HomeMy WebLinkAbout08-8123-Exterior-Glass-Glazing_Rev_1Dennis Yarmouth Intermediate Middle School January 19, 2021
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EXTERIOR GLASS GLAZING
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SECTION 08 8123
EXTERIOR GLASS GLAZING
(Part of Filed Sub-Bid Section 08 0001 - Metal Windows)
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. Work Included: Provide labor, materials and equipment necessary to complete the work of this
Section, including but not limited to the following:
1. Field-glazing the following products and applications:
a. Aluminum-framed storefronts.
b. Interior aluminum-framed storefronts for interior vestibule framing.
c. Exterior aluminum-framed entrance doors glazed with tempered insulating glass.
d. Interior aluminum-framed (vestibule) entrance doors glazed with tempered
non-insulating glass.
e. Aluminum curtain wall framing.
2. Section Includes:
a. Glass products.
b. Insulating glass.
c. Glazing sealants.
d. Glazing tapes.
e. Miscellaneous glazing materials.
f. Field-applied security window film.
3. Other items indicated on Drawings as Work of this Section.
B. Related Requirements:
1. Section 01 8113 “Sustainable Design Requirements” for general requirements and
procedures for compliance with certain USGBC LEED prerequisites and credits.
2. Section 01 9113 “General Commissioning Requirements."
3. Section 01 9119 “Facility Shell Commissioning” for general requirements and procedures
for building envelope commissioning.
4. Section 08 1216 "Aluminum Frames" for interior aluminum frames for wood doors
installed in gypsum board partitions.
5. 08 3613.13 “Glazed Aluminum Sectional Doors” for factory-glazed sectional doors.
6. Section 08 3619 “Multi-Leaf Vertical Lift Doors” for factory-glazed multi-leaf vertical lift
doors.
7. Section 08 4113 “Aluminum-Framed Entrances and Storefronts” for field-glazed
aluminum storefront framing and entrance doors.
8. Section 08 4413 “Glazed Aluminum Curtain Walls" for field-glazed aluminum curtain
walls.
9. Section 08 5113 “Aluminum Windows" for factory-glazed aluminum windows.
10. Section 08 5619 “Pass Windows” for factory-glazed transaction pass windows.
11. Section 08 5653 “Security Windows” for factory-glazed transaction security windows.
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12. Section 08 8813 "Fire-Rated Glazing" for fire-protection-rated glazing, for use in fire-rated
door assemblies.
13. Section 08 8853 “Security Glazing” for field-glazing bullet-resistant-rated metal doors.
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 in accordance with
ASTM C1036.
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 to achieve
proper safety margins for glazing retention under each design load case, load case
combination, and service condition.
1.5 PREINSTALLATION MEETINGS
A. Preinstallation 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.
1.6 ACTION SUBMITTALS
A. Make Submittals in accordance with Section 01 3300 “Submittal Procedures.”
B. Product Data: For each type of product.
C. Sustainable Design Submittals:
1. Adhesives And Sealants: Provide manufacturers' or third-party certification of testing to
and compliance with the California Department of Public Health (CDPH) Standard
method v1.2-2017, that includes the following information:
a. The exposure scenario used to determine compliance.
b. The range of total VOCs after 14 days, measured as specified in the CDPH
Standard Method v1.2:
1) 0.5 mg/m^3 or less;
2) Between 0.5 and 5.0 mg/m^3; or
3) 5.0 mg/m^3 or more.
c. Laboratory accreditation under ISO/IEC 17025.
d. Claims of compliance for wet-applied products must state the amount applied in
mass per surface area.
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e. Provide MSDS or other manufacturer documentation with disclosure of VOC
content for all wet-applied products.
f. Complete "LEED Materials Documentation Sheet" with IEQc2 information for
adhesives/sealants installed within the waterproofing membrane.
D. Glass Samples: For each type of the following products; 12 inches square.
1. Insulating glass.
2. Spandrel glass.
3. Glass with security window film applied.
E. Glazing Accessory Samples: For sealants and colored spacers, in 12-inch lengths. Install
sealant Samples between two strips of material representative in color of adjoining framing
system.
F. Glazing Schedule: List glass types and thicknesses for each size opening and location. Use
same designations indicated on Drawings.
