088000 - Glazing_0004.doc

Copyright 2009 by The American Institute of Architects (AIA)

Exclusively published and distributed by Architectural Computer Services, Inc. (ARCOM) for the AIA

SECTION 088000 - GLAZING

Revise this Section by deleting and inserting text to meet Project-specific requirements.

This Section uses the term "Architect." Change this term to match that used to identify the design professional as defined in the General and Supplementary Conditions.

Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed.

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes glazing for the following products and applications, including those specified in other Sections where glazing requirements are specified by reference to this Section:

1. Windows.

2. Laminated Glazing at Reception Security Window.

B. Related Requirements:

1. Section 084113: Aluminum Framed Entrances & Storefronts.

2. Section 081416: Flush Wood Doors.

1.2 PERFORMANCE REQUIREMENTS

Retain first paragraph below if Contractor is required to assume responsibility for design. ASTM E 1300 is referenced in the 2006 International Building Code (IBC), but the 2003 IBC contains its own design requirements, which are different from those in ASTM E 1300.

A. Design Wind Pressures: As indicated on Drawings.

The IBC requires that design wind pressures used for design of exterior components and cladding not designed by the registered design professional be shown on the Construction Documents.

Retain first subparagraph below if sloped glazing is exposed to snow loads. The IBC requires that the flat-roof snow load be indicated on the Construction Documents if the ground snow load exceeds 10 lbf/sq. ft. (0.479 kN/sq. m).

If referencing ASTM E 1300, retain applicable subparagraphs from first three below, which are based on requirements in the 2006 IBC.

Subparagraph below applies primarily to tinted glass because of its heat-absorbing property. ASTM E 1300 and the IBC do not address this concern.

B. Differential Shading: Design glass to resist thermal stresses induced by differential shading within individual glass lites.

1.3 PRECONSTRUCTION TESTING

Retain this article if insulating or laminated glass is installed with glazing sealants. Adhesion and compatibility testing is essential for insulating and laminated glass and is usually done by sealant manufacturer. Tests require large number of Samples, and some tests require four weeks to complete.

A. Preconstruction Adhesion and Compatibility Testing: Test each glazing material type, tape sealant, gasket, glazing accessory, and glass-framing member for adhesion to and compatibility with elastomeric glazing sealants.

Retain subparagraph below if previous testing is acceptable.

1. Testing will not be required if data are submitted based on previous testing of current sealant products and glazing materials matching those submitted.

1.4 ACTION SUBMITTALS

A. Product Data: For each glass product and glazing material indicated.

"Laboratory Test Reports for Credit IEQ 4" Subparagraph below applies to LEED for Schools.

B. Glass Samples: For each type of glass product other than clear monolithic vision glass; 12 inches square.

C. Glazing Schedule: List glass types and thicknesses for each size opening and location. Use same designations indicated on Drawings.

Paragraph below is defined in Division 01 Section "Submittal Procedures" as a "Delegated-Design Submittal." Retain if Work of this Section is required to withstand specific design loads and design responsibilities have been delegated to Contractor or if structural data are required as another way to verify compliance with performance requirements. Professional engineer qualifications are specified in Division 01 Section "Quality Requirements."

D. Delegated-Design Submittal: For glass indicated to comply with performance requirements and design criteria, including analysis data signed and sealed by the qualified professional Government responsible for their preparation.

1.5 INFORMATIONAL SUBMITTALS

A. Preconstruction adhesion and compatibility test report.

1.6 QUALITY ASSURANCE

A. Glazing Publications: Comply with published recommendations of glass product manufacturers and organizations below, unless more stringent requirements are indicated. Refer to these publications for glazing terms not otherwise defined in this Section or in referenced standards.

Retain publications in subparagraphs below that apply to glass products specified.

1. GANA Publications: GANA's "Laminated Glazing Reference Manual" and GANA's "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."

Retain first paragraph below if applicable and if labeling is required. Not all manufacturers participate in third-party testing programs.

B. Safety Glazing Labeling: Where safety glazing labeling is indicated, permanently mark glazing with certification label of the SGCC or another certification agency acceptable to authorities having jurisdiction or the manufacturer. Label shall indicate manufacturer's name, type of glass, thickness, and safety glazing standard with which glass complies.

Retain first paragraph below if applicable and if labeling is required. Below is based on the 2006 IBC.

Delete paragraph below if no insulating glass. Not all manufacturers participate in program; refer to the IGCC directory for participants. Verify that types of units required are certified.

