Standard Practice for Determining Load Resistance of Glass in Buildings

SCOPE
1.1 This practice describes procedures to determine the load resistance of specified glass types, including combinations of glass types used in a sealed insulating glass 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 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.

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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e1
Designation: E 1300 – 04
Standard Practice for
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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 (e) indicates an editorial change since the last revision or reapproval.
1
e NOTE—Minor editorial changes were made throughout in July 2004.
1. Scope 1.7 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
1.1 Thispracticedescribesprocedurestodeterminetheload
only. For conversion of quantities in various systems of
resistance of specified glass types, including combinations of
measurements to SI units refer to SI10.
glass types used in a sealed insulating glass unit, exposed to a
1.8 Appendix X4 lists the key variables used in calculating
uniform lateral load of short or long duration, for a specified
the mandatory type factors in Tables 1-3 and comments on
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 10 kPa (210 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
1.3 This practice applies only to monolithic, laminated, or
2
2.1 ASTM Standards:
insulating glass constructions of rectangular shape with con-
C1036 Specification for Flat Glass
tinuouslateralsupportalongone,two,threeorfouredges.This
C1048 Specification for Heat-Treated Flat Glass-Kind HS,
practice assumes that (1) the supported glass edges for two,
Kind FT Coated and Uncoated Glass
three and four sided support conditions are simply supported
C1172 SpecificationforLaminatedArchitecturalFlatGlass
and free to slip in plane (2) glass supported on two sides acts
D4065 Practice for Plastics: Dynamic Mechanical Proper-
as a simply supported beam, and (3) glass supported on one
ties, Determination and Report of Procedure
side acts as a cantilever.
E631 Terminology of Building Constructions
1.4 This practice does not apply to any form of wired,
SI10 Practice for Use of the International System of Units
patterned, etched, sandblasted, drilled, notched or grooved
(SI) (the Modernized Metric System)
glass with surface and edge treatments that alter the glass
strength.
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 5.3).
3.2 Definitions of Terms Specific to This Standard:
1.6 Charts in this practice provide a means to determine
3.2.1 aspect ratio (AR), n—for glass simply supported on
approximate maximum lateral glass deflection. Appendix X1
four sides, the ratio of the long dimension of the glass to the
and Appendix X2 provide additional procedures to determine
short dimension of the glass is always equal to or greater than
maximum lateral deflection for glass simply supported on four
1.0. For glass simply supported on three sides, the ratio of the
sides. Appendix X3 presents a procedure to compute approxi-
length of one of the supported edges perpendicular to the free
mate probability of breakage for annealed monolithic glass
edge, to the length of the free edge, is equal to or greater than
lites simply supported on four sides.
0.5.
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This practice is under the jurisdiction of ASTM Committee E06 on Perfor-
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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 July 19, 2004. Published July 2004. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1989. Last previous edition approved in 2003 as E1300–03. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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