Csi masterformat section title glazed unitized aluminum curtain walls

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A. Section Includes: Glazed Unitized Aluminum Curtain Walls:

1. YKK AP Series YCU 750 TU Unitized Aluminum Curtain Wall System

B. Related Sections:

1. Sealants: Refer to Division 7 Joint Treatment Section for sealant requirements.

2. Glass and Glazing: Refer to Division 8 Glass and Glazing Section for glass and glazing requirements.

3. Single Source Requirement: All products listed below shall be by the same manufacturer.

a. Section 08 32 13 Sliding Aluminum-Framed Glass Doors.

b. Section 08 41 13 Aluminum-Framed Entrances and Storefronts.

c. Section 08 51 13 Aluminum Windows.

d. Section 08 44 33 Sloped Glazing Assemblies.


A. Performance Requirements: Provide aluminum curtain wall systems that comply with performance requirements

indicated, as demonstrated by testing manufacturer’s assemblies in accordance with test method indicated.

1. Wind Loads: Completed curtain wall system shall withstand wind pressure loads normal to wall plane indicated:

a. Exterior Walls:

1) Positive Pressure:

2) Negative Pressure:

b. Interior Walls (Pressure Acting in Either Direction):

2. Deflection: Maximum allowable deflection in any member when tested in accordance with ASTM E 330 with allowable stress in accordance with AA Specifications for Aluminum Structures.

a. For spans less than 13’-6” (4.1m): L/175 or 3/4” (19.1mm) maximum. .

b. For spans greater than 13’-6” (4.1m) but less than 40’-0” (12.2m): L/175 or L/240 + 1/4” (6.4mm).

3. Thermal Movement: Provide for thermal movement caused by 180 degrees F. (82.2 degrees C.) surface temperature, without causing buckling stresses on glass, joint seal failure, undue stress on structural elements, damaging loads on fasteners, reduction of performance, or detrimental effects.

4. Air Infiltration: Completed curtain wall systems shall have 0.06 CFM/FT² (1.10 m³/h·m²) maximum allowable

infiltration when tested in accordance with ASTM E 283 at differential static pressure of 6.24 PSF (299 Pa).

5. Water Infiltration:

a. No uncontrolled water on indoor face of any component when tested in accordance with ASTM E 331 at a static pressure of 20 PSF (957 Pa).

b. No uncontrolled water on indoor face of any component when tested in accordance with AAMA 501.1 at a

dynamic pressure of 20 PSF (957 Pa).

6. Thermal Performance for YCU 750 TU when tested in accordance with AAMA 1503.1 and NFRC 102:

a. Condensation Resistance Factor (CRFf): A minimum of 71.

b. Thermal Transmittance U Value: 0.42 BTU/HR/FT²/ºF or less.

Note: Performance based on lab testing and will vary by glass type; see actual test reports.

7. Optional Incidental Water Management: Head member shall be capable of directing condensation from the wall

cavity above the curtain wall to the exterior of the system.

8. Acoustical Performance: When tested in accordance with ASTM E 1425:

a. Sound Transmission Class (STC) shall not be less than 37.

b. Outdoor–Indoor Transmission Class (OITC) shall not be less than 30.

9. Seismic Movement: When tested in accordance with AAMA 501.4:

a. Inter-story Differential Lateral Movement Test: Passed with design displacement of 0.010 times the story height

and meets the performance criteria for a Highest Occupancy Assembly (Group III in NEHRP Provisions).

b. Seismic Movement Test: Passed at 1.5 times design displacement.

Note: Performance based on lab testing and will vary by glass type; see actual test reports.


A. General: Prepare, review, approve, and submit specified submittals in accordance with “Conditions of the Contract” and Division 1 Submittals Sections. Product data, shop drawings, samples, and similar submittals are defined in “Conditions

of the Contract.”

B. Product Data: Submit product data for each type curtain wall series specified.

C. Substitutions: Whenever substitute products are to be considered, supporting technical data, samples and test reports

must be submitted ten (10) working days prior to bid date in order to make a valid comparison.

