July 22, 1994

Contract #TW0592

**SPECIAL** **SPECIFICATION**

**SECTION 08800-S**

**[GLASS AND GLAZING]{.underline}**

Page

PART I - GENERAL

1.01 Description Of Work 2

1.02 References 2

1.03 System Description 3

1.04 Submittals 4

1.05 Quality Assurance 4

1.06 Delivery, Storage, And Handling 5

1.07 Project Conditions 5

1.08 Warranty 5

PART 2 - PRODUCTS

2.01 Manufacturers 6

2.02 Glass Products-General 7

2.03 Primary Glass Products 7

2.04 Heat-Treated Glass Products 7

2.05 Laminated Glass 7

2.06 Sealed Insulating Glass Units 8

2.07 Laminated Glass Products 9

2.08 Elastomeric Glazing Sealants And Preformed Glazing Tapes 9

2.09 Glazing Gaskets 11

2.10 Miscellaneous Glazing Materials 11

PART 3 - EXECUTION

3.01 Examination 11

3.02 Preparation 12

3.03 Glazing - General 12

3.04 Glazing 12

3.05 Mirrors 13

3.06 Protection And Cleaning 13

3.07 Glazing Schedule 14

SPECIAL SPECIFICATION

SECTION 08800-S

GLASS AND GLAZING

# PART I - GENERAL

## 1.01 [DESCRIPTION OF WORK]{.underline}

A. [Definitions]{.underline}: \"Glass\" includes prime glass, processed
glass and fabricated glass products. \"Glazing\" includes glass
installation and materials used to install glass.

B. [Extent of glass]{.underline} and glazing work is indicated on
drawings and schedules.

C. [Types of work]{.underline} in this section include glass and glazing
for:

1\. Window units, not indicated as \"preglazed\"

2\. Storefront construction

4\. Frameless mirrors

5\. Transoms

6\. Borrowed lights

7\. Glazed curtain wall

## 1.02 [references]{.underline}

A. [American Society for Testing and Materials (ASTM)]{.underline}

C509 Specification for Cellular Elastomeric Preformed Gasket and Sealing
Material

C542 Specification for Lock-Strip Gaskets

C716 Specification for Installing Lock-Strip Gaskets and Infill Glazing
Materials

C719 Test Method for Adhesion and Cohesion of Elastomeric Joint Sealants
Under Cyclic Movement (Hockman Cycle)

C794 Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants

C864 Specification for Dense Elastomeric Compression Seal Gaskets,
Setting Blocks, and Spacers

C920 Specification for Elastomeric Joint Sealants

C1036 Specification for Flat Glass

C1048 Specification for Heat-Treated Flat Glass - Kind HS, Kind FT
Coated and Uncoated Glass

E163 Methods of Fire Tests of Window Assemblies

E774 Specification for Sealed Insulating Glass Units

B. [American Architectural Manufacturers Asso. (AAMA)]{.underline}

800 Voluntary Specifications and Test Methods for Sealants

C. [American National Standards Institute (ANSI)]{.underline}

Z97.1 Safety Performance and Methods of Test for Safety Glazing Material
Used in Buildings

D. [Associated Laboratories, Inc. (ALI)]{.underline}

E. [Code of Federal Regulations (CFR)]{.underline}

16 CFR Part 1201 Safety Standard for Architectural Glazing Materials

F. [Insulating Glass Certification Council (IGCC)]{.underline}

G. [National Fire Protection Assoc. (NFPA)]{.underline}

80 Standard for Fire Doors and Windows

H. [Safety Glazing Certification Council (SGCC)]{.underline}

I7. [Underwriters Laboratories, Inc. (UL)]{.underline}

9 Fire Tests of Window Assemblies

## 1.03 [SYSTEM DESCRIPTION]{.underline}

[Glass And Glazing]{.underline}: Provide glass and glazing that has been
produced, fabricated and installed to withstand normal thermal movement,
wind loading and impact loading (where applicable), without failure
including loss or breakage of glass, failure of sealants or gaskets to
remain watertight and airtight, deterioration of glass and glazing
materials and other defects in the work.

