ASTM C716-06(2015)
(Specification)Standard Specification for Installing Lock-Strip Gaskets and Infill Glazing Materials
Standard Specification for Installing Lock-Strip Gaskets and Infill Glazing Materials
ABSTRACT
This specification covers installation procedures for lock-strip gaskets and for infill glazing materials in lock-strip gasket glazing applications used in building walls. The prime performance considerations are weathertightness against air and water infiltration, and structural integrity under wind loads. H-type gasket and reglet-type gasket are types of single-opening gasket systems which should be installed according to the specified requirements. Installation of multiple-opening gasket systems shall be classified as: unsupported vertical ladder assembly; unsupported horizontal ladder assembly; supported vertical ladder assembly; supported horizontal ladder assembly; and grid assembly. Installation of stick system, glass or panel into gasket, and lock-strip shall be in accordance with the requirements specified.
SIGNIFICANCE AND USE
3.1 This specification can be referred to in contract documents as a method and workmanship standard for the installation of lock-strip gasket glazing systems. See also related standards (Specifications C542 and C963, Guide C964, and Terminology C717).
SCOPE
1.1 This specification covers installation procedures for lock-strip gaskets that comply with Specification C542 and for infill glazing materials in lockstrip gasket glazing applications used in building walls which are not more than 15° from a vertical plane. The prime performance considerations are weathertightness against air and water infiltration, and structural integrity under wind loads.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information only.
1.3 The committee with jurisdiction over this standard is not aware of any comparable standards published by other organizations.
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Designation:C716 −06 (Reapproved 2015)
Standard Specification for
Installing Lock-Strip Gaskets and Infill Glazing Materials
This standard is issued under the fixed designation C716; 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 are within specified dimensional tolerances and not out-of-
squareorplane,andcheckallgasketsfortype,dimensions,and
1.1 This specification covers installation procedures for
defects such as misalignment at molded corners and damaged
lock-strip gaskets that comply with Specification C542 and for
lips. Installation shall not proceed until corrections have been
infill glazing materials in lockstrip gasket glazing applications
made.
used in building walls which are not more than 15° from a
vertical plane. The prime performance considerations are 4.2 Environmental Conditions—Maximum efficiency and
weathertightness against air and water infiltration, and struc- sealing capability of gaskets is achieved in a clean, dry, warm
tural integrity under wind loads. environment, with the gasket kept resilient during the entire
installation process. During cold weather the use of temporary
1.2 The values stated in SI units are to be regarded as
enclosures around the units to be glazed or paneled will
standard. The values given in parentheses are provided for
facilitate temperature control and also aid in keeping open
information only.
gasket channels clean and dry.
1.3 The committee with jurisdiction over this standard is not
4.3 Preparation and Conditioning of Gaskets—Lock-strip
aware of any comparable standards published by other orga-
gaskets require conditioning prior to installation in order to
nizations.
restore maximum resiliency and remove deformations after
prolonged storage in a coiled or stressed position. Gaskets shall
2. Referenced Documents
be unpacked from their containers and conditioned for 24 h in
2.1 ASTM Standards:
a temperature not lower than 21.1°C (70°F) by being placed
C542 Specification for Lock-Strip Gaskets
flat or hung on racks to permit recovery of their original
C717 Terminology of Building Seals and Sealants
shapes. Racks shall be free of rough surfaces, projections,
C963 Specification for Packaging, Identification, Shipment,
sharp edges, and other conditions that could damage the
and Storage of Lock-Strip Gaskets
gaskets. When the ambient temperature is 10°C (50°F) or
C964 Guide for Lock-Strip Gasket Glazing
below and a heated space is not available, gaskets shall be
heated by other means to remove deformations and provide a
3. Significance and Use
high degree of flexibility and resiliency. This may be done by
3.1 This specification can be referred to in contract docu-
warming them in hot water or heated containers. Gaskets shall
ments as a method and workmanship standard for the installa-
not be heated by being draped over heated units or placed in
tion of lock-strip gasket glazing systems. See also related
direct contact with a flame or fired heating device. The
standards (Specifications C542 and C963, Guide C964, and
installation of glass, panel, and lock-strip shall be completed
Terminology C717).
while the gasket is still warm and pliable and with the gasket
channels clean and dry.
4. Installation
4.4 Use of Tools—To minimize the possibility of damage,
4.1 Inspection of Components—Before installing gaskets,
sharp or pointed tools or implements such as screwdrivers or
the installer shall check the mounting frames to see that they
putty knives shall not be used on lock-strip gaskets. Suitable
gasket installation tools, such as nonmetallic spatulas and
engineered lock-strip insertion devices, are available from the
This specification is under the jurisdiction of ASTM Committee C24 on
Building Seals and Sealantsand is the direct responsibility of Subcommittee C24.73 gasket manufacturer.
on Compression Seal and Lock Strip Gaskets.
