08_44_13_-_Glazed_Aluminum_Curtainwalls.pdf

ORANGE COUNTY 2023.10.06

PUBLIC WORKS ADMINISTRATION BUILDING SPECIFICATIONS

GLAZED ALUMINUM CURTAINWALLS 08 44 13 - 1

SECTION 08 44 13: GLAZED ALUMINUM CURTAINWALLS

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. This Section covers architectural aluminum curtain wall systems, including perimeter trims, stools, break metal soffits, break metal trim to storefront head below, accessories, shims and anchors, and perimeter sealing of curtain wall framing.

B. Related Sections:

1. 074244: Composite Insulated Metal Window Panels

2. 079200: Joint Sealants

3. 084113: Aluminum-Framed Entrances

4. 088000: Glazing

5. Other minor related sections

C. Note all pressures on the all drawings, architectural, structural or otherwise as well as specifications. All systems must meet the pressures indicated tested within the system, within the wall system, as a whole, not individually. If systems do not meet as expected notify the design team immediately during bidding.

1.3 DEFINITIONS

A. For fenestration industry standard terminology and definitions, refer to the American

Architectural Manufacturers Association Glossary (AAMA AG-13).

1.4 PERFORMANCE REQUIREMENTS

A. General Performance:

1. Product to comply with the specified performance requirements without failure due to defective manufacture, fabrication, installation, or other defects in construction, as determined by testing of glazed aluminum curtain walls representing those indicated for

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this project. The Florida Building Code, Seventh Edition shall supersede all performance requirements where code requirements are more stringent.

2. Glazed aluminum curtain walls shall withstand movements of supporting structure including, but not limited to, story drift, twist, column shortening, long-term creep, and deflection from uniformly distributed and concentrated live loads.

3. Failure includes any of these events:

a. Thermal stresses transferring to building structure

b. Glass breakage

c. Loosening or weakening of fasteners, attachments, and other components

d. Failure of operating units

B. Delegated Design:

1. Design glazed aluminum curtain walls, including comprehensive engineering analysis by a qualified Florida registered professional engineer, using performance requirements and design criteria indicated.

C. Wind Loads:

1. The curtain wall system shall include anchorage that is capable of withstanding the wind load design pressures in the structural drawings and as dictated by the Florida Product

Approval.

2. The design pressures are based in the Florida Building Code, Seventh Edition. See

Structural drawings for a wind load criteria and diagram for this project.

D. Air Leakage:

1. The test specimen shall be tested in accordance with ASTM E 283.

2. Air infiltration rate shall not exceed 0.06 cfm/ft2 (0.3 l/s · m2) at a static air pressure differential of 6.2 psf (300 Pa).

E. Water Resistance:

1. Static:

a. The test specimen shall be tested in accordance with ASTM E 331.

b. There shall be no leakage at a minimum static air pressure differential of 12 psf (575

Pa) as defined in AAMA 501.

2. Dynamic:

a. The test specimen shall be tested in accordance with AAMA 501.1.

b. There shall be no leakage at an air pressure differential of 12 psf (575 Pa) as defined in AAMA 501.

F. Uniform Load:

1. A static air design load of 40 psf (1915 Pa) shall be applied in the positive and negative direction in accordance with ASTM E 330.

2. There shall be no deflection in excess of L/175 of the span of any framing member at design load.

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3. At a structural test load equal to 1.5 times the specified design load, no glass breakage or permanent set in the framing members in excess of 0.2% of their clear spans shall occur.

G. Seismic:

1. When tested to AAMA 501.4, system must meet design displacement (elastic) of 0.010 x the story height and ultimate displacement (inelastic) of 1.5 x the design displacement.

H. Thermal Transmittance (U-factor), Physical Test:

1. Thermal transmittance test results in accordance with AAMA 1503 or CSA A440 are based upon 1" (25.4 mm) clear insulating glass (1/4", 1/2" AS, 1/4").

2. Per Florida Building Code –the thermal transmittance (U-factor) shall not be more than

0.50 Btu/hr/(hr·ft2·°F) at fixed locations.

I. Condensation Resistance Factor (CRF) or Temperature Index (TI):

1. Condensation resistance test results in accordance with AAMA 1503 or CSA A440 are based upon 1" (25.4 mm) clear insulating glass (1/4", 1/2" AS, 1/4").