A. [Normal thermal movement]{.underline} is defined as that resulting
from an ambient temperature range of 120 degrees F (67 degrees C) and
from a consequent temperature range within glass and glass framing
members of 180 degrees F (100 degrees C).

B. [Deterioration of laminated glass]{.underline} is defined as the
development of manufacturing defects including edge separation or
delamination which materially obstructs vision through glass.

## 1.04 [SUBMITTALS]{.underline}

The following shall be submitted in accordance with Division 1, Section
\" Descriptive Submittals\":

A. [Product Data]{.underline}: Submit manufacturer\'s catalog data for
each glazing material and fabricated glass product required, including
installation and maintenance instructions.

B. [Drawings]{.underline}: Complete detailed drawings showing the
proposed setting methods and materials shall be submitted for approval.

C. [Material Safety Data Sheets (MSDS)]{.underline}: Submit MSDS for
glazing materials, including sealant, tape, and gasket.

D. [Certificates of Compliance]{.underline}: Provide certificates of
compliance attesting that the glass meets the requirements specified, to
include manufacturer\'s labels designating type and thickness of glass.

E. [Compatibility and Adhesion Test Report]{.underline}: Submit
statement from sealant manufacturer indicating that glass and glazing
materials have been tested for compatibility and adhesion with glazing
sealants, including interpretation of test results relative to material
performance with recommendations for primers and substrate preparation
needed to obtain adhesion.

## 1.05 [QUALITY ASSURANCE]{.underline}

A. [Primary Glass Standard]{.underline}: Provide primary glass which
complies with ASTM C1036 requirements, (unless otherwise specified)
including those indicated by reference to type, class, quality, and, if
applicable, form, finish, mesh and pattern.

B. [Glazing Standards]{.underline}: Comply with recommendations of FGMA
\"Glazing Manual\" and \"Sealant Manual\" except where more stringent
requirements are indicated. Refer to those publications for definitions
of glass and glazing terms not otherwise defined in this section or
other referenced standards.

C. [Safety Glazing Standard]{.underline}: Where safety glass is
indicated or required, provide type of products indicated which comply
with ANSI Z97.1 and testing requirements of 16 CFR Part 1201 for
Category II materials.

Provide safety glass permanently marked with certification label of SGCC
or other certification agency acceptable to the SDR.

D. [Heat-Treated Glass Standard]{.underline}: Provide heat-treated glass
which complies with ASTM C1048 requirements, including those indicated
by reference to kind, condition, type, quality, class and, if
applicable, form, finish, and pattern.

E. [Elastomeric Sealant Standard]{.underline}: Provide manufacturer\'s
standard chemically curing, elastomeric sealant of base polymer
indicated which complies with ASTM C920 requirements, including those
for type, grade, class and uses.

F. [Fire-Resistant Rated Wire Glass]{.underline}: Provide wire glass
products that are identical to those tested per ASTM E163 (UL 9) and are
labeled and listed by UL or other testing and inspecting agency.

G. [Insulating Glass Certification Program]{.underline}: Provide
insulating glass units permanently marked either on spacers or at least
one component pane of units with appropriate certificate label of
inspecting and testing organizations indicated below:

1\. IGCC

2\. ALI

H. [Single Source Responsibility for Glass]{.underline}: To ensure
consistent quality of appearance and performance, provide materials
produced by a single manufacturer or fabricator for each kind and
condition of glass indicated and composed of primary glass obtained from
a single source for each type and class required.

I. [Installer (Glazier)]{.underline}: Firm with not less than 5 years
experience in glazing work similar to required work.