G. Delegated Design Submittal: For glass indicated to comply with performance requirements and
design criteria, including analysis data signed and sealed by qualified professional engineer
responsible for their preparation.
1.7 INFORMATIONAL SUBMITTALS
A. Qualification Data: For Installer and manufacturers of fabricated glass units.
B. Product Certificates: For glass.
C. Product Test Reports: For fabricated 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. Fabricated-Glass Manufacturer Qualifications: A qualified manufacturer of fabricated glass
units who is approved and certified by primary glass manufacturer.
B. Installer Qualifications: A qualified glazing contractor for this Project who is certified under the
North American Contractor Certification Program (NACC) for Architectural Glass & Metal
(AG&M) contractors and who employs glazing technicians certified under the Architectural
Glass and Metal Technician (AGMT) certification program.
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 C1021 to conduct the testing indicated.
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E. Mockups: Build mockups to demonstrate aesthetic effects and to set quality standards for
materials and execution.
1. Install glazing in integrated exterior wall mockups specified in Section 01 4339
“Mockups.”
2. Install glazing in mockups specified in Section 08 4113 "Aluminum-Framed Entrances
and Storefronts" and Section 08 4413 "Glazed Aluminum Curtain Walls" to match glazing
systems required for Project, including glazing methods.
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 C1087 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 use of specially formulated primers.
1.10 DELIVERY, STORAGE, AND HANDLING
A. Protect glazing materials in accordance with manufacturer's written instructions. Prevent
damage to glass and glazing materials from condensation, temperature changes, direct
exposure to sun, or other causes.
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.
B. 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
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EXTERIOR GLASS GLAZING
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glass breakage or to maintaining and cleaning insulating glass contrary to manufacturer's
written instructions. Evidence of failure is obstruction of vision by dust, moisture, or film on
interior surfaces of glass.
1. Warranty Period: 10 years from date of Substantial Completion.
C. Manufacturer's Special Warranty on Security Window Film: Manufacturer's standard form in
which security window film manufacturer agrees to replace security window films that
deteriorate within specified warranty period. Deterioration of security window film is defined as
defects developed from normal use that are not attributed to deliberate glass breakage or to
maintaining and cleaning glass widow film contrary to manufacturer's written instructions.
Defects include glass failure due to thermal shock, seal failure and blemishes.
1. Warranty Period: Five years from date of Substantial Completion.
PART 2 - PRODUCTS
2.1 MANUFACTURERS
A. Basis-of-Design Glass Products: Subject to compliance with requirements, provide products
indicated in the Glass Schedules Articles in Part 3 of this Section, or comparable products by
one of the following or equal:
1. AGC Glass Company North America, Inc.
2. Cardinal Glass Industries.
3. Guardian Industries Corp.
4. Oldcastle BuildingEnvelope.
5. Pilkington North America Inc.
6. PPG Industries, Inc.
7. Saint-Gobain Corporation.
8. Schott North America, Inc.
9. Viracon, Inc.
B. Source Limitations for Glass: Obtain coated glass from single source from single manufacturer.
C. Source Limitations for Glazing Accessories: For each product and installation method, obtain
from single source from single manufacturer.
2.2 LEED REQUIREMENTS
A. Adhesives And Sealants: For field applications that are inside the weatherproofing membrane:
Adhesives/sealants must be tested and determined compliant in accordance with California
Department of Public Health (CDPH) Standard Method v1.2-2017, using the applicable
exposure scenario. The default scenario is the private office scenario.
1. All adhesives/sealants wet-applied on site must meet the applicable chemical content
requirements of SCAQMD Rule 1168, October 6, 2017, Adhesive and Sealant
Applications, as analyzed by the methods specified in Rule 1168. The provisions of
SCAQMD Rule 1168 do not apply to adhesives and sealants subject to state or federal
consumer product VOC regulations.
2.3 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
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EXTERIOR GLASS GLAZING
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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 4000
"Quality Requirements," to design glazing.
C. Structural Performance: Glazing shall withstand the following design loads within limits and
under conditions indicated determined in accordance with the IBC and ASTM E1300:
1. Design Wind Pressures: As indicated on Drawings.
a. Wind Design Data: As indicated on Drawings.
b. Importance Factor: 1.0.
c. Exposure Category: B.
