08 44 13 - Glazed Aluminum Curtain Walls.pdf

VA Northern Indiana Healthcare System, Fort Wayne

VA: 610-311 Expand Bldg 1 - 1 st Floor Primary Care

Fort Wayne, IN 46845

07-31-2020

Const. Document Submission

03-01-17

08 44 13 - 1

SECTION 08 44 13

GLAZED ALUMINUM CURTAIN WALLS

PART 1 - GENERAL

1.1 DESCRIPTION:

A. This section specifies glazed aluminum curtain wall system.

1. Thermally isolated, pressure equalized on interior.

2. Type: Stick system to include following:

a. Glass.

b. Integral reinforcing.

c. Closures, trim, subsills and flashings.

d. Column covers.

e. Fasteners, anchors, and related reinforcement.

1.2 RELATED WORK:

A. Structural Steel: Section 05 12 00, STRUCTURAL STEE L FRAMING.

B. Miscellaneous Metal Members: Section 05 50 00, META L FABRICATIONS.

C. Firestopping between Curtain Wall and Structure: Se ction 07 84 00, FIRESTOPPING.

1. Sheet Metal Flashing and Trim: Section 07 60 00, FL ASHING AND SHEET

METAL.

D. Joint Sealants: Section 07 92 00, JOINT SEALANTS.

E. Aluminum and Glass Hinged Entry Doors and Storefron t Construction:

Section 08 41 13, ALUMINUM-FRAMED ENTRANCES AND STO REFRONTS.

F. Glazing: Section 08 80 00, GLAZING.

G. Finish Color: Section 09 06 00, SCHEDULE FOR FINISH ES.

H. Louvers and Wall Vents: Section 08 90 00, LOUVERS A ND VENTS.

1.3 QUALITY ASSURANCE:

A. Qualifications:

1. Approval by Contracting Officer Representative (COR ) is required of products or service of proposed manufacturer, suppl iers and installers, and will be based upon submission by Co ntractor of certification that:

a. Manufacturers Qualifications: Manufacturer with fiv e (5) years continuous documented experience in design, fabrica tion, and installation of glazed aluminum curtain wall system s of similar type and for projects of equivalent size.

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b. Installer: Manufacturer approved in writing who has continuously installed glazed aluminum curtain walls systems of similar type and for projects of equivalent size for previous fi ve (5) years.

c. Manufacturer is to provide technical field represen tation at project site, as a minimum, at start of project, du ring middle, towards end of project, and during field testing of field mockup panel.

d. Manufacturers Professional Engineer Qualifications: A

Professional Engineer who is legally qualified to p ractice in state where Project is located and who is experienc ed in providing engineering services of kind indicated. E ngineering services are defined as those performed for install ations of glazed aluminum curtain walls that are similar to t hose indicated for this Project in material, design, and extent.

e. Testing Laboratory: Contractor is to retain AAMA ac credited commercial testing laboratory to perform tests spec ified. Submit information regarding testing laboratory’s faciliti es and qualifications of technical personnel to perform te sting specified in this section.

f. Product Options: Information on construction docume nts establishes requirements for aesthetic effects and performance characteristics of glazed aluminum curtain wall sys tem.

Aesthetic effects are indicated by dimensions, arra ngements, alignment, and profiles of components and assemblie s as they relate to sightlines, one another, and adjoining co nstruction.

Performance characteristics are indicated by criter ia subject to verification by one (1) or more methods including preconstruction testing, field testing, or in-servi ce performance.

1) Do not modify intended aesthetic effects. If modifi cations are proposed, submit comprehensive explanatory data for review.

g. Qualification of Welders:

1) Welding is to be performed by certified welders qua lified in accordance with AWS D1.2/D1.2M, using procedures, m aterials, and equipment of the type required for this work.

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B. Mockup:

1. Construct, at job site, full size typical wall unit which incorporates horizontal and vertical joints, framin g, window units, panels, glazing, sealants, and other accesso ries as detailed and specified. Mock-up wall unit location, size and design are to be as indicated on construction docum ents. Orient mockup to be facing full sun when constructed.

2. Performance Test

a. Conduct performance test of mockup after approval o f visual aspects has been obtained. Testing is to be perform ed on mockup according to requirements in “Field Quality Control”

Article.

b. Refer to Performance Requirements and Field Quality Control

Articles, this section, for testing requirements.

3. Approved Mock-up

a. After completion and approval of performance test r esults of job site mockup, as directed by COR, approved mock- up panel is to be used as minimum standard of comparison for en tire curtain wall system.