J. [All materials used]{.underline} shall not contain asbestos fibers.

## 1.06 [DELIVERY, STORAGE, AND HANDLING]{.underline}

[Protect glass and glazing materials]{.underline} during delivery,
storage and handling. Comply with manufacturer\'s instructions to
prevent edge damage to glass, damage to glass and glazing materials from
effects of moisture including condensation, temperature changes, direct
exposure to sun, and from other causes.

Where insulating glass units will be exposed to substantial altitude
changes, avoid hermetic seal ruptures by complying with insulating glass
fabricator\'s recommendations for venting and sealing.

## 1.07 [PROJECT CONDITIONS]{.underline}

[Environmental Conditions]{.underline}: Do not proceed with glazing when
ambient and substrate temperature conditions are outside the limits
permitted by glazing material manufacturer or when joint substrates are
wet due to rain, frost, condensation or other causes.

## 1.08 [WARRANTY]{.underline}

A. [Special Warranty on Mirror Glass:]{.underline} Manufacturer\'s
special written project warranty shall be provided, agreeing to furnish
f.o.b. point of manufacture, freight allowed project site, within
specified warranty period indicated below, replacements for those mirror
glass units which develop manufacturing defects. Manufacturing defects
are defined as peeling, cracking, or deterioration in metallic coating
due to normal conditions and not due to handling or installation or
cleaning practices contrary to glass manufacturer\'s published
instructions. Include labor replacement costs in warranty.

[Warranty Period]{.underline}: Manufacturer\'s standard but not less
than 5 years after date of substantial completion.

B. [Special Warranty Insulating Glass]{.underline}: Manufacturer\'s
special written project warranty shall be provided, agreeing to furnish
f.o.b. point of manufacture, freight allowed project site, within
specified warranty period indicated below, replacements for those
insulating glass units developing manufacturing defects. Manufacturing
defects are defined as failure of hermetic seal or loss of dehydration
(beyond that due to glass breakage) as evidenced by intrusion of dirt or
moisture, internal condensation or fogging, deterioration of protected
internal glass coatings, and other visual indications of seal failure or
performance, provided the manufacturer\'s published instructions for
handling, installing, protecting and maintaining units have been
complied with during the warranty period. Include labor replacement
costs in warranty.

[Warranty Period]{.underline}: Manufacturer\'s standard but not less
than 10 years after date of substantial completion.

C. [Manufacturer's Warranty on Laminated Glass]{.underline}: Submit
written warranty signed by insulating glass manufacturer agreeing to
furnish replacements for those laminated glass units that deteriorate
due to normal conditions of use and not to handling, installing, and
cleaning.

[Warranty Period]{.underline}: Not less than 5 years after date of
substantial completion.

1\. [Reasons for Replacement]{.underline}: Defects developed from normal
use that are attributed to the manufacturing process and not to glass
breakage or cleaning. Defects include edge separation, delamination
materially obstructing vision through glass, and excessive blemishes.

# PART 2 - PRODUCTS

## 2.01 [MANUFACTURERS]{.underline}

A. [Available Manufacturers]{.underline}: Subject to compliance with
requirements, manufacturers offering products which may be incorporated
in the work include, but are not limited to, the following:

1\. Exterior Glazing

Ford Glass Division

Guardian Industries Corp.

LOF Glass,Inc.

PPG Industries, Inc.

Viracon, Inc.

2\. Other Glass

AFG Industries, Inc.

Ford Glass Division

Guardian Industries Corp.

PPG Industries, Inc.

Viracon, Inc.

# 2.02 GLASS PRODUCTS-GENERAL

> [Sizes]{.underline}: Fabricate glass to sizes required for glazing
> openings indicated, with edge clearances and tolerances complying with
> recommendations of glass manufacturer. Provide thicknesses indicated.

# 

# 2.03 PRIMARY GLASS PRODUCTS

A. [Clear Float Glass]{.underline}: Type I (transparent glass, flat),
Class 1 (clear), Quality q3 (glazing select), 1/4 inch (6.4 mm) thick
unless otherwise indicated.

