ASTM F1642-04
(Test Method)Standard Test Method for Glazing and Glazing Systems Subject to Airblast Loadings
Standard Test Method for Glazing and Glazing Systems Subject to Airblast Loadings
SIGNIFICANCE AND USE
This test method provides a structured procedure to establish the hazard rating of glazing and glazing systems subjected to an airblast loading. Knowing the hazard rating provides the ability to assess the risk of personal injury and facility damage.
The hazard rating for a glazing or glazing material does not imply that a single specimen will resist the specific airblast for which it is rated with a probability of 1.0. The probability that a single glazing or glazing construction specimen will resist the specific airblast for which it is rated increases proportionally with the number of test specimens that successfully resist the given level of airblast to the hazard level for which it is rated.
SCOPE
1.1 This test method sets forth procedures for the evaluation of hazards of glazing or glazing systems against airblast loadings. The specifying authority shall provide the airblast loading parameters.
1.2 This test method allows for glazing to be tested and rated with or without framing systems.
1.3 This test method is designed to test and rate all glazing, glazing systems, and glazing retrofit systems including, but not limited to, those fabricated from glass, plastic, glass-clad plastics, laminated glass, glass/plastic glazing materials, and film-backed glass.
1.4 The values stated in SI units are to be regarded as the standard. Values given in parentheses are for information only. For conversion of quantities in various systems of measurements to SI units, see SI 10.
1.5 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. See Section 9 for specific hazards statements.
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Designation: F1642 – 04
Standard Test Method for
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Glazing and Glazing Systems Subject to Airblast Loadings
This standard is issued under the fixed designation F1642; 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.
INTRODUCTION
Historical records show that fragments from glazing that has failed as the result of intentional or
accidental explosions present a serious threat of personal injury. Glazing failure also allows blast
pressure to enter the interior of buildings thus resulting in additional threat of personal injury and
facilitydamage.Theserisksincreaseindirectproportiontotheamountofglazingusedonthebuilding
facade. This test method addresses only glazing and glazing systems. It assumes that the designer has
verified that other structural elements have been adequately designed to resist the anticipated airblast
pressures.
1. Scope E997 Test Method for Structural Performance of Glass in
Exterior Windows, Curtain Walls, and Doors Under the
1.1 This test method sets forth procedures for the evaluation
Influence of Uniform Static Loads by Destructive Methods
of hazards of glazing or glazing systems against airblast
SI 10 American National Standard for Use of the Interna-
loadings. The specifying authority shall provide the airblast
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tional System of Units (SI): The Modern Metric System
loading parameters.
1.2 This test method allows for glazing to be tested and
3. Terminology
rated with or without framing systems.
3.1 Definitions:
1.3 This test method is designed to test and rate all glazing,
3.1.1 ambient temperature—24 6 11°C (75 6 20°F).
glazing systems, and glazing retrofit systems including, but not
3.1.2 blast mat—a steel or concrete pad upon which high
limited to, those fabricated from glass, plastic, glass-clad
explosive may be detonated to reduce the incidence of ejecta.
plastics, laminated glass, glass/plastic glazing materials, and
3.1.3 effective positive phase duration (T)—the duration of
film-backed glass.
anidealizedtriangularpositivephasereflectedairblastpressure
1.4 The values stated in SI units are to be regarded as the
history, having an instantaneous rise to the measured P, with a
standard. Values given in parentheses are for information only.
linear decay to ambient, such that the impulse of the idealized
For conversion of quantities in various systems of measure-
pressure history equals i of the measured positive phase
ments to SI units, see SI 10.
reflected airblast history.
1.5 This standard does not purport to address all of the
3.1.3.1 Discussion—The idealized triangular airblast wave
safety concerns, if any, associated with its use. It is the
is considered to provide a reliable standard measure of the
responsibility of the user of this standard to establish appro-
positive phase airblast intensity.
priate safety and health practices and determine the applica-
3.1.4 glazing—transparent materials used for windows,
bility of regulatory limitations prior to use. See Section 9 for
doors, or other panels.
specific hazards statements.
3.1.5 glazing system—the assembly comprised of the glaz-
2. Referenced Documents ing, its framing system, and anchorage devices.
2 3.1.6 peak positive pressure (P)—the maximum measured
2.1 ASTM Standards:
positive phase airblast pressure, kPa.
3.1.7 positive phase impulse (i)—the integral of the mea-
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This test method is under the jurisdiction ofASTM Committee F12 on Security
sured positive phase reflected airblast pressure history, kPa-ms
Systems and Equipment and is the direct responsibility of Subcommittee F12.10 on
(psi-ms) (more correctly called the specific positive phase
Systems Products and Services.
impulse).
Current edition approved Feb. 1, 2004. Published March 2004. Originally
approved in 1995. Last previous edition approved in 2003 as F1642 – 03. DOI:
3.1.8 reflected airblast pressure—the pressure increase that
10.1520/F1642-04.
a surface, oriented other than parallel to the line from the
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
detonation point to the surface, experiences due to the detona-
contactASTM Customer Service at service@astm.org. ForAnnual Book ofASTM
Standards volume information, refer to the standard’s Document Summary page on tion of a high explosive charge.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F1642 – 04
3.1.8.1 Discussion—The reflected airblast pressure history, proportionally with the number of test specimens that success-
whether reflected
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