GENERAL SPECIFICATION OF

Ai ALUMINUM PERFORAMNCE LOUVER

PART 1 GENERAL

1.01 RElated documents

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions, apply to this Section.

1.02 summary

A. This Section includes the following:

1. Fixed, extruded-aluminum STORM RESISTANCE LOUVER

B. Related Sections include the following:

1. Section of "Joint Sealers" for sealants installed in perimeter joints between louver frames and adjoining construction.

2. Section of “Metal Fabrications”.

3. MEP Engineer’s Specifications for mechanical and electrical work.

1.03 DEFINITIONS

A. Louver Terminology:  Definitions of terms for metal louvers contained in the 4^th Edition of HEAVC Technical Specification Laboratory testing of weather louvers apply to this Section unless otherwise defined in this Section or in referenced standards.

B. AMCA 500 (Air Movement Control Association) - Test Method for Louvers, Dampers, and Shutters

C. Free Area - Calculation method has to be followed with the definition contained in AMCA Publication 501-93

1.04 PERFORMANCE REQUIREMENTS

A. Structural Performance:  Provide louvers capable of withstanding the effects of gravity loads and the following loads and stresses within limits and under conditions indicated without permanent deformation of louver components, noise or metal fatigue caused by louver blade rattle or flutter, or permanent damage to fasteners and anchors.  Wind pressures shall be considered to act on vertical projection of louvers. Material thicknesses in this Section are minimums; provide thicker material and additional components to meet structural performance requirements.

B. Wind Loads:  Determine loads based on pressures as indicated on Drawings and in accordance with local codes.

1. Design and calculation parameters shall be submitted by the supplier/manufacturer and approved by Structural Consultant prior to detail calculation for submission.

2. Air-Performance, Water-Penetration, Air-Leakage, and Wind-Driven Rain Ratings:  Provide louvers complying with performance requirements indicated, as demonstrated by testing manufacturer's stock units identical to those provided, except for length and width according to HEVAC Technical Specification (4^th Edition) “Laboratory Testing And Rating Of Weather Louvers When Subjected To Simulated Rain”.

1.05 SUBMITTALS

A. Submit the following in accordance with Construction Manager’s Procedures Manual:

1. Product Data:  For each type of product indicated.

2. Shop Drawings:  For louvers and accessories.  Include plans, elevations, sections, details, and attachments to other Work.  Show blade profiles, angles, and spacing.

3. Structural calculations: Submit calculations showing capability to withstand wind load or other loading for Architect’s and Engineer’s approval whenever requested.

4. Samples for Initial Selection:  For units with factory-applied color finishes.

5. Samples for Verification:  For each type of metal finish required.

6. Product Test Reports:  Based on evaluation of comprehensive tests performed by a qualified testing agency or by manufacturer and witnessed by a qualified testing agency, for each type of louver.

7. Operations and Maintenance Manual:

a. 2 sets of draft Operations and Maintenance Manual, fully describing the future maintenance procedure and requirement of the louver system, shall be submitted to the Architect for review and comment, 30 days prior to the anticipated completion of louver installation.

b. Upon approval by the Architect, 3 sets of Operations and Maintenance Manual shall be submitted to the Contract Manager.

c. The supplier shall organize and conduct operations and maintenance training sessions (at least 2 sessions) for future building management operator.

1.06 WARRANTY

A. The supplier and manufacturer shall provide a 10 year comprehensive warranty for the products and workmanship.  The form of warranty shall comply with the requirement and standard as stipulated by the Architect and Contract Manager

1.07 QUALITY ASSURANCE

A. Source Limitations:  Obtain louvers and vents through one source from a single manufacturer where indicated to be of same type, design, or factory-applied color finish.

B. Perform work in accordance with recognized International quality assurance standards, such as Quality Standard type ISO 9001

1.08 PROJECT CONDITIONS

A. Field Measurements:  Verify louver openings by field measurements before fabrication and indicate measurements on Shop Drawings.

1.  

B. Established Dimensions:  Where field measurements cannot be made without delaying the Work, establish opening dimensions and proceed with fabricating louvers without field measurements.  Coordinate construction to ensure that actual opening dimensions correspond to established dimensions.