C. Pre-Installation Conference

1. Prior to starting installation of glazed curtain wa ll system schedule conference with COR to demonstrate the fol lowing:

a. Clear understanding of construction documents.

b. Onsite inspection and acceptance of structural and pertinent structural details relating to curtain wall system.

c. Coordination of work of various trades involved. C onference is to be attended by Contractor; personnel directly re sponsible for installation of curtain wall system, flashing a nd sheet metal work, firestopping system and curtain wall ma nufacturer and their technical field representatives. Conflict s are to be resolved and confirmed in writing.

1.4 SUBMITTALS:

A. In accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND

SAMPLES.

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B. Manufacturer's Literature and Product Data:

1. Manufacturer’s standard details and fabrication met hods.

2. Data on finishing, components, and accessories.

3. Instructions: Submit descriptive literature, detail specifications, performance test data and instructions for installa tion, and adjustments.

4. Recommendations for maintenance and cleaning of ex terior surfaces.

C. Shop Drawings:

1. Show elevations of glazed curtain wall system at 1 :48 (1/4 inch) scale, metal gages, details of construction, method s of anchorage, flashing and coping details, glazing details, fires topping assemblies at edge of slabs and details of installa tion. Show interfaces and relationships to work of other trade s and continuity with adjacent thermal, weather, air and vapor barri ers.

2. Submit for curtain wall system, accessories, and m ock-up. Tentative approval of drawings is to be received before fabri cation of mock-up. Final approval of drawings is to be deferr ed pending approval of mock-up and accessories.

3. Operation and Maintenance Manuals

a. Submit cleaning and maintenance instructions.

D. Samples:

1. Submit pairs of samples of each specified color an d finish on

305 mm (12-inch) long section by width of each tubu lar, or extruded shape section or 305 mm by 305 mm (12-inch by 12-in ch) wide sections of sheet shapes.

2. Submit corner section of framing members showing f asteners, panels, glazing methods, glazing materials, and weather-str ipping. Submit one (1) sample minimum 305 mm by 305 mm (12 inches by 12 inches).

In lieu of submitting separate samples for corner s ection, intermediate section, and panel, one (1) composite sample incorporating all components and features listed ma y be submitted.

3. Where normal color variations are anticipated, inc lude two (2) or more units of each sample indicating extreme limits of color variations.

E. Glass:

1. Specified in Section 08 80 00, GLAZING.

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F. Quality Assurance Submittals:

1. Design Data:

a. Submit structural and thermal calculations for comp lete wall assembly. Structural calculations and design shop d rawings signed and sealed by a Professional Engineer (PE).

2. Factory Test Reports:

a. Test Reports: Submit certified test reports, for ea ch of following listed tests, from a qualified independen t testing laboratory showing that glazed aluminum curtain wal l system assembly has been tested in accordance with specifi ed test procedures and complies with performance characteri stics as indicated by manufacturer’s testing procedures. Sub mit factory tests required except that where a curtain wall sys tem or component of similar type, size, and design as spec ified for this project has been previously tested within last year, under conditions specified herein, resulting test reports may be submitted in lieu of listed testing. Submit appropr iate testing reports for specific tests indicated below:

1) Deflection and structural tests.

2) Water penetration tests.

3) Air infiltration tests.

4) Delamination tests.

5) Thermal conductance tests.

G. Manufacturer's Certificates:

1. Submit Certificates of Compliance, with specificat ion requirements, for the following:

a. Metal extrusions.

b. Metal accessories.

c. Statement(s) that aluminum has been given specified thickness of anodizing or organic coating finish.

d. Statement(s) indicating manufacturers and installer s conform with qualifications as specified.

e. Submit list (minimum of five (5)) of equivalent pro ject size installations for both manufacturer and installer.

H. Manufacturer’s Field Reports:

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1. Submit field reports of manufacturer’s field repre sentative observations of curtain wall installation indicatin g observations made during inspection at beginning of project, dur ing middle of installation and at conclusion of project.

I. Welders: Submit welders qualifications as specified .

J. Testing Laboratory: Submit Testing Laboratory quali fications.

1.5 DELIVERY, STORAGE AND HANDLING:

A. Refer to AAMA CW 10 for care and handling of archit ectural aluminum from shop to site.

B. Prior to packaging for shipment from factory, mark wall components to correspond with shop and erection drawings and thei r placement location and erection sequence.

C. Prior to shipment from factory, place knocked-down lineal curtain wall members in cardboard containers and cover finished surfaces of members with protective covering of adhesive paper, waterpr oof tape, or strippable plastic. Do not cover metal surfaces tha t will be in contact with sealants after installation.