2. 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.
3. Thermal Loads: Design glazing to resist thermal stress breakage induced by differential
temperature conditions and limited air circulation within individual glass lites and
insulated glazing units.
D. Windborne-Debris-Impact Resistance: Exterior glazing shall pass ASTM E1886 missile-impact
and cyclic-pressure tests in accordance with ASTM E1996 for Wind Zone 3 for basic protection.
1. Large-Missile Test: For glazing located within 30 feet of grade.
2. Small-Missile Test: For glazing located between 30 feet and 60 feet above grade.
D.E. Safety Glazing: Where safety glazing is indicated, provide glazing that complies with
16 CFR 1201, Category II.
E.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 6 mm thick.
2. For insulating-glass units, properties are based on units of thickness indicated for overall
unit and for each lite.
3. U-Factors: Center-of-glazing values, in accordance with NFRC 100 and based on most
current non-beta version of LBL's WINDOW computer program, expressed as Btu/sq. ft.
x h x deg F.
4. SHGC and Visible Transmittance: Center-of-glazing values, in accordance with
NFRC 200 and based on most current non-beta version of LBL's WINDOW computer
program.
5. Visible Reflectance: Center-of-glazing values, in accordance with NFRC 300.
2.4 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. NGA Publications: "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 or another certification agency acceptable to authorities having
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jurisdiction or manufacturer. Label shall indicate manufacturer's name, type of glass, thickness,
and safety glazing standard with which glass complies.
C. Insulating-Glass Certification Program: Permanently marked either on spacers or on at least
one component lite of units with appropriate certification label of the IGCC.
D. Thickness: Where glass thickness is indicated, it is a minimum. Provide glass that complies
with performance requirements and is not less than thickness indicated.
1. Minimum Glass Thickness for Exterior Lites: 6 mm.
E. 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.
2.5 GLASS PRODUCTS
A. Clear Annealed Float Glass: ASTM C1036, Type I, Class 1 (clear), Quality-Q3.
B. Low-Iron Annealed Float Glass: ASTM C1036, Type I, Class I (clear), Quality-Q3; and with
visible light transmission of not less than 91 percent.
B.C. Fully Tempered Float Glass: ASTM C1048, 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.
C.D. Heat-Strengthened Float Glass: ASTM C1048, 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.
D. Ceramic-Coated Spandrel Glass: ASTM C1048, Type I, Condition B, Quality-Q3.
2.6 INSULATING GLASS
A. Insulating-Glass Units: Factory-assembled units consisting of sealed lites of glass separated by
a dehydrated interspace, qualified in accordance with ASTM E2190.
1. Sealing System: Dual seal, with manufacturer's standard primary and secondary
sealants.
2. Perimeter Spacer: Thermally broken aluminum or nonmetallic tube.
3. Desiccant: Molecular sieve or silica gel, or a blend of both.
2.7 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,
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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. Colors of Exposed Glazing Sealants: As selected by Architect from manufacturer's full
range of industry colors.
B. Neutral-Curing Silicone Glazing Sealant, Class 100/50: Complying with ASTM C920, Type S,
Grade NS, Use NT.
2.8 GLAZING TAPES
A. Back-Bedding Mastic Glazing Tapes: Preformed, butyl-based, 100 percent solids elastomeric
tape; nonstaining and nonmigrating in contact with nonporous surfaces; with or without spacer
rod as recommended in writing by tape and glass manufacturers for application indicated; and
complying with ASTM C1281 and AAMA 800 for products indicated below:
1. AAMA 806.3 tape, for glazing applications in which tape is subject to continuous
pressure.
2. AAMA 807.3 tape, for glazing applications in which tape is not subject to continuous
pressure.
2.9 FIELD-APPLIED SECURITY WINDOW FILM
A. Security Window Film: Translucent, dimensionally stable, cast PVC film, 8-mil- minimum
thickness, with pressure-sensitive, clear adhesive back for adhering to glass and releasable
protective backing.