C. [Wired Glass]{.underline}: Type II (patterned and wired glass, flat),
Class 1 (translucent), Quality q8 (glazing); complying with ANSI Z97.1;
1/4 inch (6.4 mm) thick; of form and mesh pattern indicated below. Glass
for fire-rated doors shall comply with NFPA 80.

1\. [Polished Wire Glass]{.underline}: Form 1 (wired, polished both
sides), Mesh m1 (diamond).

D. [Mirror Glass]{.underline}: Type I, Class 1, Quality q2, edges
square-cut and polished, 1/4 inch (6.4 mm) thick.

E. Refer to Glazing Schedule, Article 3.07.

# 2.04 HEAT-TREATED GLASS PRODUCTS

A. [Manufacturing Process]{.underline}: Manufacture heat-treated glass
by vertical (tong-held) or horizontal (roller hearth) process, at
manufacturer\'s option, except provide horizontal process where
indicated as \"tongless\" or \"free of tong marks.\"

B. [Uncoated Clear Heat-Treated Float Glass]{.underline}: Condition A
(uncoated surfaces), Type I (transparent glass, flat), Class 1 (clear),
Quality q3 (glazing select), kind as indicated:

2\. Kind FT (fully tempered) where indicated.

## 

## 

## 2.06 [SEALED INSULATING GLASS UNITS]{.underline}

A. [General]{.underline}: Provide preassembled units consisting of
organically sealed panes of glass enclosing a hermetically sealed
dehydrated air space and complying with ASTM E774 for performance
classification indicated, as well as with other requirements specified
for glass characteristics, air space, sealing system, sealant, spacer
material, corner design and desiccant.

B. [For properties of individual glass panes]{.underline} of made-up
units, refer to product requirements specified elsewhere in this section
applicable to types, classes, kinds and conditions of glass products
indicated.

C. [Provide heat-treated panes]{.underline} of kind and at locations
indicated and tempered where indicated or where safety glass is
designated or required.

D. [Performance Classification]{.underline}: per ASTM E774-Class A.

1\. [Exterior/Interior Panes]{.underline}: Clear float glass, Class 1.

2\. [Air Space Thickness]{.underline}: 1/2 inch (13 mm).

3\. [Sealing System]{.underline}: Manufacturer\'s standard.

4\. [Spacer Material]{.underline}: Manufacturer\'s standard metal.

5\. [Desiccant]{.underline}: Manufacturer\'s standard; either molecular
sieve or silica gel or blend of both.

6\. [Corner Construction]{.underline}: Manufacturer\'s standard corner
construction.

## 2.07 [LAMINATED GLASS PRODUCTS]{.underline}

A. [Laminated Glass Products]{.underline}: Comply with ASTM C 1172 for
kinds of laminated glass indicated and other requirements specified.
Refer to primary and heat-treated glass requirements relating to
properties of glass products comprising laminated glass products.

B. [Interlayer]{.underline}: Interlayer material as indicated below, in
clear or colors, and of thickness indicated with a proven record of no
tendency to bubble, discolor, or loose physical and mechanical
properties after laminating glass lites and installation.

1\. [Interlayer Material]{.underline}: Polyvinyl butyral sheets.

C. [Acceptable Manufacturers]{.underline}: Provide polyvinyl butyral
interlayer by one of the following manufacturers.

1\. Saflex, Monsanto Co.

2\. Butacite, E.I. du Pont de Nemours & Co., Inc.

D. [Laminating Process]{.underline}: Fabricate laminated glass to
produce glass free of foreign substances and air or glass pockets.

1\. Laminate lites with polyvinyl butyral interlayer in autoclave with
heat plus pressure.