D. Inspect materials delivered to site for damage; unl oad and store with ventilation, free from heavy dust, not subject to c ombustion products or sources of water, and to permit easy access for inspection and handling. Sealing and caulking compounds, including handling, is to be in accordance with requirements of Section 07 92 00 , JOINT SEALANTS.

1.6 PROJECT CONDITIONS:

A. Field Measurements: Where glazed aluminum curtain w all systems are indicated to fit to other construction, verify dime nsions of other construction by field measurements before fabricati on and indicate measurements on shop drawings. Coordinate fabricati on schedule with construction progress to avoid delaying Work.

1.7 APPLICABLE PUBLICATIONS:

A. Publications listed below form a part of this speci fication to extent referenced. Publications are referred to in text by basic designation only.

B. American Architectural Manufacturers Association (A AMA):

501.8-14 ...............Test Method for Determinati on of Resistance of

Human Impact of Window Systems Intended for Use in Psychiatric Applications

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MCWM-1-89 ..............Metal Curtain Wall Manual

CW 10-12 ...............Care and Handling of Archit ectural Aluminum from Shop to Site

CW 11-85 ...............Design Windloads for Buildi ngs and Boundary

Layer Wind Tunnel Testing

CW 13-85 ...............Structural Sealant Glazing Systems (A Design

Guide)

TIR A11-04 .............Maximum Allowable Deflectio n of Framing Systems for Building Cladding Components of Design Wind

Loads

501-05 .................Methods of Test for Exterio r Walls

503-08 .................Field Testing of Metal Stor efronts, Curtain walls and Sloped Glazing Systems

2605-13 ................High Performance Organic Co atings on

Architectural Extrusions and Panels

C. American Society of Civil Engineers (ASCE):

ASCE 7-10 ..............Minimum Design Loads for Bu ildings and Other

Structures

D. ASTM International (ASTM):

A36/A36M-12 ............Structural Steel

A123/A123M-13 ..........Zinc (Hot-Dip Galvanized) C oatings on Iron and

Steel Products

A193/A193M-14a .........Alloy-Steel and Stainless S teel Bolting

Materials for High Temperature Service

A307-14 ................Carbon Steel Bolts and Stud s, 60,000 PSI

Tensile Strength

B209-14 ................Aluminum and Aluminum Alloy Sheet and Plate

B209M-14 ...............Aluminum and Aluminum Alloy Sheet and Plate

(Metric)

B211-12 ................Aluminum and Aluminum Alloy Bar, Rod, Wire

B211M-12 ...............Aluminum and Aluminum Alloy Bar, Rod, Wire

(Metric)

B221-14 ................Aluminum and Aluminum Alloy Extruded Bars, Rods, Wire, Shapes and Tubes

B221M-13 ...............Aluminum and Aluminum Alloy Extruded Bars, Rods, Wire, Shapes and Tubes (Metric)

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B316/B316M-10 ..........Aluminum and Aluminum Alloy Rivet and Cold-

Heading, Wire, and Rods

C578-14a ...............Rigid Cellular Polystyrene Thermal Insulation

C612-14 ................Mineral Fiber Block and Boa rd Thermal

Insulation

C920-14a ...............Elastomeric Joint Sealants

C794-10 ................Standard Test Method for Ad hesion-In-Peel of

Elastomeric Joint Sealants.

C1193-13 ...............Guide for Use of Joint Seal ants

C1363-11 ...............Thermal Performance of Buil ding Materials and

Envelope Assemblies by Means of a Hot Box

Apparatus

C1521-13 ...............Practice for Evaluating Adh esion of Installed

Weatherproofing

D1037-12 ...............Evaluating the Properties o f Wood-Base Fibers and Particle Panel Materials

E84-14 .................Surface Burning Characteris tics of Building

Materials

E330/E330M-14 ..........Structural Performance of E xterior Windows, Curtain Walls, and Doors by Uniform Static Air

Pressure Difference

E331-00(R2009) .........Water Penetration of Exteri or Windows, Curtain

Walls, and Doors By Uniform Static Air Pressure

Difference

E413-10 ................Classification for Rating S ound Insulation

E783-02(R2010) .........Test Method for Field Measu rement of Air

Leakage Through Installed Exterior Windows and

Doors

E1105-00(R2008) ........Field Determination of Wate r Penetration of

Installed Exterior Windows, Curtain Walls, and

Doors By Uniform or Cyclic Static Air Pressure

Differences

E. American Welding Society, Inc. (AWS):

D1.2/D.1.2M-06(R2014) ..Structural Welding Code-Alu minum

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F. Military Specifications (MIL):

MIL-C-18480 ............(Rev. B) Coating Compound, Bituminous Solvent, Coal Tar Base

G. National Association of Architectural Metal Manufac turers (NAAMM):

500 Series (2006) ......Metal Finishes Manual

H. Society for Protective Coatings (SSPC)

Paint 25-97 (2004) .....Zinc Oxide, Alkyd, Linseed Oil, Primer for Use

Over Hand Cleaned Steel Type I and Type II

Paint 20-82 (2019) .....Zinc-Rich Coating, Type I–I norganic, and Type

II-Organic.