C. Insulating-Glass Certification Program: Permanently marked either on spacers or on at least one component lite of units with appropriate certification label of IGCC.

1.7 WARRANTY

When warranties are required, verify with Owner's counsel that special warranties stated in this article are not less than remedies available to Owner under prevailing local laws.

Paragraphs below are examples only.

A. Manufacturer's Special Warranty for Coated-Glass Products: Manufacturer's standard form in which coated-glass 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.

Verify available warranties and warranty periods with manufacturers listed in Part 2 articles. Revise subparagraph below if glass manufacturers insist on warranty beginning on date of manufacture. See Evaluations.

1. Warranty Period: 10 years from date of Substantial Completion.

B. Manufacturer's Special Warranty on Laminated Glass: Manufacturer's standard form in which 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.

Verify available warranties and warranty periods with manufacturers listed in Part 2 articles. Revise subparagraph below if glass manufacturers insist on warranty beginning on date of manufacture. See Evaluations.

1. Warranty Period: 10 years from date of Substantial Completion.

C. Manufacturer's Special Warranty on Insulating Glass: Manufacturer's standard form in which 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.

Verify available warranties and warranty periods with manufacturers listed in Part 2 articles. Revise subparagraph below if glass manufacturers insist on warranty beginning on date of manufacture. See Evaluations.

1. Warranty Period: 10 years from date of Substantial Completion.

PART 2 - PRODUCTS

2.1 GLASS PRODUCTS, GENERAL

A. Thickness: Where glass thickness is indicated, it is a minimum. Provide glass lites in thicknesses as needed to comply with requirements indicated.

B. Strength: Where float glass is indicated, provide annealed float glass, Kind HS heat-treated float glass, or Kind FT heat-treated float glass. Where heat-strengthened glass is indicated, provide Kind HS heat-treated float glass or Kind FT heat-treated float glass. Where fully tempered glass is indicated, provide Kind FT heat-treated float glass.

Retain first paragraph below if required by Project. The IBC defines wind-borne debris regions. Enhanced protection applies to essential facilities. Verify requirements of authorities having jurisdiction.

C. 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. 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.

2. 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.

3. Visible Reflectance: Center-of-glazing values, according to NFRC 300.

2.2 GLASS PRODUCTS

Retain paragraphs in this article that apply to monolithic-, laminated-, and insulating-glass types specified.

Retain first paragraph below even if plain, clear float glass is not required; other paragraphs in this article and in glass types articles depend on it for definition of "float glass."

A. Uncoated, Heat-Treated Float Glass: ASTM C 1048; Type I; Quality-Q3; Class I (clear) unless otherwise indicated; of kind and condition indicated.

B. Pyrolitic-Coated, Heat-Treated Float Glass: ASTM C 1048; Type I; Quality-Q3; Class I (clear) unless otherwise indicated; of kind and condition indicated.

C. Wire Glass: 1/4" clear float glass; Type II; Quality-Q3; Class I (clear); Form 1 (wired, polished both sides); Mesh m2 (square).

D. Mirror Glass: 1/4" clear float glass, mirror quality, with silver coating and protective electrolytic copper coating not less than 0.0002" thick plus 2 coats special mirror backing paint totalling 2.0 mils dry film thickness. Polish all exposed edges.

2.3 LAMINATED GLASS

A. Laminated Glass: ASTM C 1172. Use materials that have a proven record of no tendency to bubble, discolor, or lose physical and mechanical properties after fabrication and installation.

1. Construction: Laminate glass with to comply with interlayer manufacturer's written instructions.

2. Interlayer Thickness: Provide thickness as needed to comply with requirements.

3. Interlayer Color: Clear unless otherwise indicated.

Coating in first paragraph below is available only on clear float glass and is applied pyrolytically on the float line. Consequently, if a reflective or low-e coating is required (which would be on the second surface, which was exposed to the molten tin bath on the float line), it must be a sputtered coating.

If more than one color of tinted float glass is required, copy and re-edit first paragraph below for each color required and insert a color designation, such as "blue" or "bronze" at the beginning of the paragraph title. Use those color designations in schedules or on Drawings to identify where each color is required.

Insert performance properties in subparagraph below to suit product(s) selected.

Retain classifications for finish and pattern in first paragraph below to suit products named.

Retain classifications for finish and pattern in first paragraph below to suit products named.