## 

2.08 [ELASTOMERIC GLAZING SEALANTS AND PREFORMED GLAZING
TAPES]{.underline}

A. [General]{.underline}: Provide products of type indicated and
complying with the following requirements.

1\. [Compatibility]{.underline}: Select glazing sealants and tapes of
proven compatibility with other materials with which they will come into
contact, including glass products, seals of insulating glass units, and
glazing channel substrates, under conditions of installation and
service, as demonstrated by testing and field experiences.

2\. [Suitability]{.underline}: Comply with recommendations of sealant
and glass manufacturers for selection of glazing sealants and tapes
which have performance characteristics suitable for applications
indicated and conditions at time of installation.

3\. [Colors]{.underline}: Provide color of exposed sealants as selected
by the SDR from manufacturer\'s standard colors.

B. [Sealant Classification]{.underline}: Any sealant qualifying under
this specification shall be classified per ASTM C920 (except where
otherwise noted) as to type, grade, class, and use as follows:

1\. Type S - single component sealant.

2\. Type M - multicomponent sealant.

3\. Grade NS - nonsag or gunnable sealant that permits application in
joints on vertical surfaces without sagging or slumping when applied at
temperatures between 40 and 122 deg F (4.4 and 50 deg C).

4\. Use NT - sealant designed for use in joints in nontraffic areas.

5\. Use M - sealant that meets the requirements of ASTM C920 when tested
on mortar specimens in accordance with ASTM C719 and C794.

6\. Use G - sealant that meets the requirements of ASTM C920 when tested
on glass specimens in accordance with ASTM C719, C794 and C794 again
after ultraviolet exposure through glass.

7\. Use O - sealant that meets the requirements of ASTM C920 when tested
on substrates other than the standard substrates in accordance with ASTM
C719 and C794.

8\. Use A - sealant that meets the requirements of ASTM C920 when tested
on aluminum specimens in accordance with ASTM C719 and C794.

C. [Two-Part Polyurethane Glazing Sealant]{.underline}: Type M; Grade
NS; Class 25; uses NT, M, G, A, and, as applicable to uses indicated, O,
acceptable form for all glazing unless other sealant is specifically
indicated.

D. [One-Part Acid-Curing Silicone Glazing Sealant]{.underline}: Type S;
Grade NS; Class 25; uses NT, G, A, and, as applicable to uses indicated,
O, nonporous hard surface.

E. [One-Part Non-Acid-Curing Silicone Glazing Sealant]{.underline}: Type
S, Grade NS; Class 25; uses NT, G, A, and, as applicable to uses
indicated, O, porous bond surface.

F. [Preformed Butyl-Polyisobutylene Glazing Tape]{.underline}: Provide
manufacturer\'s standard solvent-free butyl-polyisobutylene formulation
with a solids content of 100 percent; complying with AAMA 800 Types A804
and A807; nonstaining and nonmigrating in contact with nonporous
surfaces; in extruded tape form; packaged on rolls with release paper on
one side; with or without continuous spacer rod as recommended by tape
and glass manufacturers for application indicated, interior use only.

## 2.09 [GLAZING GASKETS]{.underline}

A. [Lock-Strip Gaskets]{.underline}: Neoprene extrusions of size and
shape indicated, fabricated into frame with molded corner units and
zipper lock strips; complying with ASTM C542, black.

B. [Dense Elastomeric Compression Seal Gaskets]{.underline}: Molded or
extruded gaskets shall be of a neoprene material, complying with ASTM
C864, of profile and hardness required to maintain watertight seal.

C. [Cellular Elastomeric Preformed Gaskets]{.underline}: Extruded or
molded closed cell, integral-skinned neoprene of profile and hardness
required to maintain watertight seal; complying with ASTM C509, Type II,
black.

## 2.10 [MISCELLANEOUS GLAZING MATERIALS]{.underline}

A. [Cleaners, Primers and Sealers]{.underline}: Type recommended by
sealant or gasket manufacturer.

B. [Setting Blocks]{.underline}: Neoprene, EPDM or silicone blocks as
required for compatibility with glazing sealants, with a shore \"A\"
hardness of 80-90 Durometer.