I. U.S. Veterans Administration:

Physical Security Design Manual for VA Facilities ( VAPSDG); Life Safety

Protected

Physical Security Design Manual for VA Facilities ( VAPSDG); Mission

Critical Facilities

Architectural Design Manual for VA Facilities (VASD M)

J. Environmental Protection Agency (EPA):

40 CFR 59(2014) ........National Volatile Organic C ompound Emission

Standards for Consumer and Commercial Products

1.8 WARRANTY:

A. Construction Warranty: Comply with FAR clause 52.24 6-21, “Warranty of

Construction”.

B. Manufacturer Warranty: Manufacturer shall warranty their glazed aluminum curtain wall system for a minimum of five (5) years from date of installation and final acceptance by the Governm ent. Submit manufacturer warranty.

PART 2 - PRODUCTS

2.1 SYSTEM DESCRIPTION:

A. Design Requirements:

1. Basis of Design: Kawneer 1600 Curtainwall system w/ shear block per system requirements.

2. Curtain Wall System: Tubular aluminum sections wit h thermal break condition self-supporting framing, factory prefinis hed, vision glass; related flashings, anchorage and attachment devices.

3. System Assembly: Site assembled.

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4. Maximum wall framing member deflection, in a direc tion normal to plane of wall: 1/175 of its clear span or 20 mm (3/ 4 inch), whichever is less, when designed in accordance with requirements of

AAMA TIR A11 and tested in accordance with ASTM E33 0/E330M.

5. Maximum wall framing member deflection when a gypsu m wallboard surface is affected: 1/360 of span.

6. Maximum Framing Member Permanent Deformation: 0.2 p ercent of its clear span when tested in accordance with ASTM E330 /E330M for a minimum test period of 10 seconds at 1.5 times desi gn wind pressures indicated as part of structural drawing w ind load requirements.

B. No glass breakage, or damage to fasteners, hardware or accessories is permitted due to deformation design requirements in dicated.

a. Provide system complete with framing, mullions, tri m, fasteners, anchors, accessories, concealed auxiliary members, and attachment devices for securing wall to structure a s specified or indicated. Unless noted otherwise, comply with A AMA MCWM-1.

b. Obtain all components of curtain wall system, inclu ding framing entrances from single manufacturer.

c. Fully coordinate system accessories directly incorp orated and adjacent to contiguous related work and ensure mate rials compatibility, deflection limitations, thermal move ments, and clearances and tolerances as indicated or specified . Coordinate continuity with adjacent thermal, weather, air and vapor barriers.

d. Provide system with adequate allowances for expansi on and contraction of components and fastenings to prevent buckling damage, joint seal failure, glass breakage, undue s tress on fastenings or other detrimental effects. For design purposes, base provisions for thermal movement on assumed amb ient temperature range of from -18 degrees C to 49 degre es C (0 degrees F to 120 degrees F).

e. Provide wall system to accommodate tolerances in bu ilding frame and other contiguous work as indicated or specified .

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C. Calculations: Submit professionally prepared calcul ations to indicate how design requirements for structural loading, the rmal, and other performance criteria have been satisfied.

2.2 PERFORMANCE REQUIREMENTS:

A. Delegated Design: Engage a qualified Professional E ngineer, to design glazed aluminum curtain walls.

B. Conform with system performance requirements specif ied.

C. Provide curtain wall components tested in accordanc e with requirements below and meeting performance requirements specifie d:

1. System Design: Design and size components to withst and dead loads and live loads caused by positive and negative wind loads acting normal to plane of wall as calculated in accordance with code and as measured in accordance with ASTM E330/E330M.

2. Water Penetration:

a. No water penetration is to occur when wall is teste d in accordance with ASTM E331 at a differential static test pressure of 20 percent of inward acting design wind pressure as indicated on structural drawings, but not less than 479 Pa (1 0 psf).

b. Make provision in wall construction for adequate dr ainage to outside of water leakage or condensation that occur s within outer face of wall. Leave drainage and weep opening s in members and wall open during test.

