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SECTION 08 80 00 - GLAZING
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section includes:
1. Glass for doors and interior borrowed lites, not listed in other Specification Sections.
2. Glazing sealants and accessories.
B. Other Sections:
1. For glazing in clad wood patio doors, refer to Specification Section 08 14 34,
2. For glazing in composite material windows, refer to Specification Section 08 54 10.
1.3 DEFINITIONS
A. Glass Manufacturers: Firms that produce primary glass, fabricated glass, or both, as defined in
referenced glazing publications.
B. Glass Thicknesses: Indicated by thickness designations in millimeters according to
ASTM C 1036.
C. IBC: International Building Code.
D. Interspace: Space between lites of an insulating-glass unit.
1.4 COORDINATION
A. Coordinate glazing channel dimensions to provide necessary bite on glass, minimum edge and
face clearances, and adequate sealant thicknesses, with reasonable tolerances.
1.5 PRE-INSTALLATION MEETINGS
A. Pre-installation Conference: Conduct conference at Project site.
1. Review and finalize construction schedule and verify availability of materials, Installer's
personnel, equipment, and facilities needed to make progress and avoid delays.
2. Review temporary protection requirements for glazing during and after installation.
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1.6 ACTION SUBMITTALS
A. Product Data: For each type of product.
B. Glass Samples: For each type of the following products; 12 inches square.
1. Tinted glass.
2. Coated glass.
3. Laminated glass.
4. Insulating glass.
C. Glazing Accessory Samples: For sealants, in 12-inch lengths. Install sealant Samples between
two strips of material representative in color of the adjoining framing system.
D. Glazing Schedule: List glass types and thicknesses for each size opening and location. Use
same designations indicated on Drawings.
E. Delegated-Design Submittal: For glass indicated to comply with performance requirements and
design criteria, including analysis data signed and sealed by the qualified professional engineer
responsible for their preparation.
1.7 INFORMATIONAL SUBMITTALS
A. Qualification Data: For manufacturers of insulating-glass units with sputter-coated, low-E
coatings glass testing agency and sealant testing agency.
B. Product Certificates: Signed by manufacturer of glass and glazing products certifying that
products furnished comply with requirements
C. Product Test Reports: For tinted glass, coated glass, insulating glass and glazing sealants, for
tests performed by a qualified testing agency.
1. For glazing sealants, provide test reports based on testing current sealant formulations
within previous 36-month period.
D. Preconstruction adhesion and compatibility test report.
E. Sample Warranties: For special warranties.
1.8 QUALITY ASSURANCE
A. Manufacturer Qualifications for Insulating-Glass Units with Sputter-Coated, Low-E Coatings:
Refer to Specification Section 01 40 00 “Quality Requirements.”
B. Installer Qualifications: Refer to Specification Section 01 40 00 “Quality Requirements.”
C. Glass Testing Agency Qualifications: A qualified independent testing agency accredited
according to the NFRC CAP 1 Certification Agency Program.
D. Sealant Testing Agency Qualifications: An independent testing agency qualified according to
ASTM C 1021 to conduct the testing indicated.
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E. Mockups: Build mockups, if requested in writing by Architect, to demonstrate aesthetic effects
and to set quality standards for materials and execution.
1. Install glazing in mockups specified to match glazing systems required for Project,
including glazing methods.
2. Subject to compliance with requirements, approved mockups may become part of the
completed Work if undisturbed at time of Substantial Completion.
1.9 PRECONSTRUCTION TESTING
A. Preconstruction Adhesion and Compatibility Testing: Test each glass product, tape sealant,
gasket, glazing accessory, and glass-framing member for adhesion to and compatibility with
elastomeric glazing sealants.
1. Testing is not required if data are submitted based on previous testing of current sealant
products and glazing materials matching those submitted.
2. Use ASTM C 1087 to determine whether priming and other specific joint-preparation
techniques are required to obtain rapid, optimum adhesion of glazing sealants to glass,
tape sealants, gaskets, and glazing channel substrates.
3. Test no fewer than eight Samples of each type of material, including joint substrates,
shims, sealant backings, secondary seals, and miscellaneous materials.
4. Schedule enough time for testing and analyzing results to prevent delaying the Work.
5. For materials failing tests, submit sealant manufacturer's written instructions for
corrective measures including the use of specially formulated primers.