C. [Spacers]{.underline}: Neoprene, EPDM or silicone blocks, or
continuous extrusions, as required for compatibility with glazing
sealant, of size, shape and hardness recommended by glass and sealant
manufacturers for application indicated.

D. [Edge Blocks]{.underline}: Neoprene, EPDM or silicone blocks as
required for compatibility with glazing sealant, of size and hardness
required to limit lateral movement (side-walking) of glass.

E. [Compressible Filler Rods]{.underline}: Closed-cell or
waterproof-jacketed rod stock of synthetic rubber or plastic foam,
flexible and resilient, with 5-10 psi (34-69 kPa) compression strength
for 25 percent deflection.

# PART 3 - EXECUTION

## 3.01 [EXAMINATION]{.underline}

[Require glazier to inspect work]{.underline} of glass framing erector
for compliance with manufacturing and installation tolerances, including
those for size, squareness, corners, presence and functioning of weep
system, existence of minimum required face or edge clearances, and
effective sealing of joinery. Obtain glazier\'s written report listing
conditions detrimental to performance of glazing work; provide copy of
report to SDR. Do not allow glazing work to proceed until unsatisfactory
conditions have been corrected.

## 3.02 [PREPARATION]{.underline}

[Clean glazing channels and other framing members]{.underline} to
receive glass immediately before glazing. Remove coatings which are not
firmly bonded to substrates. Remove lacquer from metal surfaces where
elastomeric sealants are indicated for use.

## 3.03 [GLAZING - GENERAL]{.underline}

A. [Comply with combined printed recommendations]{.underline} of glass
manufacturers, of manufacturers of sealants, gaskets and other glazing
materials, except where more stringent requirements are indicated,
including those of referenced glazing standards.

B. [Glazing channel dimensions]{.underline} as indicated on details are
intended to provide for necessary bite on glass, minimum edge and face
clearances, and adequate sealant thicknesses, with reasonable
tolerances. Adjust as required by job conditions at time of
installation.

C. [Protect glass from edge damage]{.underline} during handling and
installation; use a rolling block in rotating glass units to prevent
damage to glass corners. Do not impact glass with metal framing. Use
suction cups to shift glass units within openings; do not raise or drift
glass with a pry bar. Rotate glass with flares or bevels along one
horizontal edge which would occur in vicinity of setting blocks so that
these are located at top of opening. Remove from project and dispose of
glass units with edge damage or other imperfections of kind that, when
installed, weakens glass and impairs performance and appearance.

D. [Apply primers to joint surfaces]{.underline} where required for
adhesion of sealants, as recommended by sealant manufacturer.

# 3.04 GLAZING

A. [Install setting blocks]{.underline} of proper size in sill rabbet,
located one quarter of glass width from each corner, but with edge
nearest corner not closer than 6 inches (150 mm) from corner, unless
otherwise required. Set blocks in thin course of sealant which is
acceptable for heel bead use.

B. [Provide spacers]{.underline} inside and out, of correct size and
spacing to preserve required face clearances, for glass sizes larger
than 50 inches (130 cm) continuous (length plus height), except where
gaskets or glazing tapes with continuous spacer rods are used for
glazing. Provide 1/8 inch (3.2 mm) minimum bite of spacers on glass and
use thickness equal to sealant width, except with sealant tape use
thickness slightly less than final compressed thickness of tape.

C. [Provide edge blocking]{.underline} to comply with requirements of
referenced glazing standard, except where otherwise required by glass
unit manufacturer.

D. [Set units of glass]{.underline} in each series with uniformity of
pattern, draw, bow and similar characteristics.

E. [Provide compressible filler rods]{.underline} or equivalent back-up
material, as recommended by sealant and glass manufacturers, to prevent
sealant from extruding into glass channel weep systems and from adhering
to joints back surface as well as to control depth of sealant for
optimum performance, unless otherwise indicated.