3. Air Infiltration: Test glazed aluminum curtain wal l system according to AAMA 503, which requires testing accor ding to

ASTM E783.

a. Static-Air-Differential: 75 Pa (1.57 lbf/sq. ft.) m inimum.

b. Air Leakage: 0.03 L/s per sq. m (0.06 cfm/sq. ft.) of surface maximum.

4. Deflections Test: ASTM E330/E330M, Procedure B:

a. No member is to deflect in a direction parallel to plane of wall, when carrying its full design load, more than an amount which will reduce edge cover or glass bite below 75 percent of design dimension. No member after deflection under full design load, is to have a clearance between itself and top of panel, glass, sash, or other part immediately below it les s than 3 mm

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(1/8 inch); clearance between member and an operabl e window or door is to be minimum 1.5 mm (1/16 inch).

5. Delamination Test:

a. Adhesively bonded metal-faced panels are to show n o evidence of delamination, warpage or other deterioration or dam age when subjected to the six "Accelerated Aging Cycles" spe cified in

ASTM D1037.

6. Thermal Conductance Tests: ASTM C1363.

a. The thermal transmittance of opaque panels are not to exceed a

U-value, Btu/hr./sq. ft./ degree F, as required and indicated on construction documents for exterior wall system, wh en tested in accordance with ASTM C1363. Average calculated ther mal transmittance of complete wall assembly including p anels, windows, and all other components are not to exceed a U-value of

0.43.

7. Sound Attenuation Through Wall System (Exterior to Interior):

a. STC 50, measured in accordance with ASTM E413.

8. Physical Security Mission Critical Facilities:

a. Provide glazed aluminum curtain walls designed to m eet or exceed the design and construction standards as provided i n the

Physical Security Design Manual for VA Facilities: Mission

Critical Facilities.

1) Blast Resistance: Design level vehicle threat (W2) located at the standoff distance, but not greater than GP2.

2.3 MATERIALS:

A. Extruded Aluminum Framing Members: ASTM B221M (B221 ); 6063-T5 extruded aluminum for non-structural components or 6063-T6 e xtruded aluminum for structural members; temper and alloy as recommended by manufacturer.

B. Sheet Aluminum: ASTM B209M (B209); 6065-T5 temper a nd alloy as recommended by manufacturer.

1. Formed flashing and closures: Minimum 1.58 mm (0.0 62 inch) thick aluminum, in finish as selected.

2. Extruded sill members: Minimum 1.58 mm (0.062 inch ) thick aluminum, in finish as selected.

C. Steel Sections: ASTM A36/A36M.

D. Primer: TS TT-P-645; red, for shop application and field touch-up.

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E. Fasteners:

1. For Exterior Cap Retainers: ASTM A193/A193M B8 300 series, stainless steel screws.

2. For Framework Connections: ASTM B211M (B211) 2024-T 4 aluminum, ASTM A193/A193M B8 300 series, stainless steel, and ASTM B316 aluminum rivets, as required by connection.

3. For Anchoring Glazed Aluminum Curtain Wall to Suppo rt Structure:

ASTM A307 zinc plated steel fasteners.

F. Shims: Metal or plastic.

G. Joint Sealants and Accessories:

1. In accordance with requirements specified in Secti on 07 92 00, JOINT SEALANTS.

2. Structural Flush Glazed Joints: High performance s ilicone sealant applied in accordance with manufacturer's recommend ations.

3. Non-structural Flush Glazed Joints and Weather Sea l Joints:

Silicone sealants applied in accordance with manufa cturer's recommendations.

4. Sealants used inside the weatherproofing system are to have a VOC content of 250 g/L or less when calculated accordin g to 40 CFR 59, (EPA Method 24).

5. Comply with recommendations of sealant manufacture r for specific sealant selections.

6. Provide only sealants that have been tested per AS TM C794 to exhibit adequate adhesion to samples of glass and m etal equivalent to those required for project.

7. Exposed Metal to Metal Joints: Silicone sealant se lected from manufacturer’s standard colors.

H. Glazing Materials:

1. As specified under Section 08 80 00, GLAZING.

2. Glazing Gaskets:

a. Exterior: Continuous EPDM gaskets at each glass an d spandrel panel.

b. Interior: Continuous, closed cell PVC foam sealant tape, sealed at corners.

3. Glass Sizes and Clearances:

a. Accommodate up to 25 mm (1 inch) glazing.

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b. Sizes indicated are nominal. Verify actual sizes r equired by measuring frames. Coordinate dimensions for glass a nd glass holding members to meet applicable minimum clearanc es as recommended by glass manufacturer. Do not nip glass to remove flares or to reduce oversized dimensions. All cutti ng is to occur in factory.