2. If using CRF: When tested using AAMA 1503, the CRFframe and CRFglass shall not be less than 66 and 60 respectively.

3. If using TI: When tested to CSA A440-00, the TIframe and TIglass shall not be less than 68 and 54 respectively.

J. Condensation Resistance Factor (CRF) or Temperature Index (TI):

1. Condensation resistance test results in accordance with AAMA 1503 or CSA A440 are based upon 1" (25.4 mm) clear low emissivity coated insulating glass, (1/4" e=0.035, #2), 1/2" warm edge spacer and argon fill gas, 1/4").

2. When tested using AAMA 1503, the CRFframe and CRFglass (with low-emissivity glazing) shall not be less than 71 and 71 respectively.

K. Sound Transmission Loss:

1. When tested to ASTM E90 and ASTM E1425, the Sound Transmission Class (STC) and

Outdoor/Indoor Transmission Class (OITC) shall not be less than:

a. STC 31 or OITC 26 based upon 1" (25.4 mm) insulating glass (1/4", 1/2" AS, 1/4")

L. Windborne-Debris-Impact Resistance Performance: Cat 4 Hurricane Impact, Small and Large

Missile. See Structural for pressures.

M. Blast Mitigation Performance: Cat 4 Hurricane Impact

N. Environmental Product Declaration (EPD): Shall have a Type III Product-Specific EPD created from a Product Category Rule.

O. Material Ingredient Reporting:

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1. Shall have a complete list of chemical ingredients to at least 100 ppm (0.01%) that covers

100% of the product.

2. Acceptable documentation includes:

a. Manufacturer's inventory with Chemical Abstract Service Registration Number

(CASRN or CAS#):

1) YKK’s Material Transparency Summary (MTS)

b. Cradle to Cradle certification; either document listed below is acceptable for this option:

1) Cradle to Cradle Certified™ with Material Health section Silver or higher

2) Silver Level or higher Material Health Certificate

c. Red List Free DECLARE label

1.5 SUBMITTALS

A. Product Data:

1. For each type of product indicated, include:

a. Construction details

b. Material descriptions

c. Dimensions of individual components and profiles

d. Finishes

2. Recycled Content:

a. Provide documentation that aluminum has a minimum of 50% mixed pre- and post-consumer recycled content.

b. Provide a sample document illustrating project-specific information that will be provided after product shipment.

c. After product has shipped, provide project-specific recycled content information:

1) Indicate recycled content, including the percentage of pre- and post-consumer recycled content per unit of product.

2) Indicate the relative dollar value of recycled content product to the total dollar value of product included in the project.

3) Indicate the location for recovery of recycled content.

4) Indicate the location of the manufacturing facility.

3. Environmental Product Declaration (EPD):

a. Include a Type III Product-Specific EPD created from a Product Category Rule.

4. Material Ingredient Reporting:

a. Include documentation for material reporting that has a complete list of chemical ingredients to at least 100ppm (0.01%) that covers 100% of the product.

B. Shop Drawings:

1. Plans

2. Elevations

3. Sections

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4. Full-size details

5. Attachments to other work

C. Samples for Initial Selection: Not Required – Selection has been determined

D. Samples for Verification:

1. Provide a verification sample for each type of exposed finish required, in manufacturer's standard sizes.

E. Product Test Reports:

1. Provide test reports for glazed aluminum curtain walls.

2. Test reports must be based on evaluation of comprehensive tests performed by a qualified preconstruction testing agency.

3. Test reports must indicate compliance with performance requirements.

F. Fabrication Sample:

1. Provide a fabrication sample of each vertical-to-horizontal intersection of aluminum-framed curtain wall systems, made from 12" (304.8 mm) lengths of full-size components and showing details of the following:

a. Joinery

b. Glazing

1.6 QUALITY ASSURANCE

A. Installer Qualifications:

1. Installer must have successfully installed the same or similar systems required for the project and other projects of similar size and scope.

B. Manufacturer Qualifications:

1. Manufacturer must be capable of fabricating glazed aluminum curtain walls that meet or exceed the stated performance requirements.

C. Source Limitations:

1. Obtain aluminum curtain wall system through one source from a single manufacturer.

D. Product Options:

1. Information on drawings and in specifications establishes requirements for aesthetic effects and performance characteristics of assemblies. Aesthetic effects are indicated by dimensions, arrangements, alignment, and profiles of components and assemblies as they relate to sightlines, to one another, and to adjoining construction.

2. Do not modify intended aesthetic effects, as judged solely by Architect, except with

Architect's approval. If modifications are proposed, submit comprehensive explanatory data to Architect for review.

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E. Mockups:

1. Build mockups to verify selections made under sample submittals and to demonstrate aesthetic effects and set quality standards for materials and execution.