1.10 DELIVERY, STORAGE, AND HANDLING
A. Protect glazing materials according to manufacturer's written instructions. Prevent damage to
glass and glazing materials from condensation, temperature changes, direct exposure to sun, or
other causes.
B. Comply with insulating-glass manufacturer's written instructions for venting and sealing units to
avoid hermetic seal ruptures due to altitude change.
1.11 FIELD CONDITIONS
A. Environmental Limitations: Do not proceed with glazing when ambient and substrate
temperature conditions are outside limits permitted by glazing material manufacturers and when
glazing channel substrates are wet from rain, frost, condensation, or other causes.
1. Do not install glazing sealants when ambient and substrate temperature conditions are
outside limits permitted by sealant manufacturer or are below 40 deg F.
1.12 WARRANTY
A. Manufacturer's Special Warranty for Coated-Glass Products: Manufacturer agrees to replace
coated-glass units that deteriorate within specified warranty period. Deterioration of coated
glass is defined as defects developed from normal use that are not attributed to glass breakage
or to maintaining and cleaning coated glass contrary to manufacturer's written instructions.
Defects include peeling, cracking, and other indications of deterioration in coating.
1. Warranty Period: 10 years from date of Substantial Completion.
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B. Manufacturer's Special Warranty for Laminated Glass: Manufacturer agrees to replace
laminated-glass units that deteriorate within specified warranty period. Deterioration of
laminated glass is defined as defects developed from normal use that are not attributed to glass
breakage or to maintaining and cleaning laminated glass contrary to manufacturer's written
instructions. Defects include edge separation, delamination materially obstructing vision through
glass, and blemishes exceeding those allowed by referenced laminated-glass standard.
1. Warranty Period: Five years from date of Substantial Completion.
C. Manufacturer's Special Warranty for Insulating Glass: Manufacturer agrees to replace
insulating-glass units that deteriorate within specified warranty period. Deterioration of insulating
glass is defined as failure of hermetic seal under normal use that is not attributed to glass
breakage or to maintaining and cleaning insulating glass contrary to manufacturer's written
instructions. Evidence of failure is the obstruction of vision by dust, moisture, or film on interior
surfaces of glass.
1. Warranty Period: 10 years from date of Substantial Completion.
PART 2 - PRODUCTS
2.1 MANUFACTURERS
A. Source Limitations for Glass: Obtain from single source from single manufacturer for each glass
type.
1. Obtain tinted glass from single source from single manufacturer.
B. Source Limitations for Glazing Accessories: Obtain from single source from single manufacturer
for each product and installation method.
2.2 PERFORMANCE REQUIREMENTS
A. General: Installed glazing systems shall withstand normal thermal movement and wind and
impact loads (where applicable) without failure, including loss or glass breakage attributable to
the following: defective manufacture, fabrication, or installation; failure of sealants or gaskets to
remain watertight and airtight; deterioration of glazing materials; or other defects in construction.
B. Delegated Design: Engage a qualified professional engineer, as defined in Section 01 40 00
"Quality Requirements," to design glazing.
C. Structural Performance: Glazing shall withstand the following design loads within limits and
under conditions indicated determined according to the IBC and ASTM E 1300.
1. Design Wind Pressures: As indicated on Drawings.
2. Design Wind Pressures: Determine design wind pressures applicable to Project
according to ASCE/SEI 7, based on heights above grade indicated on Drawings.
a. Wind Design Data: As indicated on Drawings.
b. Basic Wind Speed: 130 mph.
c. Importance Factor: Refer to Structural Drawings.
d. Exposure Category: Refer to Structural Drawings.
3. Design Snow Loads: As indicated on Drawings.
4. Maximum Lateral Deflection: For glass supported on all four edges, limit center-of-glass
deflection at design wind pressure to not more than 1/50 times the short-side length or 1
inch, whichever is less.
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5. Differential Shading: Design glass to resist thermal stresses induced by differential
shading within individual glass lites.
D. Windborne-Debris-Impact Resistance: Exterior glazing shall comply with basic-protection testing
requirements in ASTM E 1996 when tested according to ASTM E 1886. Test specimens shall be
no smaller in width and length than glazing indicated for use on Project and shall be installed in
same manner as glazing indicated for use on Project.