4. Glass Setting Materials:

a. Provide head bead and drive wedge required for glas s installation to suit curtain wall system in accorda nce with manufacture’s recommendations.

I. Column Covers Exterior and Interior Surfaces: to ma tch curtain wall mullion sections.

J. Firestopping: Refer to Section 07 84 00, FIRESTOPPI NG for requirements.

2.4 FABRICATION:

A. Curtain wall components are to be of materials and thickness indicated in construction documents. Details indicated are re presentative of required design and profiles. Maintain sightlines. Unless specifically indicated or specified otherwise, methods of fabric ation and assembly are to be at discretion of curtain wall manufacture r. Perform fitting and assembling of components in shop to maximum ext ent practicable.

Anchorage devices are to permit adjustment in three directions. No exposed fasteners are permitted.

B. Joints: Joints exceeding +1.5 mm (+1/16") are to be mechanically fastened.

C. Ventilation and Drainage: Direct water leakage to e xterior by means of concealed drainage system and weeps. Flashings and other materials used internally are to be nonstaining, noncorrosive, and nonbleeding.

D. Protection and Treatment of Metals:

1. Remove from metal surfaces lubricants used in fabr ication and clean off other extraneous material before leaving shop.

2. Provide protection against galvanic action wherever dissimilar metals are in contact, except in case of aluminum i n permanent contact with galvanized steel, zinc, stainless stee l, or relatively small areas of white bronze. Paint contact surfaces with one coat bituminous paint conforming to MIL-C-18480 or apply appropriate

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08 44 13 - 15 caulking material or nonabsorptive, noncorrosive, a nd nonstaining tape or gasket between contact surfaces.

E. Metal sills and Closures: Fabricate accessories, sp andrel panels, trim closures of sizes and shapes indicated from similar materials and finish as specified for wall system.

2.5 METAL FINISHES:

A. In accordance with NAAMM AMP500 series.

B. Anodized Aluminum:

1. AA-C22A41 Chemically etched medium matte, with clea r anodic coating, Class 1 Architectural, 0.7-mil thick (min. ).

2. AA-C22A44 Chemically etched medium matte with elect rolytically deposited metallic compound, integrally colored coa ting Class 1

Architectural, 0.7-mil thick finish. Dyes will not be accepted.

a. Black.

C. High-Performance Organic Finish: Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating an d resin manufacturers’ written instructions.

1. Three -coat fluoropolymer finish complying with AAM A 2605 and containing not less than 50 percent PVDF resin by w eight in both color coat and clear topcoat. Color as specified in Section 09 06

00, SCHEDULE FOR FINISHES.

D. Concealed Steel Items: Galvanized in accordance wit h ASTM A123/A123M to

610 gm/sq. m (2.0 oz./sq. ft.) Primed with iron ox ide paint.

E. Apply one (1) coat of bituminous paint to concealed aluminum and steel surfaces one (1) coat(s) in contact with cementitio us or dissimilar materials.

PART 3 - EXECUTION

3.1 EXAMINATION:

A. Prior to installation of glazed curtain wall system , arrange for representative(s) of manufacturer to examine struct ure and substrate to determine that they are properly prepared, and read y to receive glazed curtain wall work included herein.

B. Verifying Conditions and Adjacent Surfaces: After e stablishment of lines and grades and prior to system installation e xamine supporting structural elements. Verify governing dimensions, i ncluding floor elevations, floor to floor heights, minimum clearan ces between curtain

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08 44 13 - 16 wall and structural frames, and other permissible d imensional tolerances in building frame.

3.2 PREPARATION:

A. Take field dimensions and examine condition of subs trates, supports, and other conditions under which work of this secti on is to be performed to verify that work may properly commence . Do not proceed with installation until unsatisfactory conditions h ave been corrected.

B. Contact between aluminum and dissimilar metals are to receive a protective coating of bituminous paint for preventi on of electrolytic action and corrosion.

3.3 INSTALLATION:

A. Install and erect glazed curtain wall system and al l components in accordance with written directions of curtain wall manufacturer. Match profiles, sizes, and spacing indicated on approved shop drawings.

B. Bench Marks and Reference Points: Establish and per manently mark bench marks for elevations and building line offsets for alignment at convenient points on each floor level. Should any e rror or discrepancy be discovered in location of marks, stop erection w ork in that area until discrepancies have been corrected.

C. Ensure that drainage system operates properly in ac cord with AAMA 501 procedures.

D. Do not proceed with structural silicone work when m etal temperature is below 0 degrees C (32 degrees F).

E. Isolate between aluminum and dissimilar metals with protective coating or plastic strip to prevent electrolytic corrosion.