PART 2 PRODUCTS

2.01 MANUFACTURERS

A. Available Manufacturer:  Ai aluminum performance louver by Architecture Intelligence LLC.

B. Other manufacturers may be considered subject to the following product selection requirements:

1. Other manufacturers:  Has to be one of the members of AMCA and can be verified from current AMCA Website.

2. Subject to compliance with requirements, manufacturers with products comparable to the specified products shall be considered upon submission with full literary and product catalogue of the proposed manufacturer(s).

3. Products:  All louver products shall be from a single manufacturer.

4. Basis-of-Design Product:  The design for each louver is based on the product named.  Subject to compliance with requirements, provide either the named product or a comparable product by other approved manufacturers.

2.02 MATERIALS

A. Aluminum Extrusions:  ASTM B211, Alloy 6063-T5, or 6061-T6.

B. Aluminum Sheet:  ASTM B3209, Alloy 1100, 3003 or 5005 with temper as required for forming, or as otherwise recommended by metal producer for required finish.

C. Galvanized Steel Sheet:  ASTM A 653/A 653M, G90 (Z275) zinc coating, mill phosphatized.

D. Fasteners:  Of same basic metal and alloy as fastened metal or galvanized mild steel, unless otherwise indicated.  Do not use metals that are incompatible with joined materials.

1. Use types and sizes to suit unit installation conditions.

2. Use hex-head or Phillips pan-head screws for exposed fasteners, unless otherwise indicated.

3. Do not use pop rivets as fasteners to structures or within any part of the louver components.

E. Post-installed Fasteners for Concrete and Masonry:  Torque-controlled expansion anchors, made from compatible components with fasteners, with capability to sustain, without failure, a load as determined by Structural Consultant and in compliance with local structural & wind loading codes.

F. Bituminous Paint:  Cold-applied asphalt emulsion complying with ASTM D 1187.

2.03 FABRICATION, GENERAL

A. Assemble louvers in factory to minimize field splicing and assembly.  Disassemble units as necessary for shipping and handling limitations.  Clearly mark units for reassembly and coordinated installation.

B. No pop rivets are allowed at any part of the louver system.

C. Front louver blade and rear louver blade has to be come in one single piece, with mechanical fixing to louver jambs. Splitting into 2 pieces of blade or interlocking fixing of blade is not allowed.

D. All aluminum components of louver have to be extruded. No bent sheet or roll form can be accepted including blade clips and louver mullions to ensure consistency and straightness.

E. Vertical Assemblies:  Where height of louver units exceeds fabrication and handling limitations, fabricate units to permit field-bolted assembly with close-fitting joints in jambs and mullions, reinforced with splice plates.

F. Maintain equal louver blade spacing to produce uniform appearance.

G. Fabricate frames, including integral sills, to fit in openings of sizes indicated, with allowances made for fabrication and installation tolerances, adjoining material tolerances, and perimeter sealant joints.

H. Frame Type:  As indicated.

I. Include supports, anchorages, and accessories required for complete assembly.

J. Provide vertical mullions of type and at spacings indicated, but not more than recommended by manufacturer and to be substantiated by structural calculation, or 59 inches (1500 mm) o.c., whichever is less.

K. Where indicated, provide or extended sills for recessed louvers.

L. Join frame members to each other and to fixed louver blades with fillet welds, threaded fasteners, or both, as standard with louver manufacturer, concealed from view, unless otherwise indicated or size of louver assembly makes bolted connections between frame members necessary.

2.04 FIXED, EXTRUDED-ALUMINUM LOUVERS

A. Storm resistance Louvers

1. Description: Heads, sills, jambs and mullions shall be one-piece structural aluminum members with integral caulking slot and retaining beads. Mullion Line (visible mullions) Sightproof storm resistance fixed single piece blade profile in dual configuration designed to collect and drain water to exterior sill by means of multiple gutters in blades and channels integral to jambs and mullions. Total system depth not to exceed 50.8mm. Louver panels supplied in complete in modular form and to be installed in accordance with the manufacturer’s recommended procedures to ensure complete water integrity performance.  