If more than one color of reflective-coated vision glass is required, copy and re-edit first paragraph below for each color required and insert a color designation, such as "blue" or "bronze" at the beginning of the paragraph title. Use those color designations in schedules or on Drawings to identify where each color is required. Pyrolytic coatings may be used on either the first or the second surface of monolithic-glass lites as well as other surfaces of laminated and insulating glass. Sputtered coatings may only be used with monolithic glass if recommended by manufacturer, and then only on the second surface. Otherwise, sputtered coating must be used with either laminated or insulating glass and placed on the second or third surface. Some sputter-coated products are heat treatable after coating is applied.

If more than one color of ceramic-coated spandrel glass is required, copy and re-edit first paragraph below for each color required and insert a color designation, such as "blue" or "bronze" at the beginning of the paragraph title. Use those color designations in schedules or on Drawings to identify where each color is required.

If more than one color of silicone-coated spandrel glass is required, copy and re-edit first paragraph below for each color required and insert a color designation, such as "blue" or "bronze" at the beginning of the paragraph title. Use those color designations in schedules or on Drawings to identify where each color is required. Coating below is an elastomeric paint and is less expensive than ceramic coating. Silicone coating is typically more uneven than ceramic coating and frequently contains pin holes; however, these irregularities are generally not visible from typical viewing distances because of lack of illumination in the space behind spandrel glass. Silicone coating is more readily available in custom colors and may provide fallout resistance.

If more than one color of reflective-coated spandrel glass is required, copy and re-edit paragraph below for each color required and insert a color designation, such as "blue" or "bronze" at the beginning of the paragraph title. Use those color designations in schedules or on Drawings to identify where each color is required.

Retain paragraph below if retaining "Windborne-Debris-Impact Resistance" Paragraph in "Glass Products, General" Article.

2.4 INSULATING GLASS

A. Insulating-Glass Units: Factory-assembled units consisting of sealed lites of glass separated by a dehydrated interspace, qualified according to ASTM E 2190, and complying with other requirements specified.

1. Sealing System: Dual seal.

If retaining a specific spacer material, coordinate with manufacturers and products selected.

2. Spacer: Manufacturer's standard spacer material and construction.

2.5 GLAZING GASKETS

Gaskets in first paragraph below are for drive-in wedges or for use with pressurized stops.

A. Dense Compression Gaskets: Molded or extruded gaskets of profile and hardness required to maintain watertight seal, made from one of the following:

Retain one or more of four subparagraphs below. Neoprene is not compatible with silicone glazing sealants.

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.

Gaskets in paragraph below are for use between glass and frame (or fixed stop) where they will be compressed by inserting dense compression gaskets or by pressure-glazing stops. Neoprene is not compatible with silicone glazing sealants.

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.

2.6 GLAZING SEALANTS

A. General:

1. Compatibility: Provide glazing sealants that are compatible with one another and with other materials they will 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.

Retain first subparagraph below if required for LEED-NC, LEED-CI, or LEED-CS Credit IEQ 4.1.

3. Sealants used inside the weatherproofing system, shall have a VOC content of not more than 250 g/L when calculated according to 40 CFR 59, Subpart D (EPA Method 24).

Retain first subparagraph below if required for LEED for Schools Credit IEQ 4.

4. Sealants used inside the weatherproofing system shall comply with the testing and product requirements of the California Department of Health Services' "Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers."

5. Colors of Exposed Glazing Sealants: As selected by Government from manufacturer's full range.

Retain one or more of first four paragraphs below. If retaining more than one, retain "Applications" subparagraphs.

2.7 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 C 1281 and AAMA 800 for products indicated below:

Retain one or more back-bedding tapes from subparagraphs below. AAMA 804.3 tape is for less-severe back-bedding and drop-in residential and light-commercial glazing applications. AAMA 806.3 tape is for high-performance commercial glazing applications involving continuous pressure from gaskets or pressure-generating stop designs. AAMA 807.3 tape is for commercial glazing applications not involving continuous pressure from gaskets and stop designs.

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.

2.8 MISCELLANEOUS GLAZING MATERIALS

A. Cleaners, Primers, and Sealers: Types recommended by sealant or gasket manufacturer.

B. Setting Blocks: Elastomeric material with a Shore, Type A durometer hardness of 85, plus or minus 5.

C. Spacers: Elastomeric blocks or continuous extrusions of hardness required by glass manufacturer to maintain glass lites in place for installation indicated.