1. Large-Missile Test: For glazing located within 30 feet of grade.
2. Small-Missile Test: For glazing located more than 30 feet above grade.
E. Safety Glazing: Where safety glazing is indicated, provide glazing that complies with
16 CFR 1201, Category II.
F. Thermal and Optical Performance Properties: Provide glass with performance properties
specified, as indicated in manufacturer's published test data, based on procedures indicated
below:
1. For monolithic-glass lites, properties are based on units with lites of thickness indicated.
2. For laminated-glass lites, properties are based on products of construction indicated.
3. For insulating-glass units, properties are based on units of thickness indicated for overall
unit and for each lite.
4. U-Factors: Center-of-glazing values, according to NFRC 100 and based on LBL's
WINDOW 5.2 computer program, expressed as Btu/sq. ft. x h x deg F.
5. Solar Heat-Gain Coefficient and Visible Transmittance: Center-of-glazing values,
according to NFRC 200 and based on LBL's WINDOW 5.2 computer program.
6. Visible Reflectance: Center-of-glazing values, according to NFRC 300.
2.3 GLASS PRODUCTS, GENERAL
A. Glazing Publications: Comply with published recommendations of glass product manufacturers
and organizations below unless more stringent requirements are indicated. See these
publications for glazing terms not otherwise defined in this Section or in referenced standards.
1. GANA Publications: "Laminated Glazing Reference Manual" and "Glazing Manual."
2. IGMA Publication for Insulating Glass: SIGMA TM-3000, "North American Glazing
Guidelines for Sealed Insulating Glass Units for Commercial and Residential Use."
B. Safety Glazing Labeling: Where safety glazing is indicated, permanently mark glazing with
certification label of the SGCC. Label shall indicate manufacturer's name, type of glass,
thickness, and safety glazing standard with which glass complies.
C. Fire-Protection-Rated Glazing Labeling: Permanently mark fire-protection-rated glazing with
certification label of a testing agency acceptable to authorities having jurisdiction. Label shall
indicate manufacturer's name, test standard, whether glazing is for use in fire doors or other
openings, whether glazing passes hose-stream test, whether or not glazing has a temperature
rise rating of 450 deg F, and the fire-resistance rating in minutes.
D. Insulating-Glass Certification Program: Permanently marked either on spacers or on at least
one component lite of units with appropriate certification label of IGCC.
E. Thickness: Where glass thickness is indicated, it is a minimum. Provide glass that complies with
performance requirements and is not less than the thickness indicated.
1. Minimum Glass Thickness for Exterior Lites: 6 mm.
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2. Thickness of Tinted Glass: Provide same thickness for each tint color indicated
throughout Project.
F. Strength: Where annealed float glass is indicated, provide annealed float glass, heat-
strengthened float glass, or fully tempered float glass as needed to comply with "Performance
Requirements" Article. Where heat-strengthened, float glass is indicated, provide heat-
strengthened float glass or fully tempered float glass as needed to comply with "Performance
Requirements" Article. Where fully tempered float glass is indicated, provide fully tempered float
glass.
2.4 MONOLITHIC GLASS TYPES
A. Clear Annealed Float Glass: ASTM C 1036, Type I, Class 1 (clear), Quality-Q3.
B. Tinted Annealed Float Glass: ASTM C 1036, Type I, Class 2 (tinted), Quality-Q3.
C. Fully Tempered Float Glass: ASTM C 1048, Kind FT (fully tempered), Condition A (uncoated)
unless otherwise indicated, Type I, Class 1 (clear) or Class 2 (tinted) as indicated, Quality-Q3.
1. Fabrication Process: By horizontal (roller-hearth) process with roll-wave distortion parallel
to bottom edge of glass as installed unless otherwise indicated.
D. Heat-Strengthened Float Glass: ASTM C 1048, Kind HS (heat strengthened), Type I,
Condition A (uncoated) unless otherwise indicated, Type I, Class 1 (clear) or Class 2 (tinted) as
indicated, Quality-Q3.
1. Fabrication Process: By horizontal (roller-hearth) process with roll-wave distortion parallel
to bottom edge of glass as installed unless otherwise indicated.
2.5 INSULATING GLASS TYPES
A. Glass Type: Solar Control Low-e Coated, Clear Insulating Glass Unit: Doors with glass panels.
Basis of Design: Solarban 60 (2) Clear + Clear.
