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ASTM E1300-04

(Practice)

Standard Practice for Determining Load Resistance of Glass in Buildings

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.

General Information

Status
Historical
Publication Date
30-Jun-2004
ICS
81.040.30 - Glass products
Technical Committee
E06 - Performance of Buildings
Drafting Committee
E06.51 - Performance of Windows, Doors, Skylights and Curtain Walls
Current Stage
Ref Project

Relations

Replaces
ASTM E1300-03 - Standard Practice for Determining Load Resistance of Glass in Buildings
Effective Date
01-Jul-2004
Replaced By
ASTM E1300-04e1 - Standard Practice for Determining Load Resistance of Glass in Buildings
Effective Date
01-Jul-2004
Referred By
ASTM C1401-23 - Standard Guide for Structural Sealant Glazing
Effective Date
01-Jul-2004
Referred By
ASTM F2248-19 - Standard Practice for Specifying an Equivalent 3-Second Duration Design Loading for Blast Resistant Glazing Fabricated with Laminated Glass
Effective Date
01-Jul-2004
Referred By
ASTM E330/E330M-14(2021) - Standard Test Method for Structural Performance of Exterior Windows, Doors, Skylights and Curtain Walls by Uniform Static Air Pressure Difference
Effective Date
01-Jul-2004
Referred By
ASTM E2461-22 - Standard Practice for Determining the Thickness of Glass in Airport Traffic Control Tower Cabs
Effective Date
01-Jul-2004
Referred By
ASTM C1048-18 - Standard Specification for Heat-Strengthened and Fully Tempered Flat Glass
Effective Date
01-Jul-2004
Referred By
ASTM E1233/E1233M-14(2021) - Standard Test Method for Structural Performance of Exterior Windows, Doors, Skylights, and Curtain Walls by Cyclic Air Pressure Differential
Effective Date
01-Jul-2004
Referred By
ASTM E997-15(2021) - Standard Test Method for Evaluating Glass Breakage Probability Under the Influence of Uniform Static Loads by Proof Load Testing
Effective Date
01-Jul-2004

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ASTM E1300-04 - Standard Practice for Determining Load Resistance of Glass in BuildingsASTM E1300-04 - Standard Practice for Determining Load Resistance of Glass in Buildings
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ASTM E1300-04 - Standard Practice for Determining Load Resistance of Glass in Buildings
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
An American National Standard
Designation: E 1300 – 04
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 (e) 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. 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.
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
CurrenteditionapprovedJuly1,2004.PublishedJuly2004.Originallyapproved Standards volume information, refer to the standard’s Document Summary page on
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.
1

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5.1 This practice is used to determine the LR of specified glass types and constructions exposed to uniform lateral loads.  
5.2 Use of this practice assumes:  
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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.  
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4.1 Measurement—The refractive index at any wavelength of a piece of homogeneous glass is a function, primarily, of its composition, and secondarily, of its state of annealing. The index of a glass can be altered over a range of up to 1×10-4 (that is, 1 in the fourth decimal place) by the changing of an annealing schedule. This is a critical consideration for optical glasses, that is, glasses intended for use in high performance optical instruments where the required value of an index can be as exact as 1×10-6. Compensation for minor variations of composition are made by controlled rates of annealing for such optical glasses; therefore, the ability to measure index to six decimal places can be a necessity; however, for most commercial and experimental glasses, standard annealing schedules appropriate to each are used to limit internal stress and less rigorous methods of test for refractive index are usually adequate. The refractive indices of glass ophthalmic lens pressings are held to 5×10-4 because the tools used for generating the figures of ophthalmic lenses are made to produce curvatures that are related to specific indices of refraction of the lens materials.  
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5.1 It is generally recognized that excess moisture and air within an interlayer will cause bubble formation in a laminate when exposed to heat or UV radiation, or both. These may be caused by initial moisture and air in the interlayer and be generated by thermal exposure. The purpose of this test method is to measure quantitatively the laminate stability under controlled conditions, specifically in relation to the formation of bubbles in the body of the laminate.  
5.2 Subjecting the laminated glazing to extended heat at a controlled temperature and time provides the excess moisture and air which are forced into the interlayer during processing to surface as bubbles. This occurs only if there are excess moisture and air trapped in between the glass. Therefore, making these thermal tests efficient to determine proper de-airing of laminated glass products.  
5.3 This test method provides a means to visually determine if discoloration has or is occurring and serves as a pass/fail test for some aspects of lamination quality.  
5.4 This test method can be performed after natural or accelerated exposure to determine if there are changes to the polymer such as the stability with high temperature which is useful for understanding the visual stability of installed glazing.  
5.5 This test method does not provide an indication of laminated glass capability for impact resistance, glass shard retention on breakage or edge stability of laminated glass.
SCOPE
1.1 The purpose of this test method is to measure quantitatively the laminate stability under controlled conditions, specifically in relation to the formation of bubbles in a laminate with heat exposure.  
1.2 This test method can be performed on laminates which have been exposed to weathering or as manufactured samples to determine the amount of excess air dissolved in the interlayer.  
1.3 This test method determines the stability of laminated glass when subjected to high heat environments.  
1.4 This test method outlines a procedure to be used on laminated glass with two or more layers of glass bonded by an interlayer.  
1.5 This test method covers visual rating of tested specimens.  
1.6 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.  
1.7 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.8 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.

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