D. Edge Blocks: Elastomeric material of hardness needed to limit glass lateral movement (side walking).

Retain first paragraph below if applicable for glazing channels.

Revise five articles below to suit Project. Retain requirements in "Glass Products" Article that reference glass standards, but do not duplicate requirements retained in that article.

Copy paragraphs in the five articles if needed and re-edit them to suit Project.

Insert number to complete drawing designations. Use these designations on Drawings to show where each glass type is required.

2.9 MONOLITHIC-GLASS TYPES

If thicknesses for each type of monolithic-glass unit are specified in this article, insert or retain thickness designations in millimeters per ASTM C 1036. If thickness designations are indicated on Drawings or are determined solely on compliance with "Performance Requirements" Article, delete "Thickness" subparagraphs.

A. Clear, fully tempered float glass, wired where indicated on the Drawings.

1. Thickness: 6.0 mm.

Retain subparagraph below if required for fully tempered glass.

2. Provide safety glazing labeling.

2.10 INSULATING-GLASS TYPES

A. Low-e-coated, clear insulating glass.

1. Overall Unit Thickness: As required to fit assembly. Refer to Section 081113: Hollow Metal Doors and Frames; Section 083613: Sectional Doors.

2. Thickness of Each Glass Lite: 6.0 mm.

3. Outdoor Lite: Fully tempered float glass.

4. Interspace Content: Air.

5. Indoor Lite: Fully tempered float glass.

6. Low-E Coating: Pyrolytic on second surface.

7. Visible Light Transmittance: 70 percent minimum.

8. Winter Nighttime U-Factor: 0.29 maximum.

9. Summer Daytime U-Factor: 0.27 maximum.

10. Solar Heat Gain Coefficient: 0.38 maximum.

Retain subparagraph below if required for fully tempered glass.

11. Provide safety glazing labeling.

PART 3 - EXECUTION

3.1 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. Adjust glazing channel dimensions as required by Project conditions during installation to provide necessary bite on glass, minimum edge and face clearances, and adequate sealant thicknesses, with reasonable tolerances.

C. Protect glass edges from damage during handling and installation. Remove damaged glass from Project site and legally dispose of off Project site. Damaged glass is glass with edge damage or other imperfections that, when installed, could weaken glass and impair performance and appearance.

D. Apply primers to joint surfaces where required for adhesion of sealants, as determined by preconstruction testing.

E. 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.

F. Do not exceed edge pressures stipulated by glass manufacturers for installing glass lites.

G. Provide spacers for glass lites where length plus width is larger than 50 inches.

H. 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.

3.2 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 and then to jambs. Cover horizontal framing joints by applying tapes to jambs and 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.

Delete first paragraph below if not required, or qualify by adding "where indicated" and show locations on Drawings.

E. Apply heel bead of elastomeric sealant.

F. 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.

Delete paragraph below if not applicable or revise; it assumes fixed stop is located on exterior.

G. Apply cap bead of elastomeric sealant over exposed edge of tape.

3.3 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 weathertight 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 weathertight 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.

3.4 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.

3.5 SECURITY WINDOW

A. Fabricate and install security window at reception counter so as to provide 6 inches of clearance between the bottom of the window frame and the top of the reception counter. Frame with aluminum extrusions to match the main entry, capturing laminated glazing on top, bottom and all sides of each glazing panel. Secure in framing using gasket or tape glazing. Top of security glazing assembly to be not less than 60 inches from top of reception counter, or terminate at true ceiling, whichever is lower. Space glazing panels evenly sized sections for each face of the assembly, with no panel spanning more than 36 inches. Top rail of window assembly shall be continuous end-to-end, and vertical elements shall be continuous from top rail to point of bottom attachment. Extend vertical framing between each glazed panel to the top of the reception counter and secure. Secure framing to counter top (or below counter to floor, if required) and to walls in a manner that will provide secure bracing against a 300 pound lateral force imposed at any point in or on the assembly.

3.6 CLEANING AND PROTECTION

A. Protect exterior glass from damage immediately after installation by attaching crossed streamers to framing held away from glass. Do not apply markers to glass surface. Remove nonpermanent labels and clean surfaces.

B. Protect glass from contact with contaminating substances resulting from construction operations. If, despite such protection, contaminating substances do come into contact with glass, remove substances immediately as recommended in writing by glass manufacturer.