4.5 Use of Lubricants—If necessary a lubricant may be
Current edition approved Dec. 1, 2015. Published December 2015. Originally
applied to the contact surfaces of the gasket to ease the
approved in 1973. Last previous edition approved in 2011 as C716 – 06 (2011).
DOI: 10.1520/C0716-06R15.
installation and help prevent damage to the gasket, glass, or
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
panel. The lubricant shall be nonstaining, nontoxic,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
noncorrosive, chemically stable, compatible with all contact
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. components, easily removable from exposed surfaces by dry
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C716−06 (2015)
wiping or with water, and acceptable to the manufacturer of the
supporting frame, panel, and gasket.
4.6 UseofSupplementaryWetSealants—The use of supple-
mentary wet sealants in conjunction with lock-strip gasket
installations is only required under certain conditions. Such a
condition would occur when the outer lip of the gasket extends
over a butt joint in the supporting frame. The void formed
between the gasket and frame shall be sealed at the time of
installation with a wet sealant. However, the sealant may be
omitted if the system is designed to drain any water that enters
to the exterior, and the omission of a wet sealant is agreeable
to the purchaser and seller.Another condition would be at field
butt joints in gaskets. Such joints require the use of a sealant
FIG. 1 Gasket Systems
installed in, rather than on top of, the joint at the time of the
gasket installation. The wet sealant used, as well as the sealant
manufacturer’s requirements for cleaning and priming the
center line of the vertical gasket muntin. Install the jamb
surfaces to be sealed, shall be compatible with the components
section first, then work along the head and sill to the first
in contact with it and acceptable to the manufacturers of the
muntin.Align each gasket muntin with the center lines marked
components. The use of wet sealants to remedy a defective or
on the head and sill. Install the glass or panel. The installation
damaged gasket or improperly fabricated supporting frame
of setting blocks and edge spacers can be performed as
shall not be permitted, unless agreeable to the purchaser and
described in 4.10.Then insert the lock-strip at the sill and head,
seller.
running to within a few inches of the first gasket muntin.
4.7 Installation of Single-Opening Gasket Systems:
Continue the procedure by installing the next glass or panel.
4.7.1 H-Type Gasket—Install the upper gasket corners first,
Insert the lock-strip into the muntin first and continue with the
and then install the lower gasket corners onto the supporting
insertion of the lock-strip at the head and sill members. Repeat
frame. To avoid slippage, engage both horizontal and vertical
the procedure until all glass or panels are installed.
members for about 304.8 mm (1 ft) in both directions from the
4.8.3 Supported Vertical Ladder Assembly—Align and se-
corners, and work the gasket until the web is snug against head
cure the gasket horizontal muntins to the corresponding sup-
and jambs and the corners are square.Then work the remainder
porting structural members.The gasket muntins are held in line
of the gasket onto the supporting frame by starting from each
by the structural supporting muntin
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C716 − 06 (Reapproved 2011) C716 − 06 (Reapproved 2015)
Standard Specification for
Installing Lock-Strip Gaskets and Infill Glazing Materials
This standard is issued under the fixed designation C716; 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
1.1 This specification covers installation procedures for lock-strip gaskets that comply with Specification C542 and for infill
glazing materials in lockstrip gasket glazing applications used in building walls which are not more than 15° from a vertical plane.
The prime performance considerations are weathertightness against air and water infiltration, and structural integrity under wind
loads.
1.2 The values stated in inch-poundSI units are to be regarded as the standard. The SI unitsvalues given in parentheses are
provided for information only.
1.3 The committee with jurisdiction over this standard is not aware of any comparable standards published by other
organizations.
2. Referenced Documents
2.1 ASTM Standards:
C542 Specification for Lock-Strip Gaskets
C717 Terminology of Building Seals and Sealants
C963 Specification for Packaging, Identification, Shipment, and Storage of Lock-Strip Gaskets
C964 Guide for Lock-Strip Gasket Glazing
3. Significance and Use
3.1 This specification can be referred to in contract documents as a method and workmanship standard for the installation of
lock-strip gasket glazing systems. See also related standards (Specifications C542 and C963, Guide C964, and Terminology C717).