1. Basis-of-Design Product: Subject to compliance with requirements, provide 3M™
Scotchshield™ Ultra Safety and Security Window Film, Ultra 800 Series by 3M, St. Paul,
MN, or comparable product by one of the following or equal:
a. Gila Safety & Security Film.
b. LLumar Safety and Security Window Films by Eastman Chemical Company.
2.10 MISCELLANEOUS GLAZING MATERIALS
A. General: Provide products of material, size, and shape complying with referenced glazing
standard, recommended in writing by 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: Type recommended in writing by sealant or glass manufacturer.
D. Spacers: Type recommended in writing by sealant or glass manufacturer.
E. Edge Blocks: Type recommended in writing by sealant or glass manufacturer.
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2.11 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.
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.
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.
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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 in accordance with
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.
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.
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.
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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 weathertight
seal without developing bending stresses in glass. Seal gasket joints with sealant
recommended in writing 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 weathertight seal without developing bending stresses in glass. Seal gasket joints
with sealant recommended in writing 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.
3.7 SECURITY WINDOW FILM INSTALLATION
A. Apply security window film squarely aligned to glass edges, uniformly smooth, and free from
tears, air bubbles, wrinkles, and rough edges, in single sheet completely overlaying the back
face of clean glass, according to manufacturer's written instructions, including surface
preparation and application temperature limitations.
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 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.
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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.
3.9 MONOLITHIC GLASS SCHEDULE
A. Tempered Glass: Tempered float glass, ASTM C1048, Kind FT, Condition A, Type I, Class 1,
Quality q3.
1. Thickness: 6 mm.
2. Safety glazing required.
3.10 INSULATING GLASS SCHEDULE
A. Solar-Control Low-E Insulating-Glass Units IGU-1A:
1. Basis-of-Design Product: As indicated on Drawings.
2. Overall Unit Thickness and Thickness of Each Lite: 25 and 6.0-mm.
3. Interspace Content: As indicated on Drawings.
4. Outdoor Lite: As indicated on Drawings.
5. Indoor Lite: As indicated on Drawings.
6. Low-E Coating: As indicated on Drawings.
7. Performance Characteristics:
a. Winter Nighttime U-Value: 0.17 maximum.
b. Summer Daytime U-Value: 0.17 maximum.
c. Solar Heat Gain Coefficient (SHGC): 0.37 maximum.
B. Solar-Control Low-E Insulating-Glass Units IGU-1B:
1. Basis-of-Design Product: As indicated on Drawings.
2. Overall Unit Thickness and Thickness of Each Lite: 25 and 6.0-mm.
3. Interspace Content: As indicated on Drawings.
4. Outdoor Lite: As indicated on Drawings.
5. Indoor Lite: As indicated on Drawings.
6. Low-E Coating: As indicated on Drawings.
7. Performance Characteristics:
a. Winter Nighttime U-Value: 0.17 maximum.
b. Summer Daytime U-Value: 0.17 maximum.
c. Solar Heat Gain Coefficient (SHGC): 0.37 maximum.
C. Solar-Control Low-E Insulating-Glass Units IGU-2A:
1. Basis-of-Design Product: As indicated on Drawings.
2. Overall Unit Thickness and Thickness of Each Lite: 25 and 6.0-mm.
3. Interspace Content: As indicated on Drawings.
4. Outdoor Lite: As indicated on Drawings.
5. Indoor Lite: As indicated on Drawings.
6. Low-E Coating: As indicated on Drawings.
7. Performance Characteristics:
a. Winter Nighttime U-Value: 0.17 maximum.
b. Summer Daytime U-Value: 0.17 maximum.
c. Solar Heat Gain Coefficient (SHGC): 0.20 maximum.
D. Solar-Control Low-E Insulating-Glass Units IGU-2B:
1. Basis-of-Design Product: As indicated on Drawings.
2. Overall Unit Thickness and Thickness of Each Lite: 25 and 6.0-mm.
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011 Addendum No. 3, February 19, 2021
EXTERIOR GLASS GLAZING
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3. Interspace Content: As indicated on Drawings.