1. Outdoor Lite: Clear glass sputter coated on surface #2, fully tempered float glass.
2. Inter-space: ½ “air.
3. Indoor Lite: Clear fully tempered float glass.
4. Low-E Coating: Solarban 60 Solar Control on second surface.
5. Visible Light Transmittance: 70 percent minimum.
6. Winter U-Factor: 0.29 maximum.
7. Solar Heat Gain Coefficient: 0.39 maximum.
8. Provide safety glazing labeling.
9. Approved manufacturers: PPG Certified Fabricator required.
10. Outdoor Appearance: Clear
11. Insulating Unit Construction: ¼” (6 mm) glass + ½” (13 mm) air space + ¼” (6 mm)
glass.
B. Glass Type: Solar Control Low-e Coated, Clear Insulating Glass Unit: Storefront glass panel
units. Basis of Design: Solarban 60 (2) Clear + Clear.
1. Outdoor Lite: Clear glass sputter coated on surface #2, heat strengthened float glass.
2. Inter-space Content: ½” air.
3. Indoor Lite: Heat strengthened float glass.
4. Low-E Coating: Solarban 60 Solar Control sputtered on second surface.
5. Approved manufacturers: PPG Certified Fabricator required.
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6. Outdoor Appearance: Clear.
7. Insulating Unit Construction: ¼” (6 mm) glass + ½” (13 mm) air space + ¼” (6 mm)
glass.
8. Provide safety glazing labeling.
2.6 FIRE-PROTECTION-RATED GLAZING TYPES
A. Glass Type: 45-minute and 90-minute fire-rated glazing: laminated ceramic glazing.
2.7 WIRE GLASS TYPES
A. Polished Wire Glass: ASTM C 1036, Type II, Class 1 (clear), Form 1, Quality – Q6, complying
with ANSI Z97.1, Class C.
1. Products: Subject to compliance with requirements, available products that may be
incorporated into the Work include, but are not limited to, the following:
a. PPG.
b. Pilkington.
2. Mesh: M1 (diamond).
2.8 GLAZING SEALANTS
A. General:
1. Compatibility: Compatible with one another and with other materials they contact,
including glass products, seals of insulating-glass units, and glazing channel substrates,
under conditions of service and application, as demonstrated by sealant manufacturer
based on testing and field experience.
2. Suitability: Comply with sealant and glass manufacturers' written instructions for selecting
glazing sealants suitable for applications indicated and for conditions existing at time of
installation.
3. Sealant shall have a VOC content of 250 g/L or less.
4. Sealant shall comply with the testing and product requirements of the California
Department of Public Health's "Standard Method for the Testing and Evaluation of Volatile
Organic Chemical Emissions from Indoor Sources Using Environmental Chambers."
5. Colors of Exposed Glazing Sealants: As selected by Architect from manufacturer's full
range.
B. Glazing Sealant: Neutral-curing silicone glazing sealant complying with ASTM C 920, Type S,
Grade NS, Class 25, Use NT.
1. Products: Subject to compliance with requirements, provide one of the following:
a. Dow Corning Corporation; 799.
b. GE Advanced Materials - Silicones; UltraGlaze SSG4000.
c. Polymeric Systems, Inc.; PSI-631.
d. Schnee-Morehead, Inc., an ITW company; SM5731 Poly-Glaze Plus.
e. Tremco Incorporated; Proglaze SSG.
2.9 GLAZING TAPES
A. Back-Bedding Mastic Glazing Tapes: Preformed, butyl-based, 100 percent solids elastomeric
tape; non-staining and non-migrating in contact with non-porous surfaces; with or without
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spacer rod as recommended in writing by tape and glass manufacturers for application
indicated; and complying with ASTM C 1281 and AAMA 800 for products indicated below:
1. AAMA 804.3 tape, where indicated.
2. AAMA 806.3 tape, for glazing applications in which tape is subject to continuous
pressure.
3. AAMA 807.3 tape, for glazing applications in which tape is not subject to continuous
pressure.
B. Expanded Cellular Glazing Tapes: Closed-cell, PVC foam tapes; factory coated with adhesive
on both surfaces; and complying with AAMA 800 for the following types:
1. AAMA 810.1, Type 1, for glazing applications in which tape acts as the primary sealant.
2. AAMA 810.1, Type 2, for glazing applications in which tape is used in combination with a
full bead of liquid sealant.
2.10 GLAZING GASKETS
A. Dense Compression Gaskets: Molded or extruded gaskets of profile and hardness required to
maintain watertight seal, made from one of the following:
1. Neoprene complying with ASTM C 864.
2. EPDM complying with ASTM C 864.
3. Silicone complying with ASTM C 1115.
4. Thermoplastic polyolefin rubber complying with ASTM C 1115.
B. Soft Compression Gaskets: Extruded or molded, closed-cell, integral-skinned neoprene,
EPDM, silicone or thermoplastic polyolefin rubber gaskets complying with ASTM C 509, Type II,
black; of profile and hardness required to maintain watertight seal.