F. Install glazed aluminum curtain wall system so as t o maintain a virtually flat face cap, with no visible bowing.

G. Install entire system so that fasteners are not vis ible.

H. Tolerances:

1. Maximum variation from plane or location shown on approved shop drawings: 3 mm per 3657 mm (1/8 inch per 12 feet) o f length up to not more than 13 mm (1/2 inch) in any total length.

2. Maximum offset from true alignment between two (2) identical members abutting end to end in line: 0.8 mm (1/32 i nch).

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3. Sealant Space Between Curtain Wall Mullion and Adj acent

Construction: Maximum of 19 mm (3/4 inch) and minim um of 6 mm

(1/4 inch).

I. Joint Sealants:

1. Joint Sealants: Are to be in accordance with requi rements of

Section 07 92 00, JOINT SEALANTS.

2. Surfaces to be primed and sealed are to be clean, dry to touch, free from frost, moisture, grease, oil, wax, lacque r, paint, or other foreign matter. Enclose joints on three sides . Clean out grooves to proper depth. Joint dimensions are to co nform to approved detail drawings with a tolerance of plus 3 mm (1/8 inch).

Do not apply compound unless ambient temperature is between 5 and

35 degrees C (40 and 90 degrees F). Clean out loose particles and mortar just before sealing. Remove protective coati ngs or coverings from surfaces in contact with sealants before apply ing sealants or tapes. Solvents used to remove coatings are to be o f type that leave no residue on metals.

3. Match approved sample. Force compound into grooves with sufficient pressure to fill grooves solidly. Sealing compound is to be uniformly smooth and free of wrinkles and, unless i ndicated otherwise, is to be tooled and left sufficiently co nvex to result in a flush joint when dry. Do not trim edges of sea ling material after joints are tooled. Mix only amount of multi-c omponent sealant which can be installed within four (4) hours, but a t no time is this amount exceed 19 liters (5 gallons).

4. Apply primer to masonry, concrete, wood, and other surfaces as recommended by sealant manufacturer. Do not apply p rimer to surfaces which will be exposed after sealant work i s completed.

5. Tightly pack backing in bottom of joints which are over 13 mm

(1/2 inch) in depth with specified backing material to depth indicated in construction documents. Roll backing m aterial of hose or rod stock into joints to prevent lengthwise stre tching.

6. Install bond preventive material at back or bottom of joint cavities in which no backstop material is required, covering full width and length of joint cavities.

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7. Remove compound smears from surfaces of materials adjacent to sealed joints as work progresses. Use masking tape on each side of joint where texture of adjacent material will be di fficult to clean. Remove masking tape immediately after fillin g joint. Scrape off fresh compound from adjacent surfaces immediate ly and rub clean with solvent approved by sealant and curtain wall m anufacturers.

Upon completion of sealing, remove remaining smears , stains, and other soiling, and leave work in clean neat conditi on.

J. Glass:

1. Refer to Section 08 80 00, GLAZING, and drawings f or glass types.

Install in accordance with manufacturer's recommend ations as modified herein.

2. Before installing glass, inspect sash and frames t o receive glass for defects such as dimensional variations, glass c learances, open joints, or other conditions that will prevent satis factory glass installation. Do not proceed with installation unti l defects have been corrected.

3. Clean sealing surfaces at perimeter of glass and s ealing surfaces of rebates and stop beads before applying glazing c ompound, sealing compound, glazing tape, or gaskets.

4. Use only approved solvents and cleaning agents reco mmended by compound or gasket manufacturer and by curtain wall manufacturer.

5. Provide sashes designed for outside glazing.

6. Provide continuous snap in glazing beads to suit gl ass as specified.

7. Insulating and tempered glass, and glass of other types that exceed

2540 mm (100 united inches) in size: Provide void s pace at head and jamb to allow glass to expand or move without exudi ng sealant.

Provide perimeter frames and ventilator sections wi th glazing rebates for unobstructed glazing surface 19 mm (3/4 inch) in height. Glazing rebate surfaces must be sloped to s hed water.

8. Provide adequate means to weep incidental water an d condensation away from sealed edges of insulated glass units and out of wall system. Provide weeping of lock-strip gaskets in ac cordance with recommendation of glass manufacturer.

K. Metal Copings:

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1. Refer to Section 07 60 00, FLASHING AND SHEET META L for requirements of metal copings when they are not a p art of glazed curtain wall system work.

