard’s Document Summary page on
´1
approved in 1989. Last previous
...
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.
´1
Designation:E1300–07 Designation: E 1300 – 09
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
´ NOTE—Editorially corrected figure references in October 2007
1. Scope
1.1 This practice describes procedures to determine the load resistance (LR) of specified glass types, including combinations
ofglasstypesusedinasealedinsulatingglass(IG)unit,exposedtoauniformlateralloadofshortorlongduration,foraspecified
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 10 kPa (210 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, laminated, or insulating 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,beam; and (3) glass supported on one side acts as a cantilever.
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 and
Appendix X2 provide additional procedures to determine maximum lateral deflection for glass simply supported on four sides.
Appendix X3 presents a procedure to compute approximate probability of breakage for annealed (AN) monolithic glass lites
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 information only.
For conversion of quantities in various systems of measurements to SI units, refer to SI 10.
1.8 Appendix X4 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-Treated Flat GlassKind HS, Kind FT Coated and Uncoated 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
SI10 Practice for Use of the International System of Units (SI) (the Modernized Metric System)
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.
Current edition approved Sept.May 1, 2007.2009. Published October 2007.June 2009. Originally approved in 1989. Last previous edition approved in 20042007 as
´1
E1300–047 .
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.
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E1300–09
TABLE 1 Glass Type Factors (GTF) for a Single Lite of
Monolithic or Laminated Glass (LG)
GTF
Glass Type Short Duration Load (3 sec) Long Duration Load (30 day)
AN 1.0 0.43
HS 2.0 1.3
FT 4.0 3.0
TABLE 2
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