ASTM F1642-96
(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
SCOPE
1.1 This test method sets forth procedures for the evaluation of the resistance of glazing or glazing systems against airblast loadings.
1.2 This test method allows for glazings to be tested with or without framing systems.
1.3 This test method is designed to test all glazings and glazing systems, including those fabricated from glass, plastic, glass-clad plastics, laminated glass, glass/plastic glazing materials, and film-backed glass.
1.4 The values stated in inch-pound units are to be regarded as the standard.
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 8 for specific hazards statements.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 1642 – 96
Standard Test Method for
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Glazing and Glazing Systems Subject to Airblast Loadings
This standard is issued under the fixed designation F 1642; 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 (e) 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
facility damage. These risks increase in direct proportion to the amount of glazing used on the building
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 3.1.1 ambient temperature—75 6 20°F.
3.1.2 blast mat—a steel or concrete pad upon which high
1.1 This test method sets forth procedures for the evaluation
explosive may be detonated to reduce the incidence of ejecta.
of the resistance of glazing or glazing systems against airblast
3.1.3 effective positive phase duration (T)—the duration of
loadings.
an idealized triangular positive phase reflected airblast pressure
1.2 This test method allows for glazings to be tested with or
time history, having an instantaneous rise to the measured P,
without framing systems.
with a linear decay to ambient, such that the impulse of the
1.3 This test method is designed to test all glazings and
idealized pressure time history equals i of the measured
glazing systems, including those fabricated from glass, plastic,
positive phase of the reflected airblast time history.
glass-clad plastics, laminated glass, glass/plastic glazing mate-
3.1.3.1 Discussion—The idealized triangular airblast wave
rials, and film-backed glass.
is considered to provide a reliable standard measure of the
1.4 The values stated in inch-pound units are to be regarded
positive phase airblast intensity.
as the standard.
3.1.4 glazing—transparent materials used for windows,
1.5 This standard does not purport to address all of the
doors, or other panels.
safety concerns, if any, associated with its use. It is the
3.1.5 glazing system—the assembly comprised of the glaz-
responsibility of the user of this standard to establish appro-
ing, its framing system, and anchorage devices.
priate safety and health practices and determine the applica-
3.1.6 peak positive pressure (P)—the maximum measured
bility of regulatory limitations prior to use. See Section 8 for
positive phase reflected airblast pressure, pounds per square
specific hazards statements.
inch.
2. Referenced Documents
3.1.7 positive phase impulse (i)—the integral of the mea-
sured positive phase reflected airblast pressure time history,
2.1 ASTM Standards:
pounds per square inch–metres per second (more correctly
E 997 Test Method for Structural Performance of Glass in
called the specific positive phase impulse).
Exterior Windows, Curtain Walls, and Doors Under the
3.1.8 reflected airblast pressure—the pressure increase that
Influence of Uniform Static Loads by Destructive Meth-
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a surface, oriented other than parallel to the line from the
ods
detonation point to the surface, experiences due to the detona-
3. Terminology
tion of a high explosive charge.
3.1.8.1 Discussion—The reflected airblast pressure time
3.1 Definitions:
history, as measured at a point on the surface, consists of two
separate phases. The positive phase is characterized by a nearly
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This test method is under the jurisdiction of ASTM Committee F-12 on
instantaneous rise to a maximum pressure followed by an
Security Systems and Equipmentand is the direct responsibility of Subcommittee
exponential decay to ambient pressure. In the negative phase,
F12.10 on Systems, Products, and Services.
which follows immediately the positive phase, the pressure
Current edition approved March 10, 1996. Published July 1996. Originally
published as F 1642 – 95. Last previous edition F 1642 – 95.
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Annual Book of ASTM Standards, Vol 04.07.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
F 1642
decreases below ambient for a period of time before returning configurations can be used. The effects of using other charge
to ambient. configura
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