1. Application: Use where soft compression gaskets will be compressed by inserting dense
compression gaskets on opposite side of glazing or pressure applied by means of
pressure-glazing stops on opposite side of glazing.
C. Lock-Strip Gaskets: Neoprene extrusions in size and shape indicated, fabricated into frames
with molded corner units and zipper lock-strips, complying with ASTM C 542, black.
2.11 MISCELLANEOUS GLAZING MATERIALS
A. General: Provide products of material, size, and shape complying with referenced glazing
standard, with requirements of manufacturers of glass and other glazing materials for
application indicated, and with a proven record of compatibility with surfaces contacted in
installation.
B. Cleaners, Primers, and Sealers: Types recommended by sealant or gasket manufacturer.
C. Setting Blocks: Elastomeric material with a Shore, Type A durometer hardness of 85, plus or
minus 5.
D. Spacers: Elastomeric blocks or continuous extrusions of hardness required by glass
manufacturer to maintain glass lites in place for installation indicated.
E. Edge Blocks: Elastomeric material of hardness needed to limit glass lateral movement (side
walking).
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F. Cylindrical Glazing Sealant Backing: ASTM C 1330, Type O (open-cell material), of size and
density to control glazing sealant depth and otherwise produce optimum glazing sealant
performance.
G. Perimeter Insulation for Fire-Resistive Glazing: Product that is approved by testing agency that
listed and labeled fire-resistant glazing product with which it is used for application and fire-
protection rating indicated.
2.12 FABRICATION OF GLAZING UNITS
A. Fabricate glazing units in sizes required to fit openings indicated for Project, with edge and face
clearances, edge and surface conditions, and bite complying with written instructions of product
manufacturer and referenced glazing publications, to comply with system performance
requirements.
1. Allow for thermal movements from ambient and surface temperature changes acting on
glass framing members and glazing components.
a. Temperature Change: 120 deg F, ambient; 180 deg F, material surfaces.
B. Clean-cut or flat-grind vertical edges of butt-glazed monolithic lites to produce square edges
with slight chamfers at junctions of edges and faces.
C. Grind smooth and polish exposed glass edges and corners.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine framing, glazing channels, and stops, with Installer present, for compliance with the
following:
1. Manufacturing and installation tolerances, including those for size, squareness, and
offsets at corners.
2. Presence and functioning of weep systems.
3. Minimum required face and edge clearances.
4. Effective sealing between joints of glass-framing members.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 PREPARATION
A. Clean glazing channels and other framing members receiving glass immediately before glazing.
Remove coatings not firmly bonded to substrates.
B. Examine glazing units to locate exterior and interior surfaces. Label or mark units as needed so
that exterior and interior surfaces are readily identifiable. Do not use materials that leave visible
marks in the completed Work.
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3.3 GLAZING, GENERAL
A. Comply with combined written instructions of manufacturers of glass, sealants, gaskets, and
other glazing materials, unless more stringent requirements are indicated, including those in
referenced glazing publications.
B. Protect glass edges from damage during handling and installation. Remove damaged glass
from Project site and legally dispose of off Project site. Damaged glass includes glass with edge
damage or other imperfections that, when installed, could weaken glass, impair performance, or
impair appearance.
C. Apply primers to joint surfaces where required for adhesion of sealants, as determined by
preconstruction testing.
D. Install setting blocks in sill rabbets, sized and located to comply with referenced glazing
publications, unless otherwise required by glass manufacturer. Set blocks in thin course of
compatible sealant suitable for heel bead.
E. Do not exceed edge pressures stipulated by glass manufacturers for installing glass lites.
F. Provide spacers for glass lites where length plus width is larger than 50 inches.
1. Locate spacers directly opposite each other on both inside and outside faces of glass.
Install correct size and spacing to preserve required face clearances, unless gaskets and
glazing tapes are used that have demonstrated ability to maintain required face
clearances and to comply with system performance requirements.
2. Provide 1/8-inch minimum bite of spacers on glass and use thickness equal to sealant
width. With glazing tape, use thickness slightly less than final compressed thickness of
tape.