2. Material thickness: Provide at least the following:

a. Heads, sills, jambs, mullions and flashings: 2.06 mm.

b. Outer blades: 1.52 mm.

3. HEVAC (4^th Edition) Performance: 1000 x 1000 mm unit shall conform to the following:

4. AMCA-500-L-99 Wind Driven Rain Performance: HEVAC (4^th Edition) Technical Specification Laboratory testing of weather louvers when subjected to simulated rain, based on a 1m x 1m unit tested at rain fall rate of 75mm/hr and with wind directed at louver face of velocity of 13 m/s. The test data shall show the water penetration effectiveness rating at each corresponding ventilation rate as follows:

2.05 LOUVER SCREENS

A. General:  Provide screen at each exterior louver and as indicated.

B. Screen Location for Fixed Louvers:  Interior face.

C. Screening Type: Insect screening.

D. Secure screens to louver frames with stainless-steel machine screws, spaced a maximum of 150 mm from each corner and at 300 mm on center.

E. Louver Screen Frames:  Fabricate with mitered corners to louver sizes indicated.

1. Material:  Same kind and form of metal as indicated for louver to which screens are attached.

a. Aluminum Louvers: 1.60mm thick extruded aluminum frames

2. Finish: Same finish as louver frames to which louver screens are attached.

3. Type:  Rewirable frames with a driven spline or insert for securing screen mesh.

F. Louver Screen Material:

1. Material:  Same kind of metal as indicated for louver to which screens are attached.

2. Screen Configuration:

a. Aluminum Louvers: 30-by-15-mm opening diamond expanded aluminum screen in 2mm thick

2.06 BLANK-OFF PANELS

A. Uninsulated, Blank-off Panels:

1. Aluminum sheet for aluminum louvers, not less than 1.5-mm nominal thickness, unless otherwise indicated.

2. Panel Finish:  Same finish applied to louvers.

3. Attach blank-off panels to back of louver frames with screws of compatible material to the louver.

2.07 FINISHES, GENERAL

A. Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes.

B. Finish louvers after assembly.

2.08 ALUMINUM FINISHES

A. PVF2 Fluorocarbon 3 Coat Paint System: Prepared and applied in accordance with the following performance requirements and standards:

1. Meet or exceed the performance requirements of the AAMA605.2 “Specification for High Performance Organic Coatings on Architectural Extrusions and Panels:.

2. Application of the finish shall be performed under specifications issued by the licensed formulator and by an applicator specifically approved by one (or more) of the formulators.  Applicator shall provide written notification of approval by a formulator prior to application of the finish.

3. The fluorocarbon 3 coat system shall consist of:

a. First coat:  Inhibitive primer, with a dry film thickness averaging 5-7 microns.

b. Second coat:  Fluorocarbon color coat, with a minimum dry thickness of 25 microns.

c. Third coat:  Fluorocarbon clear coat, with a minimum dry thickness of 10-20 microns.

4. Performance Criteria

The fluorocarbon coating system shall meet or exceed the following performance requirements of AAMA 605.2 specifications for High Performance Organic Coatings on architectural Extrusions and Panels.

a.  Colour retention 

Maximum of 5E N.B.S units, as determined in accordance with ASTM D2244 after removal of external deposits and after exposure for 5000 hours in Sunshine Arc Weatherometer XWR using 50/60 cycle.

b. Chalk Resistance

Not greater than No. 8 for colour finish and No. 6 for white finish based on ASTM D659 after exposure for 5000 hours in Sunshine Arc Weatherometer XWR using 50/60 cycle. Chalking shall be measured on and exposed, unwashed painted surface.