2. Build mockups for the type(s) of curtain wall elevation(s) indicated, in location(s) shown on drawings. If not identified on the drawings, the west facing section of curtainwall located in an offset in the building approximately 80 feet west of the main entrance shall be the section of wall constructed as a mockup. Mockup shall be reviewied by the Owner and Architect during the construction of the mockup and shall be water tested at completion of the install. The completed and tested curtainwall assembly shall be the basis of acceptance for the remaining work.

3. Construction workers building the mockups shall be the same workers performing the work require by this project.

F. Pre-installation Conference:

1. Conduct conference at project site to comply with requirements in Division 01 Project

Management and Coordination Section.

1.7 PROJECT CONDITIONS

A. Field Measurements:

1. Verify actual locations of structural supports for glazed aluminum curtain walls by field measurements before fabrication.

2. Indicate measurements on shop drawings.

1.8 WARRANTY

A. Glazed Curtain Wall Warranty: Submit a written no dollar limit warranty, edge to edge, executed by curtain wall manufacturer, agreeing to repair or replace units that fail in materials or workmanship within the specified warranty period. Failures include but are not necessarily limited to:

1. Failures include, but are not limited to, the following:

a. Structural failures including, but not limited to, excessive deflection.

b. Noise or vibration caused by thermal movements.

c. Deterioration of metals, metal finishes, and other materials beyond normal weathering.

d. Water leakage.

e. Failure of operating components to function normally.

2. Warranty Period: 10 years after the date of Final Completion.

3. This warranty shall not deprive the Owner of other rights that the Owner may have under other provisions of the Contract Documents and runs concurrent with other warranties.

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B. Special Finish Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components on which finishes fail within specified warranty period. Warranty does not include normal weathering.

1. Warranty Period: 20 years from date of Final Completion.

C. Special Installer's Warranty: Manufacturer's standard form in which Installer agrees to repair or replace joint sealants that do not comply with performance and other requirements specified in this

Section within specified warranty period.

1. Warranty Period: 20 years from date of date of final completion.

D. Special Manufacturer's Warranty: Manufacturer's standard form in which joint-sealant manufacturer agrees to furnish joint sealants to repair or replace those that do not comply with performance and other requirements specified in this Section within specified warranty period.

1. Warranty Period: 20 years for sealants and caulks from date of final completion

E. Special warranties specified in this article exclude deterioration or failure of joint sealants from the following:

1. Movement of the structure caused by structural settlement or errors attributable to design or construction resulting in stresses on the sealant exceeding sealant manufacturer's written specifications for sealant elongation and compression.

2. Disintegration of joint substrates from natural causes exceeding design specifications.

3. Mechanical damage caused by individuals, tools, or other outside agents.

4. Changes in sealant appearance caused by accumulation of dirt or other atmospheric contaminants.

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Basis-of-Design Product:

1. YKK AP America

2. YHC 300 OG - Hurricane Impact and Blast Mitigating Curtain Wall:

1) Outside-glazed pressure plate format

2) System depth: 7 11/16" (195.262 mm) for 1 5/16" (33.3375 mm) insulating glazing.

3) Spans must be reinforced as required to resist wind loads .

B. Subject to compliance with requirements, provide a comparable product by the following:

1. Manufacturer Basis-of-Design : YKK

2. TGP America

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3. Vistawall

2.2 MATERIALS

A. Aluminum Extrusions:

1. Alloy and temper recommended by glazed aluminum curtain wall manufacturer for strength, corrosion resistance, and application of required finish

2. Not less than 0.070" (1.8 mm) wall thickness at any location for the main frame

3. Complying with ASTM B221: 6063-T6 alloy and temper

4. Recycled Content:

a. Shall have a minimum of 50% mixed pre- and post-consumer recycled content.

b. Indicate recycled content, including the percentage of pre- and post-consumer recycled content per unit of product.

c. Indicate the relative dollar value of recycled content product to the total dollar value of product included in the project.

d. Indicate the location for recovery of recycled content.

e. Indicate the location of the manufacturing facility.

B. Aluminum Sheet Alloy:

1. Shall meet the requirements of ASTM B209.

C. Fasteners:

1. Aluminum, nonmagnetic stainless steel or other materials must be non-corrosive and compatible with aluminum members, trim hardware, anchors, and other components.

D. Anchors, Clips, and Accessories:

1. Aluminum, nonmagnetic stainless steel, or zinc-coated steel or iron complying with

ASTM B 633 for SC 3 severe service conditions or other suitable zinc coating.

