ASTM C1487-02(2012)
(Guide)Standard Guide for Remedying Structural Silicone Glazing
Standard Guide for Remedying Structural Silicone Glazing
SIGNIFICANCE AND USE
Guidelines are provided for remedying existing SSG installations. Refer to Guide C1401 for a complete discussion of proper SSG design, installation, and materials.
Due to the unlimited range of materials that may be used in a particular building, and because each design is unique, the information contained in this guide is general in nature.
This guide should not be the only reference consulted when designing remedies for SSG. For example, the local building code and the manufacturers' product literature for the actual materials used, if known, also should be considered. The sealant manufacturer(s) should be involved fully with the remedial design.
This guide is intended to be a resource, but it is not a substitute for experience and judgement in designing remedies for the specialized types of construction discussed. It is intended to be used in conjunction with other resources as an aid in remedying problems with existing SSG.
SCOPE
1.1 This guide provides recommendations for remedying existing structural sealant glazing (hereinafter called SSG) installations in situ. Remedial work may be necessary when a lite of glass is replaced, for routine maintenance, or after distress is discovered. This guide focuses on large-scale remedies.
1.2 Committee C24 is not aware of any comparable standards published by other organizations.
General Information
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation: C1487 − 02 (Reapproved 2012)
Standard Guide for
Remedying Structural Silicone Glazing
This standard is issued under the fixed designation C1487; 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 sealant glazing, such distress may include sealant adhesive
failure, sealant cohesive failure, shifting of a lite, loss of a lite,
1.1 This guide provides recommendations for remedying
or water infiltration (see Guide C1394).
existing structural sealant glazing (hereinafter called SSG)
installations in situ. Remedial work may be necessary when a
3.2.2 qualified person, n—one with a recognized degree or
lite of glass is replaced, for routine maintenance, or after
professional registration and extensive knowledge and experi-
distress is discovered. This guide focuses on large-scale
ence in the field of structural sealant glazing, and who is
remedies.
capable of design, analysis, and evaluation in the subject.
1.2 Committee C24 is not aware of any comparable stan-
4. Significance and Use
dards published by other organizations.
4.1 Guidelines are provided for remedying existing SSG
2. Referenced Documents
installations. Refer to Guide C1401 for a complete discussion
2.1 ASTM Standards:
of proper SSG design, installation, and materials.
C717 Terminology of Building Seals and Sealants
C1392 Guide for Evaluating Failure of Structural Sealant
4.2 Duetotheunlimitedrangeofmaterialsthatmaybeused
Glazing
in a particular building, and because each design is unique, the
C1394 Guide for In-Situ Structural Silicone Glazing Evalu-
information contained in this guide is general in nature.
ation
4.3 This guide should not be the only reference consulted
C1401 Guide for Structural Sealant Glazing
when designing remedies for SSG. For example, the local
E330 Test Method for Structural Performance of Exterior
building code and the manufacturers’ product literature for the
Windows, Doors, Skylights and CurtainWalls by Uniform
actual materials used, if known, also should be considered.The
Static Air Pressure Difference
sealant manufacturer(s) should be involved fully with the
E997 Test Method for Evaluating Glass Breakage Probabil-
remedial design.
ity Under the Influence of Uniform Static Loads by Proof
Load Testing
4.4 This guide is intended to be a resource, but it is not a
E1233 Test Method for Structural Performance of Exterior
substitute for experience and judgement in designing remedies
Windows, Doors, Skylights, and Curtain Walls by Cyclic
for the specialized types of construction discussed. It is
Air Pressure Differential
intended to be used in conjunction with other resources as an
aid in remedying problems with existing SSG.
3. Terminology
3.1 Definitions—Definitions of the terms used in this guide
5. Introduction
are found in Terminology C717.
5.1 There are numerous reasons that a building owner or
3.2 Definitions of Terms Specific to This Standard:
manager, hereinafter referred to as owner, may choose to
3.2.1 distress, n—the individual or collective physical mani-
remedy an SSG system, including routine maintenance or to
festations of a failure as perceivable problems. For structural
correct discovered deficiencies. Regardless of the reason that
such a remedy is undertaken, it is recommended that the
ThisguideisunderthejurisdictionofASTMCommitteeC24onBuildingSeals
remedial design and construction be performed under the
and Sealants and is the direct responsibility of Subcommittee C24.10 on
supervision of a qualified person.
Specifications, Guides and Practices.
CurrenteditionapprovedJune1,2012.PublishedJuly2012.Originallyapproved
5.2 It is essential to begin the remedial process with a
in 2000. Last previous edition approved in 2007 as C1487–02(2007). DOI:
10.1520/C1487-02R12.
comprehensive evaluation, in accordance with the guidelines
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
established in Guide C1394. The underlying cause of failure
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
must be understood fully prior to implementing a remedy;
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. otherwise, the failure may be repeated.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1487 − 02 (2012)
5.3 Based on the outcome of the evaluation, various rem- exposure. It may be necessary to deglaze a lite to access the
edies may be indicated. The potential remedies include, de- actual adhesion surface. It is not recommended to test faces of
pending on the pervasiveness and the nature of the problem, components other than those actually scheduled for permanent
the following: adhesion because the adhesion characteristics can vary with
5.3.1 Isolated repairs (such as the replacement of an indi- exposure and manufacturing processes.
vidual lite of glass) can be performed by a competent glazier
7.3 Because the field test procedure may be cumbersome
trained in the proper installation of SSG. If the original SSG
and expensive to perform, it is recommended to perform
was properly performed, then such minor repairs can be
pretesting to screen possible combinations of products. These
effected by careful duplication of the original procedures.
preliminary tests may be performed in the laboratory or in the
5.3.2 In-situ remedial work is necessary where pervasive
field on convenient surfaces of the components, rather than the
problems exist in an SSG application, such as due to poor
actual adhesion surfaces.
design or workmanship during original construction.
7.4 To verify adhesion with the final product combination,
5.3.3 Complete reglazing may be necessary in extreme
one field test procedure is as follows:
cases or at the end of the useful service life, in accordance with
7.4.1 Perform a minimum of three tests in selected mock-up
the principles for new SSG. For example, if the existing joint
areas. More tests should be performed depending on the
configuration does not allow adequate cleaning to replace a
reasons for repair, or if the existing conditions vary with
structural joint, it may be necessary to reglaze, because
exposure or other variables.
adhesion is critical to the performance of SSG and cleaning is
7.4.2 Apply structural sealant and accessories to actual
critical to adhesion.
adhesion surfaces exactly as they are intended to be installed
5.4 The remainder of this guide particularly addresses the
during full-scale production work.
type of in-situ remedial SSG projects as described in 5.3.2,to
7.4.3 Adjust the installation so that the structural sealant is
correct a pervasive problem without comprehensive reglazing.
exposed, for example, a weatherseal joint may have to be
omitted during testing.
6. Remedial Design
7.4.4 After the cure time recommended by the sealant
6.1 If it is determined that a large-scale remedial program is
manufacturer, install chambers over the test joints and adjacent
necessary, then a remedial design should be developed by a
substrates. Bed chambers in sealant and adhere to the face of
qualified person.
the metal and glass, leaving the top open for filling. See Fig. 1.
7.4.5 Fill the chambers with distilled water, causing the face
6.2 Depending on the cause of the problem(s) with the
of the test joints to be completely immersed in water. Seal the
existing installation, it may not be prudent to rely on the
top edge of t
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