c. Humidity Resistance

Withstand 3000 hours at 100 deg F and 100% relative humidity with no formation of blisters to extent greater than “Few” blister Size No. 8, as show in figure No. 4, all in accordance with ASTM D714

d. Salt Spray

Withstand 3000 hours at 5% fog at 95 deg F with 1/16 inch maximum undercutting of film from scored lines or cut edges when taped and pulled off at right angles, all in accordance with ASTM B117

e. Dry Film Hardness

No rupture of film using a Berol Eagle Turquoise pencil Grade F minimum hardness, test in accordance with ASTM D3363

f. Gloss

25% - 30% reflectivity on 60⁰ glossmeter as per approved sample in accordance with ASTM D523

g. Adhesion

No removal of film under the tape within or outside of the cross-hatched area or blistering when tape tested over 1/16 inches cross hatching wet and dry, all in accordance with AAMA 605.2

h. Abrasion Resistance

Abrasion Coefficient value of 20 minimum, in accordance with ASTM D968

i. Impact Resistance

To withstand 0.10 inch +/- 0.01 inch direct deformation of sample with Gardner Variable Impact Tester, 160 inch-pound range, with no removal of film on tapes

j. Mortar Resistance

Withstand wet mortar, 24 hour pat test at 100% R.H. without gaining adhesion or any visual effect on the painted surface of solid colours

k. Muriatic Acid Resistance

Withstand exposure 2to 10% Muriatic Acid Solution – 15 minutes spot test with no blistering or visual change in appearance

l. Detergent Resistance

Withstand immersion in 3% synthetic detergent solution for 72 hours at 100 deg F with no loss of adhesion and no visible change in appearance when examined by the unaided eye

5. The total minimum dry film thickness of the fluorocarbon coating shall be 40 microns.  This coating system shall be spray-applied and thermo-cured at 230-250 C or as specified by paint manufacturer.  The micron thickness shall be measured in accordance with ASTM B 244-29.

6. Batch testing of paint finish shall be carried out by supplier including:

a. Crosshatch adhesion list.

b. Bending test for cracking or flaking.

c. Impact testing to check for cracking or flaking.

d. Gauge testing to check micron thickness

7. Color: To match approved sample.

PART 3 EXECUTION

3.01 EXAMINATION

A. Examine substrates and openings, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance.

B. Proceed with installation only after unsatisfactory conditions have been corrected.

3.02 PREPARATION

A. Coordinate setting drawings, diagrams, templates, instructions, and directions for installation of anchorages that are to be embedded in concrete or masonry construction.  Coordinate delivery of such items to Project site.

3.03 INSTALLATION

A. Locate and place louvers and vents level, plumb, and at indicated alignment with adjacent work.

B. Use concealed anchorages where possible.  Provide brass or lead washers fitted to screws where required to protect metal surfaces and to make a weathertight connection.

C. Form closely fitted joints with exposed connections accurately located and secured.

D. Provide perimeter reveals and openings of uniform width for sealants and joint fillers, as indicated.

E. Repair finishes damaged by cutting, welding, soldering, and grinding.  Restore finishes so no evidence remains of corrective work.  Return items that cannot be refinished in the field to the factory, make required alterations, and refinish entire unit or provide new units.

F. Protect galvanized and nonferrous-metal surfaces from corrosion or galvanic action by applying a heavy coating of bituminous paint on surfaces that will be in contact with concrete, masonry, or dissimilar metals.

G. Install concealed gaskets, flashings, joint fillers, and insulation as louver installation progresses, where weathertight louver joints are required.  Comply with Division 7 Section "Joint Sealants" for sealants applied during louver installation.

H. Louvers and sill flashings shall be installed in accordance with the manufacturer’s recommended procedures to ensure complete water integrity performance of the louver system.

3.04 ADJUSTING AND CLEANING

A. Clean exposed surfaces of louvers and vents that are not protected by temporary covering, to remove fingerprints and soil during construction period.  Do not let soil accumulate until final cleaning.

B. Before final inspection, clean exposed surfaces with water and a mild soap or detergent not harmful to finishes.  Thoroughly rinse surfaces and dry.

C. Restore louvers and vents damaged during installation and construction so no evidence remains of corrective work.  If results of restoration are unsuccessful, as determined by Architect, remove damaged units and replace with new units.

D. Touch up minor abrasions in finishes with air-dried coating that matches color and gloss of, and is compatible with, factory-applied finish coating.

END OF SECTION