  1. Shop Drawings: Submit shop drawings showing layout, profiles, and product components, including anchorage,

accessories, finish colors and textures.

E. Samples: Submit verification samples for colors on actual aluminum substrates indicating full color range

expected in installed system.

F. Quality Assurance / Control Submittals:

1. Test Reports: Submit certified test reports showing compliance with specified performance characteristics and

physical properties.

2. Installer Qualification Data: Submit installer qualification data.

G. Closeout Submittals:

1. Warranty: Submit warranty documents specified herein.

2. Project Record Documents: Submit project record documents for installed materials in accordance with Division 1 Project Closeout (Project Record Documents) Section.


A. Qualifications:

1. Installer Qualifications: Installer experienced (as determined by contractor) to perform work of this section who has specialized in the installation of work similar to that required for this project. If requested by Owner, submit reference list of completed projects.

2. Manufacturer Qualifications: Manufacturer capable of providing field service representation during

construction process.

B. Mock-Ups (Field Constructed): Install at project site a job mock-up using acceptable products and manufacturer approved installation methods. Obtain Owner’s and Architect’s acceptance of finish color, and workmanship standard.

1. Mock-Up Size:

2. Maintenance: Maintain mock-up during construction for workmanship comparison; remove and legally dispose of mock-up when no longer required.

3. Incorporation: Mock-up may be incorporated into final construction upon Owner’s approval.

C. Pre-Installation Meetings: Conduct pre-installation meeting to verify project requirements, substrate conditions,

manufacturer’s installation instructions, and manufacturer’s warranty requirements.


A. Field Measurements: Verify actual measurements/openings by field measurements before fabrication; show recorded measurements on shop drawings. Coordinate field measurements, fabrication schedule with construction progress to

avoid construction delays.

A. Project Warranty: Refer to "Conditions of the Contract" for project warranty provisions.

B. Manufacturer's Warranty: Submit, for Owner's acceptance, manufacturer's standard warranty document executed by an authorized company official.

1. Warranty Period: Manufacturer’s one (1) year standard warranty commencing on the substantial date of completion for the project provided that the warranty, in no event, shall start later than six (6) months from the date of shipment by YKK AP America Inc.

EDITOR NOTE: Longer warranty periods are available at additional cost.

2.01 MANUFACTURERS (Acceptable Manufacturers/Products)

A. Acceptable Manufacturers: YKK AP America Inc.

270 Riverside Parkway, Suite A

Telephone: (678) 838-6000; Fax: (678) 838-6001

1. Curtain Wall System: YKK AP YCU 750 TU Aluminum Unitized Curtain Wall System.

B. Curtain Wall Framing System:

1. Description: Framing shall be thermally broken. Horizontal and vertical framing members shall have a nominal face dimension of 3 inches. Depth as indicated on drawings.


A. Extrusions: ASTM B 221 (ASTM B 221M), 6063-T5 and 6063-T6 Aluminum Alloys.

B. Aluminum Sheet:

1. Anodized Finish: ASTM B 209 (ASTM B 209M), 5005-H14 Aluminum Alloy, 0.050” (1.27 mm)

minimum thickness.

2. Painted Finish: ASTM B 209 (ASTM B 209M), 3003-H14 Aluminum Alloy, 0.080” (1.95 mm)

minimum thickness.

A. Manufacturer’s Standard Accessories:

1. Fasteners: Zinc plated steel concealed fasteners; Hardened aluminum alloys or AISI 300 series stainless steel exposed fasteners, countersunk, finish to match aluminum color.

2. Sealant: Non-skinning type, AAMA 803.3

3. Glazing: Setting blocks, edge blocks, and spacers in accordance with ASTM C 864, shore durometer hardness as

recommended by manufacturer; Glazing gaskets in accordance with ASTM C 864.