4. Outdoor Lite: As indicated on Drawings.
5. Indoor Lite: As indicated on Drawings.
6. Low-E Coating: As indicated on Drawings.
7. Performance Characteristics:
a. Winter Nighttime U-Value: 0.17 maximum.
b. Summer Daytime U-Value: 0.17 maximum.
c. Solar Heat Gain Coefficient (SHGC): 0.20 maximum.
E.A. Spandrel Glass: Ceramic-coated, low-E, insulating spandrel glass.
1. Basis-of-Design Product: Solarscreen VE 1-2M with Viraspan Opaque Ceramic Frit by
Viracon, Inc.
2. Coating Color: As selected by Architect from manufacturer's full range.
3. Overall Unit Thickness: 1 inch.
4. Minimum Thickness of Each Glass Lite: 6 mm.
5. Outdoor Lite: Heat-strengthened float glass.
6. Interspace Content: Argon.
7. Indoor Lite: Heat-strengthened float glass.
8. Low-E Coating: Sputtered on second surface.
9. Opaque Coating Location: Fourth surface.
10. Winter Nighttime U-Value: 0.25 maximum.
11. Summer Daytime U-Value: 0.21 maximum.
3.11 INSULATING-LAMINATED-GLASS SCHEDULE
A. Low-E-Coated, Insulating Laminated Glass Units (IGU-1A):
1. Basis-of-Design Product: As indicated on Drawings.
2. Overall Unit Thickness: 1-5/16 inch.
3. Outdoor Lite: Heat-strengthened float glass.
a. Thickness of Outdoor Lite: 6.0 mm.
4. Low-E Coating: Sputtered on second surface (Solarban 60).
5. Indoor Lite: Clear laminated glass with two plies of heat-strengthened float glass.
a. Thickness of Each Glass Ply: 6.0 mm.
b. Interlayer Thickness: 0.090 inch.
6. Performance Characteristics:
a. U-Value: 0.17.
b. Solar Heat Gain Coefficient (SHGC): 0.37.
B. Low-E-Coated, Insulating Laminated Glass Units (IGU-1B):
1. Basis-of-Design Product: As indicated on Drawings.
2. Overall Unit Thickness: 1-5/16 inch.
3. Outdoor Lite: Heat-strengthened float glass.
a. Thickness of Outdoor Lite: 6.0 mm.
4. Low-E Coating: Sputtered on second surface (Solarban 60).
5. Indoor Lite: Clear laminated glass with two plies of heat-strengthened float glass.
a. Thickness of Each Glass Ply: 6.0 mm.
b. Interlayer Thickness: 0.090 inch.
c. Acid Etch No. 4 surface.
6. Performance Characteristics:
a. U-Value: 0.17.
b. Solar Heat Gain Coefficient (SHGC): 0.37.
C. Low-E-Coated, Insulating Laminated Glass Units (IGU-2A):
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EXTERIOR GLASS GLAZING
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1. Basis-of-Design Product: As indicated on Drawings.
2. Overall Unit Thickness: 1-5/16 inch.
3. Outdoor Lite: Heat-strengthened float glass.
a. Thickness of Outdoor Lite: 6.0 mm.
4. Low-E Coating: Sputtered on second surface (Solarban 90).
5. Indoor Lite: Clear laminated glass with two plies of heat-strengthened float glass.
a. Thickness of Each Glass Ply: 6.0 mm.
b. Interlayer Thickness: 0.090 inch.
6. Low-E Coating: Sputtered on second surface.
7. Performance Characteristics:
a. U-Value: 0.17.
b. Solar Heat Gain Coefficient (SHGC): 0.20.
D. Low-E-Coated, Insulating Laminated Glass Units (IGU-2B):
1. Basis-of-Design Product: As indicated on Drawings.
2. Overall Unit Thickness: 1-5/16 inch.
3. Outdoor Lite: Heat-strengthened float glass.
a. Thickness of Outdoor Lite: 6.0 mm.
4. Low-E Coating: Sputtered on second surface (Solarban 90).
5. Indoor Lite: Clear laminated glass with two plies of heat-strengthened float glass.
a. Thickness of Each Glass Ply: 6.0 mm.
b. Interlayer Thickness: 0.090 inch.
6. Performance Characteristics:
a. U-Value: 0.17.
b. Solar Heat Gain Coefficient (SHGC): 0.20.
END OF SECTION