Standard Test Methods for Deglazing Force of Fenestration Products

SIGNIFICANCE AND USE
Under normal usage, deglazing loads are generally applied parallel to the plane of the glazing material and eccentric to the sash element when it is opened, closed, or lifted out of the frame. When operating hardware is present, torsional forces may be increased. Opening and closing forces are normally applied from the interior side only. Sliding glass door panels are activated from both sides.
The ability of fenestration products to resist deglazing forces may vary with a number of factors. These factors should be considered when selecting test specimens or when interpreting test results. Bedding compounds in newly assembled sashes may not reach full strength until they have been allowed to cure for several days or weeks. Some sash materials are subject to shrinkage at low temperatures and increased elasticity at high temperatures. Therefore, a sash containing these materials may exhibit a range of deglazing resistance due to varying temperature conditions. Normal manufacturing tolerances and clearances in sash members and glazing materials may also affect deglazing resistance. Further, although fenestration products are designed to operate within certain force limits, improper installation, wear, and abuse may increase the forces necessary for sash operation.
When determining which members of a given sash shall be tested for deglazing resistance, consideration must be given to the manner in which the sash may be operated when normally installed. Handles and lift devices are usually located on the sash for the convenience of the operator and therefore dictate the normal direction of operation.
Test Method A presents a technique for actual measurement of the deglazing forces of an individual sash member.
Test Method B presents a technique for measuring the deglazing force of two opposite members. This test method is intended for quality control measurements.
SCOPE
1.1 These test methods measure the resistance of elements of fenestration products such as operating (or removable) window sashes, storm sashes, and sliding glass door panels (hereafter referred to as sash members) to forces tending to deglaze the construction.  
1.2 These test methods utilize concentrated loads applied to the interior side of a sash member in a manner simulating normal opening and closing forces. Removable sashes are loaded to simulate handling for removal and cleaning.
1.3 The values stated in inch-pound units are to be regarded as the standard. The metric (SI) equivalents of inch-pound units may be approximate.  
1.4 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.
Contact ASTM International (www.astm.org) for the latest information.
Designation:E987–88(Reapproved 2001)
Standard Test Methods for
Deglazing Force of Fenestration Products
This standard is issued under the fixed designation E987; 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.
1. Scope 4. Significance and Use
1.1 These test methods measure the resistance of elements 4.1 Under normal usage, deglazing loads are generally
of fenestration products such as operating (or removable) applied parallel to the plane of the glazing material and
window sashes, storm sashes, and sliding glass door panels eccentrictothesashelementwhenitisopened,closed,orlifted
(hereafter referred to as sash members) to forces tending to out of the frame.When operating hardware is present, torsional
deglaze the construction. forces may be increased. Opening and closing forces are
1.2 These test methods utilize concentrated loads applied to normally applied from the interior side only. Sliding glass door
the interior side of a sash member in a manner simulating panels are activated from both sides.
normal opening and closing forces. Removable sashes are 4.2 The ability of fenestration products to resist deglazing
loaded to simulate handling for removal and cleaning. forces may vary with a number of factors.These factors should
1.3 The values stated in inch-pound units are to be regarded be considered when selecting test specimens or when interpret-
as the standard. The metric (SI) equivalents of inch-pound ing test results. Bedding compounds in newly assembled
units may be approximate. sashes may not reach full strength until they have been allowed
1.4 This standard does not purport to address all of the to cure for several days or weeks. Some sash materials are
safety concerns, if any, associated with its use. It is the subject to shrinkage at low temperatures and increased elastic-
responsibility of the user of this standard to establish appro- ity at high temperatures. Therefore, a sash containing these
priate safety and health practices and determine the applica- materials may exhibit a range of deglazing resistance due to
bility of regulatory limitations prior to use. varying temperature conditions. Normal manufacturing toler-
ances and clearances in sash members and glazing materials
2. Referenced Documents
may also affect deglazing resistance. Further, although fenes-
2.1 ASTM Standards:
tration products are designed to operate within certain force
E631 Terminology of Building Constructions
limits, improper installation, wear, and abuse may increase the
forces necessary for sash operation.
3. Terminology
4.3 When determining which members of a given sash shall
3.1 Definitions—For definitions of terms used in these test
be tested for deglazing resistance, consideration must be given
methods, refer to Terminology E631.
to the manner in which the sash may be operated when
3.2 Descriptions of Terms Specific to This Standard:
normally installed. Handles and lift devices are usually located
3.2.1 deglazing—the movement of a sash member from its
on the sash for the convenience of the operator and therefore
original position in relation to the glazing material. Deglazing
dictate the normal direction of operation.
is expressed as a percentage of the original (before testing)
4.4 Test Method A presents a technique for actual measure-
glazing “bite.”
ment of the deglazing forces of an individual sash member.
3.2.2 deglazing force—the force required to obtain the
4.5 Test Method B presents a technique for measuring the
deglazing measured.
deglazing force of two opposite members. This test method is
3.2.3 bite—the distance from the edge of the glazing mate-
intended for quality control measurements.
rial to the sight line.
5. Apparatus
5.1 Hydraulic or Pneumatic Ram, or an equivalent capable
These test methods are under the jurisdiction of ASTM Committee E06 on
of producing at least a 100-lbf (445-N) force when connected
Performance of Buildings and are the direct responsibility of Subcommittee E06.51
on Component Performance of Windows, Curtain Walls, and Doors.
to a hydraulic pump or compressed air supply, or an equivalent
Current edition approved Feb. 26, 1988. Published July 1988. Originally
of suitable capacity. The ram piston extension can be fitted to
published as E987 – 64. Last previous edition E987 – 84. DOI: 10.1520/E0987-
allow the addition of extensions to accommodate the width or
88R01.
length of the specimen to be tested.
Annual Book of ASTM Standards, Vol 04.11.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
E987–88 (2001)
5.1.1 Sliding Contact Shoe, to be fitted on either end of the 6. Test Specimen
ram, as shown in Fig. 1.
6.1 Submit the test specimen glazed in accordance with the
5.1.1.1 For Test Method A, only one shoe is required, since
manufacturer’s standard practices for the window sash or the
the opposing force will be dissipated against a stationary
door panel to be tested. The test specimen shall be of the
support.
maximum width and maximum height for which the test data
5.1.1.2 ForTestMethodB,twocontactshoesarerequiredto
is to be determined.
generate the opposing forces against opposite sash members.
6.2 The sash or panel members to be included in this test are
5.1.2 Force Gage, capable of measuring force to an accu-
those having integral pull provisions, and those having no
racy of 61.0 lbf (64.5 N).
integral pull provisions, but fitted with handles, latches, or
5.1.2.1 The apparatus, including the gage system, shall be
other means that might be used to operate the window or door.
calibrated and a calibration curve prepared every 6 months
Removablewindowsashes,becauseoftheirinherentcapability
correlating gage readings to pounds-force generated.
of being lifted by any sash surround, shall be tested on all four
5.2 Extensometers, capable of being read to an accuracy of
sash surround members.
0.01 in. (0.25 mm), required to measure the deflection of the
6.2.1 Test sliding glass door panels from both the interior
members under test. One extensometer is required for Test
and exterior side on the stile containing the locking mecha-
MethodAand two extensometers are required for Test Method
nism, necessitating the submission of at least two panels for
B.
each door tested.
6.3 Acclimate the test specimen to the ambient conditions
und
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