4. Installation
4.1 Inspection of Components—Before installing gaskets, the installer shall check the mounting frames to see that they are
within specified dimensional tolerances and not out-of-square or plane, and check all gaskets for type, dimensions, and defects such
as misalignment at molded corners and damaged lips. Installation shall not proceed until corrections have been made.
4.2 Environmental Conditions—Maximum efficiency and sealing capability of gaskets is achieved in a clean, dry, warm
environment, with the gasket kept resilient during the entire installation process. During cold weather the use of temporary
enclosures around the units to be glazed or paneled will facilitate temperature control and also aid in keeping open gasket channels
clean and dry.
4.3 Preparation and Conditioning of Gaskets—Lock-strip gaskets require conditioning prior to installation in order to restore
maximum resiliency and remove deformations after prolonged storage in a coiled or stressed position. Gaskets shall be unpacked
from their containers and conditioned for 24 h in a temperature not lower than 21.1°C (70°F) by being placed flat or hung on racks
to permit recovery of their original shapes. Racks shall be free of rough surfaces, projections, sharp edges, and other conditions
that could damage the gaskets. When the ambient temperature is 10°C (50°F) or below and a heated space is not available, gaskets
shall be heated by other means to remove deformations and provide a high degree of flexibility and resiliency. This may be done
by warming them in hot water or heated containers. Gaskets shall not be heated by being draped over heated units or placed in
This specification is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealantsand is the direct responsibility of Subcommittee C24.73 on
Compression Seal and Lock Strip Gaskets.
Current edition approved June 1, 2011Dec. 1, 2015. Published August 2011December 2015. Originally approved in 1973. Last previous edition approved in 20062011
as C716 – 06.C716 – 06 (2011). DOI: 10.1520/C0716-06R11.10.1520/C0716-06R15.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C716 − 06 (2015)
direct contact with a flame or fired heating device. The installation of glass, panel, and lock-strip shall be completed while the
gasket is still warm and pliable and with the gasket channels clean and dry.
4.4 Use of Tools—To minimize the possibility of damage, sharp or pointed tools or implements such as screwdrivers or putty
knives shall not be used on lock-strip gaskets. Suitable gasket installation tools, such as nonmetallic spatulas and engineered
lock-strip insertion devices, are available from the gasket manufacturer.
4.5 Use of Lubricants—If necessary a lubricant may be applied to the contact surfaces of the gasket to ease the installation and
help prevent damage to the gasket, glass, or panel. The lubricant shall be nonstaining, nontoxic, noncorrosive, chemically stable,
compatible with all contact components, easily removable from exposed surfaces by dry wiping or with water, and acceptable to
the manufacturer of the supporting frame, panel, and gasket.
4.6 Use of Supplementary Wet Sealants—The use of supplementary wet sealants in conjunction with lock-strip gasket
installations is only required under certain conditions. Such a condition would occur when the outer lip of the gasket extends over
a butt joint in the supporting frame. The void formed between the gasket and frame shall be sealed at the time of installation with
a wet sealant. However, the sealant may be omitted if the system is designed to drain any water that enters to the exterior, and the
omission of a wet sealant is agreeable to the purchaser and seller. Another condition would be at field butt joints in gaskets. Such
joints require the use of a sealant installed in, rather than on top of, the joint at the time of the gasket installation. The wet sealant
used, as well as the sealant manufacturer’s requirements for cleaning and priming the surfaces to be sealed, shall be compatible
with the components in contact with it and acceptable to the manufacturers of the components. The use of wet sealants to remedy
a defective or damaged gasket or improperly fabricated supporting frame shall not be permitted, unless agreeable to the purchaser
and seller.
4.7 Installation of Single-Opening Gasket Systems:
4.7.1 H-Type Gasket—Install the upper gasket corners first, and then install the lower gasket corners onto the supporting frame.
To avoid slippage, engage both horizontal and vertical members for about 304.8 mm (1 ft) in both directions from the corners, and
work the gasket until the web is snug against head and jambs and the corners are square. Then work the remainder of the gasket
onto the supporting frame by starting from each corner and working towards the center of each side, making sure the gasket web
is firmly seated against the frame and that the sealing lips are not curled under, particularly at the corners. Pull each corner of outer
flange about 6.4 mm ( ⁄4 in.) away from the supporting frame with thumb or nonmetallic spatula and then release to ensure
uncurling any corner lips hidden from view.
4.7.2 Reglet-Type Gasket—Insert the upper gasket corners first, and then install the lower gasket corners into the groove or reglet
of the supporting frame, seating them firmly with a resiliently faced hammer and a wooden or metal block having smooth, rounded
edges and corners. Then, on each side, insert the gasket into the groove at the center of each side working from t
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