F. [Force sealants into glazing channels]{.underline} to eliminate voids
and to ensure complete \"wetting\" or bond of sealant to glass and
channel surfaces.

G. [Tool exposed surfaces of sealants]{.underline} to provide a
substantial \"wash\" away from glass. Install pressurized tapes and
gaskets to protrude slightly out of channel, so as to eliminate dirt and
moisture pockets.

H. [Where wedge-shaped gaskets are driven]{.underline} into one side of
channel to pressurize sealant or gasket on opposite side, provide
adequate anchorage to ensure that gasket will not \"walk\" out when
installation is subjected to movement.

I. [Miter cut wedge-shaped gaskets]{.underline} at corners and install
gaskets in manner recommended by gasket manufacturer to prevent pull
away at corners; seal corner joints and butt joints with sealant
recommended by gasket manufacturer.

J. [Lock-strip gasket glazing]{.underline} shall comply with ASTM C716
and gasket manufacturer\'s printed recommendations. Provide
supplementary wet seal and weep system unless otherwise indicated.

## 3.05 [MIRRORS]{.underline}

A. [Cut mirrors]{.underline} to accurate sizes (with square edges) to
insure uniform butt joints not over 1/8 inch (3.2 mm) wide.

B. [Install mirrors]{.underline} with adhesive and mechanical fasteners
(clips). Apply one additional coat of moisture-resistance paint, of type
recommended by mirror manufacturer, to back of mirror, and allow to dry.
Apply mirror mastic to cover not more than 25% of back of mirror. Set
mirror in place and hold firmly against substrate until adhesive is set.
For mirror sizes up to 24\"x 36\" (61 cm x 91 cm) or 6 ft2 (5600 cm2),
install two clips at the top of the mirror and two clips along each
side. For sizes greater than 6 ft2 (5600 cm2), three clips shall be
installed at the top of the mirror and two clips along each side. All
mirrors shall be supported at the bottom by an \"L\" bar which shall
also be mechanically fastened to wall or substrate.

## 3.06 [PROTECTION AND CLEANING]{.underline}

A. [Protect exterior glass]{.underline} from breakage immediately upon
installation by use of crossed streamers attached to framing and held
away from glass. Do not apply markers to surfaces of glass. Remove
nonpermanent labels and clean surfaces.

B. [Protect glass]{.underline} from contact with contaminating
substances resulting from construction operations. If, despite such
protection, contaminating substances do come into contact with glass,
remove immediately by method recommended by glass manufacturer.

C. [Examine glass surfaces]{.underline} adjacent to or below exterior
concrete and other masonry surfaces at frequent intervals during
construction, but not less often than once a month, for build-up of
dirt, scum, alkali deposits or staining. When examination reveals
presence of these forms of residue, remove by method recommended by
glass manufacturer.

D. [Remove and replace glass]{.underline} which is broken, chipped,
cracked, abraded or damaged in other ways during construction period,
including natural causes, accidents and vandalism.

E. [Glass surfaces shall be thoroughly cleaned]{.underline} (not more
than four days prior to date scheduled for inspection to establish date
of substantial completion) with labels, paint spots, putty, and other
defacements removed, and shall be clean at the time the work is
accepted.

## 3.07 [GLAZING SCHEDULE]{.underline}

A. [Interior Glazing]{.underline}

[Type]{.underline} [Description]{.underline}

G1 1/4-inch clear tempered glass

G2 1/4-inch clear tempered glass

G3 1/4-inch clear wire glass rated 45 minutes

B. [Exterior Glazing]{.underline}: Provide Sungate 100 Solargray Low E
glass manufactured by PPG Industries as follows.

1\. Shading Coefficient: 0.40

2\. Winter nighttime U value: 0.31

3\. Summer Daytime U value: 0.34

4\. Provide laminated glass at outside layer of 1-inch glass at
storefronts.

END OF SECTION