2.04 RELATED MATERIALS (Specified In Other Sections)

A. Glass: Refer to Division 8 Glass and Glazing Section for glass materials.


A. Shop Assembly: Fabricate and assemble units with joints only at intersection of aluminum members with hairline joints; rigidly secure, and sealed in accordance with manufacturer’s recommendations.


A. YKK AP America Anodized Plus® Finish:


YS1N* Clear Anodized Plus®

YH3N Champagne Anodized Plus®

YB1N Medium Bronze Anodized Plus®

YB5N* Dark Bronze Anodized Plus®

YK1N* Black Anodized Plus®

YW3N White Anodized Plus®

M Mill Finish

* Indicates standard finish usually carried as inventory.

Anodized Plus® is an advanced sealing technology that completely seals the anodic film yielding

superior durability (See AAMA 612).

B. Anodized Finishing: Prepare aluminum surfaces for specified finish; apply shop finish in accordance with the following:

1. Anodic Coating: Electrolytic color coating followed by an organic seal applied in accordance with the requirements

of AAMA 612. Aluminum extrusions shall be produced from quality controlled billets meeting AA-6063-T5.

a. Exposed Surfaces shall be free of scratches and other serious blemishes.

b. Extrusions shall be given a caustic etch followed by an anodic oxide treatment and then sealed with an organic coating applied with an electrodeposition process.

c. The anodized coating shall comply with all of the requirements of AAMA 612: Voluntary Specifications, Performance Requirements and Test Procedures for Combined Coatings of Anodic Oxide and Transparent Organic

Coatings on Architectural Aluminum. Testing shall demonstrate the ability of the finish to resist damage from

mortar, salt spray, and chemicals commonly found on construction sites, and to resist the loss of color and gloss.

d. Overall coating thickness for finishes shall be a minimum of 0.7 mils.

C. High Performance Organic Coating Finish:

1. Fluoropolymer Type: Factory applied two-coat 70% Kynar resin by Arkema or 70% Hylar resin by Solvay Solexis,

fluoropolymer based coating system, Polyvinylidene Fluoride (PVF-2), applied in accordance with YKK AP

procedures and meeting AAMA 2605 specifications.

2. Colors: Selected by Architect from the following:

a. Standard coating color charts.

b. Custom coating color charts.

c. Color Name and Number:

D. Finishes Testing:

1. Apply 0.5% solution NaOh, sodium hydroxide, to small area of finished sample area; leave in place for sixty minutes; lightly wipe off NaOh; Do not clean area further.

2. Submit samples with test area noted on each sample.


A. Compliance: Comply with manufacturer’s product data, including product technical bulletins, installation instructions,

and product carton instructions. The latest Installation Manual can be found at www.ykkap.com.

A. Site Verification of Conditions: Verify substrate conditions (which have been previously installed under other sections) are acceptable for product installation in accordance with manufacturer’s instructions.


A. Adjacent Surfaces Protection: Protect adjacent work areas and finish surfaces from damage during

product installation.

A. General: Install manufacturer’s system in accordance with shop drawings, and within specified tolerances.

1. Protect aluminum members in contact with masonry, steel, concrete, or dissimilar materials using nylon pads or

bituminous coating.

2. Shim and brace aluminum system before anchoring to structure.

3. Verify curtain wall system allows water entering system to be collected in gutters and wept to the exterior. Verify weep holes are open, and metal joints are sealed in accordance with manufacturers installation instructions.

4. Seal metal to metal curtain wall system joints using sealant recommended by system manufacturer.


A. Manufacturer’s Field Services: Upon request, provide manufacturer’s field service consisting of site visit for

inspection of product installation in accordance with manufacturer’s instructions.

B. Field Test: Conduct field test to determine watertightness of curtain wall system. Conduct test in accordance with

AAMA 501.2.


A. Adjusting: Adjust operating items as recommended by manufacturer.

B. Cleaning: The General Contractor shall clean installed products in accordance with manufacturer’s instructions prior

To Owner’s acceptance, and remove construction debris from project site. Legally dispose of debris.

C. Protection: The General Contractor shall protect installed product’s finish surfaces from damage during construction.


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