G. Provide edge blocking where indicated or needed to prevent glass lites from moving sideways
in glazing channel, as recommended in writing by glass manufacturer and according to
requirements in referenced glazing publications.
H. Set glass lites in each series with uniform pattern, draw, bow, and similar characteristics.
I. Set glass lites with proper orientation so that coatings face exterior or interior as specified.
J. Where wedge-shaped gaskets are driven into one side of channel to pressurize sealant or
gasket on opposite side, provide adequate anchorage so gasket cannot walk out when
installation is subjected to movement.
K. Square cut wedge-shaped gaskets at corners and install gaskets in a manner recommended by
gasket manufacturer to prevent corners from pulling away; seal corner joints and butt joints with
sealant recommended by gasket manufacturer.
3.4 TAPE GLAZING
A. Position tapes on fixed stops so that, when compressed by glass, their exposed edges are flush
with or protrude slightly above sightline of stops.
B. Install tapes continuously, but not necessarily in one continuous length. Do not stretch tapes to
make them fit opening.
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C. Cover vertical framing joints by applying tapes to heads and sills first, then to jambs. Cover
horizontal framing joints by applying tapes to jambs, then to heads and sills.
D. Place joints in tapes at corners of opening with adjoining lengths butted together, not lapped.
Seal joints in tapes with compatible sealant approved by tape manufacturer.
E. Do not remove release paper from tape until right before each glazing unit is installed.
F. Apply heel bead of elastomeric sealant.
G. Center glass lites in openings on setting blocks, and press firmly against tape by inserting
dense compression gaskets formed and installed to lock in place against faces of removable
stops. Start gasket applications at corners and work toward centers of openings.
H. Apply cap bead of elastomeric sealant over exposed edge of tape.
3.5 GASKET GLAZING (DRY)
A. Cut compression gaskets to lengths recommended by gasket manufacturer to fit openings
exactly, with allowance for stretch during installation.
B. Insert soft compression gasket between glass and frame or fixed stop so it is securely in place
with joints miter cut and bonded together at corners.
C. Installation with Drive-in Wedge Gaskets: Center glass lites in openings on setting blocks, and
press firmly against soft compression gasket by inserting dense compression gaskets formed
and installed to lock in place against faces of removable stops. Start gasket applications at
corners and work toward centers of openings. Compress gaskets to produce a weather tight
seal without developing bending stresses in glass. Seal gasket joints with sealant
recommended by gasket manufacturer.
D. Installation with Pressure-Glazing Stops: Center glass lites in openings on setting blocks, and
press firmly against soft compression gasket. Install dense compression gaskets and pressure-
glazing stops, applying pressure uniformly to compression gaskets. Compress gaskets to
produce a weather tight seal without developing bending stresses in glass. Seal gasket joints
with sealant recommended by gasket manufacturer.
E. Install gaskets so they protrude past face of glazing stops.
3.6 SEALANT GLAZING (WET)
A. Install continuous spacers, or spacers combined with cylindrical sealant backing, between glass
lites and glazing stops to maintain glass face clearances and to prevent sealant from extruding
into glass channel and blocking weep systems until sealants cure. Secure spacers or spacers
and backings in place and in position to control depth of installed sealant relative to edge
clearance for optimum sealant performance.
B. Force sealants into glazing channels to eliminate voids and to ensure complete wetting or bond
of sealant to glass and channel surfaces.
C. Tool exposed surfaces of sealants to provide a substantial wash away from glass.
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3.7 LOCK-STRIP GASKET GLAZING
A. Comply with ASTM C 716 and gasket manufacturer's written instructions. Provide
supplementary wet seal and weep system unless otherwise indicated.
3.8 CLEANING AND PROTECTION
A. Immediately after installation remove nonpermanent labels and clean surfaces.
B. Protect glass from contact with contaminating substances resulting from construction
operations. Examine glass surfaces adjacent to or below exterior concrete and other masonry
surfaces at frequent intervals during construction, but not less than once a month, for buildup of
dirt, scum, alkaline deposits, or stains.
1. If, despite such protection, contaminating substances do come into contact with glass,
remove substances immediately as recommended in writing by glass manufacturer.
Remove and replace glass that cannot be cleaned without damage to coatings.
C. Remove and replace glass that is damaged during construction period.
D. Wash glass on both exposed surfaces not more than four days before date scheduled for
inspections that establish date of Substantial Completion. Wash glass as recommended in
writing by glass manufacturer.
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