2. Coordinate curtain wall installation with metal co ping detail on construction documents. Provide watertight seal to meet criteria set forth in this section regarding air and water p enetration.

3.4 ADJUSTING:

A. Adjust doors to provide a tight fit at contact poin ts and operate easily.

B. Adjust weather-stripping to make even contact with surfaces.

C. Adjust operating hardware and moving parts.

3.5 CLEANING:

A. Install curtain wall frame and associated metal to avoid soiling or smudging finish.

B. Clean metal surfaces promptly after installation, e xercising care to avoid damage to coatings.

C. Remove excess glazing and sealant compounds, dirt, and other substances.

D. Follow recommendations of manufacturer in selection of cleaning agents.

Do not use cleaning agents containing ammonia or ot her compounds that might damage finished metal surfaces.

E. Replace cracked, broken, and defective glass with n ew glass at no additional cost to Government. Just prior to final acceptance of curtain wall system clean glass surfaces on both si des, remove labels, paint spots, compounds, and other defacements, and clean metal fixed panels. Remove and replace components that cannot b e cleaned successfully.

3.6 FIELD QUALITY CONTROL:

A. Testing Agency: Engage an AAMA accredited commercia l qualified independent testing and inspecting agency to perfor m field quality-control tests specified, and to prepare tes t reports: Submit information regarding testing laboratory's faciliti es and qualifications of technical personnel to COR for ap proval.

B. Conduct field check test for water leakage on desig nated wall areas after erection to comply with AAMA MCWM-1. Conduct test on two (2) wall

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Conduct test and take necessary remedial action as directed by COR.

C. Test Specimen:

1. Test specimen is to include curtain wall assembly a nd construction.

Test chamber is to be affixed to exterior side of t est specimen and test is to be conducted using positive static air p ressure.

2. Test specimens are to be selected by COR after curt ain wall system has been installed in accordance with construction documents.

D. Sealant Adhesion Tests: Test installed sealant, in presence of sealant manufacturer’s field representative, in a minimum o f two (2) areas and as follows:

1. Test weatherseal sealant adhesion to joint substrat es according to

Method A, Field-Applied Sealant Joint Hand Pull Tab , in Appendix X1 in ASTM C1193 or Method A, Tail Procedure, in ASTM C1521.

E. Air Infiltration: Test glazed aluminum curtain wall system according to

AAMA 503, which requires testing according to ASTM E783 and to values indicated below, whichever is more stringent.

1. Field air leakage testing is not required for cont inuous curtain wall systems.

2. Static-Air-Pressure Differential: 75 Pa (1.57 lbf/s q. ft.) minimum.

3. Air Leakage: 0.03 L/s per sq. m (0.06 cfm/sq. ft.) of surface maximum.

F. Water Penetration: Test glazed aluminum curtain wal l system for compliance with requirements according to AAMA 503, which requires testing according to ASTM E1105.

1. Uniform Static-Air-Pressure Difference: 20 percent of positive design wind load, but not less than 479 Pa (10 psf) . No uncontrolled water is to be present.

G. Retesting:

1. Should system fail field test, system may be modifi ed or repaired, and retested.

2. Should system fail second field test, system may be additionally modified or repaired, and retested.

3. All modifications and repairs made to tested areas are to be recorded, and same modifications and repairs made t o all system and adjacent construction on project.

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4. Should second test fail, COR may require testing of additional areas of the curtain wall.

H. Rejection:

1. Failure of any of specimens to meet test requiremen ts of third test is cause for rejection of wall system and adjacent construction on project.

3.7 DEMONSTRATION, TESTING, AND ACCEPTANCE:

A. Instruct Government’s personnel in proper operation and maintenance of horizontal sliding entrance door equipment. Train p ersonnel in procedures to follow in event of operational failur es or malfunctions.

B. Acceptance: At completion of project, and as a cond ition of acceptance, horizontal sliding entrance door equipment and syst ems are to be operated for a period of fifteen (15) consecutive c alendar days without breakdown.

3.8 PROTECTION:

A. After installation, protect windows, and other expo sed surfaces from disfiguration, contamination, contact with harmful materials, and from other construction hazards that will interfere with their operation, or damage their appearance or finish. Protection metho ds are to be in accordance with recommendations of product manufact urers or of respective trade association. Remove paper or tape factory applied protection immediately after installation. Clean su rfaces of mortar, plaster, paint, smears of sealants, and other forei gn matter to present neat appearance and prevent fouling of operation. I n addition, wash with a stiff fiber brush, soap and water, and thoro ughly rinse. Where surfaces become stained or discolored, clean or res tore finish in accordance with recommendations of product manufact urer or respective trade association.

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