2. Anchors, clips, and accessories shall provide sufficient strength to withstand the design pressure indicated.

E. Pressure Plate:

1. Pressure plate shall be aluminum.

2. Pressure plate shall be fastened to the mullion with stainless steel screws.

F. Reinforcing Members:

1. Aluminum, nonmagnetic stainless steel, or nickel/chrome-plated steel complying with

ASTM B 456 for Type SC 3 severe service conditions, or zinc-coated steel or iron complying with ASTM B 633 for SC 3 severe service conditions or other suitable zinc coating.

2. Reinforcing members must provide sufficient strength for the span of the system to withstand the design pressure indicated.

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G. Sealant:

1. For sealants required within fabricated curtain wall system, provide permanently elastic, non-shrinking, and non-migrating type recommended by sealant manufacturer for joint size and movement.

2. For sealants required to seal the curtainwall at the perimeter refer to Joint Sealants spec 07

92 00.

3. Work under this section shall include ALL work to provide a watertight installation of the complete curtainwall system and its connection to the building structure.

H. Thermal Barrier:

1. Thermal separator shall be extruded of a silicone compatible elastomer that provides a minimum 1/4" (6.3 mm) separation.

I. Tolerances:

1. References to tolerances for wall thickness and other cross-sectional dimensions of glazed curtain wall members are nominal and in compliance with AA Aluminum Standards and

Data.

J. Red List Free:

1. All parts and materials comply with the Living Building Challenge/DECLARE Red List and the Cradle-to-Cradle (C2C) Banned List:

a. PVC-free

b. Neoprene-free

2. Product does not contain PVC or Neoprene.

2.3 CURTAIN WALL FRAMING

A. Framing Members:

1. Manufacturer's standard extruded- or formed-aluminum framing members of thickness required and reinforced as required to support imposed loads

2. Glazing System: Four-sided captured

3. Glazing Plane: Front

B. Glass:

1. Insulating glass options:

a. 1 5/16" (33.3375 mm) - Double Laminated glazing

C. Brackets and Reinforcements:

1. Manufacturer's standard high-strength aluminum with non-staining, non-ferrous shims for aligning system components.

D. Framing Sealants:

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1. Shall be suitable for glazed aluminum curtain wall as recommended by sealant manufacturer.

E. Fasteners and Accessories:

1. Manufacturer's standard corrosion-resistant, non-staining, non-bleeding fasteners and accessories must be compatible with adjacent materials.

2. Where exposed, fasteners and accessories shall be stainless steel.

F. Perimeter Anchors:

1. When steel anchors are used, provide insulation between steel material and aluminum material to prevent galvanic action.

G. Packing, Shipping, Handling, and Unloading:

1. Deliver materials in manufacturer's original, unopened, undamaged containers with identification labels intact.

H. Storage and Protection:

1. Store materials so that they are protected from exposure to harmful weather conditions.

2. Handle material and components to avoid damage.

3. Protect material against damage from elements, construction activities, and other hazards before, during, and after installation.

2.4 GLAZING

A. Glazing to meet requirements in Division 08 Glazing Section.

B. Available Glazing Options:

1. YHC 300 OG - Hurricane Impact and Blast Mitigating Curtain Wall:

a. System depth: 7 11/16" (190.5 mm) for 1 5/16" (33.3375 mm) insulating glazing

C. Glazing Gaskets:

1. Gaskets to meet requirements of ASTM C864.

D. Spacers and Setting Blocks:

1. Manufacturer's standard elastomeric type

E. Bond-Breaker Tape:

1. Manufacturer's standard TFE-fluorocarbon or polyethylene material to which sealants will not develop adhesion.

F. Glazing Sealants:

1. As recommended by manufacturer for joint type.

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2.5 ACCESSORY MATERIALS

A. Bituminous Paint:

1. Cold-applied asphalt-mastic paint

2. Complies with SSPC-Paint 12 requirements except containing no asbestos

3. Formulated for 30-mil (0.762 mm) thickness per coat

2.6 FABRICATION

A. Extrude or form aluminum shapes before finishing. This includes but not limited to all panning, trims, soffit panels, etc indicated on the drawings. Finish to match curtainwall.