C. 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; remove as recommended in writing by glass manufacturer.

D. Remove and replace glass that is broken, chipped, cracked, or abraded or that is damaged from natural causes, accidents, and vandalism, during construction period.

3.7 MONOLITHIC GLASS SCHEDULE

Monolithic glass refers to glass that is made in a single sheet without being laminated.

Copy paragraphs below and re-edit for each type of glass required.

Insert drawing designation. Use these designations on Drawings to identify each glass type.

If thickness designations are indicated on Drawings or are determined solely by compliance with "Performance Requirements" Article, delete "Minimum Thickness" subparagraphs.

A. Glass Type GL-1: Clear annealed, heat-strengthened, or fully tempered float glass as indicated.

1. Minimum Thickness: 6 mm.

Retain subparagraph below if required; "fully tempered" option must be retained in paragraph above if safety glazing is required.

2. Safety glazing where required.

B. Glass Type GL-2: Ultraclear annealed, heat-strengthened, or fully tempered float glass.

Retain "Basis-of-Design Product" Subparagraph below to require a specific product or a comparable product from manufacturers listed in "Manufacturers" Article.

1. Basis-of-Design Product: PPG Industries, Inc.; Starphire.

2. Minimum Thickness: 6 mm.

Retain subparagraph below if required; "fully tempered" option must be retained in paragraph above if safety glazing is required.

3. Safety glazing where required

3.8 LAMINATED GLASS SCHEDULE

Copy paragraphs below and re-edit for each product.

Insert drawing designation. Use these designations on Drawings to identify each product.

If thickness designations are indicated on Drawings or are determined solely by compliance with "Performance Requirements" Article, delete "Minimum Thickness of Each Glass Ply" subparagraphs below.

A. Clear Laminated Glass Type: Two plies of ultraclear fully tempered float glass.

Retain "Basis-of-Design Product" Subparagraph below to require a specific product.

1. Minimum Thickness of Each Glass Ply: 6 mm

2. Interlayer Thickness: 0.060 inch.

3. Safety glazing required.

Not all sputtered-coating colors are suitable for monolithic applications and must be on second surface.

Not all sputtered-coating colors are suitable for monolithic applications and must be on second surface.

Samples for verification or mockups should be used for laminated glass that has the coating facing the plastic interlayer due to potential color shift.

Samples for verification or mockups should be used for laminated glass that has the coating facing the plastic interlayer due to potential color shift.

Samples for verification or mockups should be used for laminated glass that has the coating facing the plastic interlayer due to potential color shift.

Samples for verification or mockups should be used for laminated glass that has the coating facing the plastic interlayer due to potential color shift.

3.9 INSULATING GLASS SCHEDULE

Copy paragraphs below and re-edit for each type of glass required.

Insert drawing designation. Use these designations on Drawings to identify each glass type.

If thickness designations are indicated on Drawings or are determined solely by compliance with "Performance Requirements" Article, delete "Minimum Thickness of Each Glass Lite" subparagraphs.

A. Glass Type GL-3: Low-E Coated ultraclear insulating glass.

Retain "Basis-of-Design Product" Subparagraph below to require a specific product or a comparable product from manufacturers listed in "Manufacturers" Article.

1. Basis-of-Design Product: Solarban 70 XL, as manufactured by PPG.

2. Overall Unit Thickness: 1 inch + thickness required for laminated glass.

3. Minimum Thickness of Each Glass Lite: 6 mm, except where laminated glass specifications make other requirements.

4. Outdoor Lite: Ultraclear annealed, heat-strengthened, or fully tempered float glass, as required.

5. Low-E coating on manufacturer’s standard surface.

6. Interspace Content: Air.

7. Indoor Lite: Annealed, heat-strengthened, or fully tempered float glass.

Insert performance properties, if required, in "Winter Nighttime U-Factor" and "Summer Daytime U-Factor" subparagraphs below to suit product(s).

8. Winter Nighttime U-Factor: .29 maximum.

9. Summer Daytime U-Factor: .26 maximum.

10. Visible Light Transmittance: 62% minimum.

11. Solar Heat Gain Coefficient: .29 maximum.

Retain subparagraph below if required; "fully tempered" option must be retained in "Outdoor Lite" and Indoor Lite" subparagraphs if safety glazing is required.

12. Safety glazing as required.

END OF SECTION 088000

MARCH 2021-ADDENDUM #01

GLAZING

LITTLE SAHARA VISITOR CENTER REPLACEMENT

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