B. Fabricate components that, when assembled, have the following characteristics:

1. Profiles that are sharp, straight, and free of defects or deformations

2. Accurately fitted joints

3. Physical and thermal isolation of glazing from framing members

4. Accommodations for thermal and mechanical movements of glazing and framing that maintain required glazing edge clearances

5. Provisions for field replacement of glazing from exterior

6. Fasteners, anchors, and connection devices that are concealed from view to the greatest extent possible

7. Internal weeping system or other means to drain water passing joints, condensation occurring within framing members, and moisture migrating within glazed aluminum curtain wall to exterior

C. Curtain Wall Framing:

1. Fabricate components for assembly using shear block system following manufacturer's standard installation instructions.

D. After fabrication, clearly mark components to identify their locations in project according to shop drawings.

2.7 ALUMINUM FINISHES

A. Finish designations that are prefixed by AA comply with the system established by the

Aluminum Association for designating aluminum finishes.

B. Factory Finishing:

1. YKK AP standard anodized finish : Anodized Plus - *YK1N – Black

a. Applicator shall provide any additional preparation, color confirmation and testing and following application procedures required to provide the finish warranty indicated.

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PART 3 EXECUTION

3.1 EXAMINATION

A. With installer present, examine areas for compliance with requirements for installation tolerances and other conditions affecting performance of the work.

B. Proceed with installation only after correcting unsatisfactory conditions.

3.2 INSTALLATION

A. Curtain Wall System Installation:

1. Install curtain wall systems plumb, level, and true to line, without warp or rack of frames, within manufacturer’s prescribed tolerances, and complying with installation instructions.

2. Provide support and anchor in place.

3. Dissimilar Materials:

a. Provide separation of aluminum materials from sources of corrosion or electrolytic action contact points.

4. Glazing:

a. Glass shall be outside glazed.

b. Glass shall be held in place with extruded aluminum pressure plates anchored to the mullion using stainless steel fasteners that are spaced no more than 9" (228.6 mm) on center.

5. Water Drainage

a. Each light of glass shall be compartmentalized using joint plugs and silicone sealant to divert water to the horizontal weep locations.

b. Weep holes shall be located in the horizontal pressure plates and covers to divert water to the exterior of the building.

c. Installer assume responsibility for providing a water – tight installation.

B. Related Products Installation:

1. Sealants (Perimeter):

a. Refer to Joint Treatment (Sealants) Section.

2. Glass:

a. Refer to Glass and Glazing Section.

b. Reference: ANSI Z97.1, CPSC 16 CFR 1201, and GANA Glazing Manual.

3.3 FIELD QUALITY CONTROL

A. Field Tests:

1. The entire curtain wall shall be tested for water intrusion prior to substantial completion.

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2. Conduct tests for water penetration with manufacturer’s representative present until the representative is assured that the testing process meets the requirements.

3. Tests that do not meet the specified performance requirements and units that have deficiencies shall be corrected as part of the contract amount.

4. Testing shall be performed per AAMA 503 by a qualified independent testing agency.

Refer to Testing Section for payment of testing and testing requirements.

5. Air Infiltration Tests:

a. Conduct tests in accordance with ASTM E 783.

b. Allowable air infiltration shall not exceed 1.5 times the amount indicated in the performance requirements or 0.09 cfm/ft2, whichever is greater.

c. Only mockup shall be tested. If mockup fails, repairs shall be made until mockup passes. Owner may request second test in another area of the curtainwall if the mockup fails initially.

6. Water Infiltration Tests:

a. Conduct tests in accordance with ASTM E 1105.

b. No uncontrolled water leakage is permitted when tested at a static test pressure of two-thirds the specified water penetration pressure but not less than indicated earlier in this specification. The entire curtainwall area shall be tested.

B. Manufacturer's Field Services:

1. Upon owner’s written request, provide periodic site visit by manufacturer’s field service representative.

3.4 ADJUSTING, CLEANING, AND PROTECTION

A. Adjusting: Not applicable.

B. Protection:

1. Protect installed product’s finish surfaces from damage during construction.

2. Protect aluminum curtain wall system from damage from grinding and polishing compounds, plaster, lime, acid, cement, or other harmful contaminants.

C. Cleaning:

1. Repair or replace damaged installed products.

2. Clean installed products in accordance with manufacturer’s instructions prior to owner’s acceptance.

3. Remove and replace glass that has been broken, chipped, cracked, abraded, or damaged during the construction period.

4. Remove construction debris from project site and legally dispose of debris.

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3.5 POST CONSTRUCTION REQUIREMENTS:

Within a period of three (3) to six (6) months after the final completion, an infrared scan of the curtainwall system must be performed by a third party vendor not affiliated with the contractor and the results transmitted to the owner. The scan and results report shall meet the documentation requirements of the Infraspection Institute for infrared façade inspection.

END OF SECTION