089119 - FIXED LOUVERS.doc

UNIT TRAININGEQUIPMENT SITE ADD/ALT

Copyright 2010 by The American Institute of Architects (AIA)

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

SECTION 089119 - FIXED LOUVERS

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

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

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

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes fixed, extruded-aluminum louvers.

1.2 ACTION SUBMITTALS

A. Product Data: For each type of product.

1. For louvers specified to bear AMCA seal, include printed catalog pages showing specified models with appropriate AMCA Certified Ratings Seals.

Retain "Delegated-Design Submittal" Paragraph below if design services have been delegated to Contractor.

B. Delegated-Design Submittal: For louvers indicated to comply with structural and seismic performance requirements, including analysis data signed and sealed by the qualified professional engineer responsible for their preparation.

1.3 INFORMATIONAL SUBMITTALS

Reports are generally unnecessary if product data bearing AMCA Certified Ratings Seal are required.

A. Product Test Reports: Based on tests performed according to AMCA 500-L.

Retain paragraph below if windborne-debris-impact resistance is required.

B. Windborne-debris-impact-resistance test reports.

PART 2 - PRODUCTS

See Editing Instruction No. 1 in the Evaluations for cautions about named manufacturers and products. For an explanation of options and Contractor's product selection procedures, see Section 016000 "Product Requirements."

2.1 PERFORMANCE REQUIREMENTS

Retain "Delegated Design" Paragraph below if Contractor is required to assume responsibility for design. Most louver manufacturers do not have an engineer on staff who is legally authorized to practice in the jurisdiction where Project is located. For this reason, deleting below is advisable unless using large louvers. If specifying large or structurally complex louvers and relying on manufacturer for information about their structural performance, below can be retained and louver manufacturer or Contractor can engage a local engineer to prepare the required calculations.

A. Delegated Design: Design louvers, including comprehensive engineering analysis by a qualified professional engineer, using structural and seismic performance requirements and design criteria indicated.

B. Structural Performance: Louvers shall withstand 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 normal to the face of the building.

Retain one of two "Wind Loads" subparagraphs below. If retaining first, indicate pressures on appropriate elevation Drawings. Requirements in second are examples only. Revise to suit Project. Consult a structural engineer to quantify design loads applicable to Project. Verify compliance with codes. See Evaluations.

1. Wind Loads: Determine loads based on a uniform pressure of 20 lbf/sq. ft, acting inward or outward.

Retain "Windborne-Debris-Impact Resistance" Paragraph below if required by Project. The IBC defines wind-borne-debris regions. Enhanced protection applies to essential facilities. Verify requirements of authorities having jurisdiction.

Revise "Seismic Performance" Paragraph below to indicate specific loads determined by Project's structural engineer or refer to loads indicated on Drawings. Model building codes and ASCE/SEI 7 establish criteria for buildings subject to earthquake motions. Verify requirements with structural engineer.

C. Seismic Performance: Louvers, including attachments to other construction, shall withstand the effects of earthquake motions determined according to ASCE/SEI 7.

Design earthquake spectral response acceleration, short period (Sds) is determined by Project's location and site classification. This information is usually provided in structural notes on Drawings.

1. Design earthquake spectral response acceleration, short period (Sds) for Project is 0.20 Component Importance Factor is generally 1.0 unless the structure is in Seismic Use Group III and louver is necessary for continued operation of facility or failure of louver could impair continued operation of facility, in which case the Component Importance Factor is 1.5.

2. Component Importance Factor: 1.0.

Delete "Louver Performance Ratings" Paragraph below and performance ratings in Part 2 if louvers are sufficiently oversized that performance is not critical.

D. Louver Performance Ratings: Provide louvers complying with requirements specified, as demonstrated by testing manufacturer's stock units identical to those provided, except for length and width according to AMCA 500-L.

2.2 FIXED, EXTRUDED-ALUMINUM LOUVERS

Copy paragraphs below and re-edit for each product.

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

A. Horizontal, Drainable-Blade Louver:

Retain "Manufacturers" Subparagraph and list of manufacturers below to require products from manufacturers listed or a comparable product from other manufacturers.

1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

Retain "Basis-of-Design Product" Subparagraph and list of manufacturers below to identify a specific product or a comparable product from manufacturers listed. Retain option and delete insert note if manufacturer's name and model number are indicated on Drawings.

a. American Warming and Ventilating; a Mestek company.

b. Greenheck Fan Corporation.

c. Ruskin Company; Tomkins PLC.

Requirements in first three subparagraphs below are based on products available from listed manufacturers. Revise to suit Project.

2. Louver Depth: 4 inches.

Insert descriptive requirements below that relate to appearance, such as blade spacing and angle, if required. If inserting such requirements, verify that louvers are available that comply with these requirements and with performance requirements selected.

3. Frame and Blade Nominal Thickness: Not less than 0.060 inch for blades and 0.080 inch for frames.

4. Louver Performance Ratings:

Requirements for free area, point of beginning water penetration, and air performance in three subparagraphs below are based on products available from listed manufacturers. If more than one choice is given for a requirement, the most lenient choice allows many products in the category to comply, resulting in competitive pricing; the most restrictive choice limits products to high-performance designs, potentially with higher costs.

a. See drawings for performance requirements.

2.3 LOUVER SCREENS

Retain one of two options in "General" Paragraph below. If retaining second option, indicate locations on Drawings.

A. General: Provide screen at each exterior louver.

Retain applicable requirements in "Screen Location for Fixed Louvers" and "Screening Type" subparagraphs below to suit louver locations, types, and functions. See Evaluations.

1. Screen Location for Fixed Louvers: Interior face.

The International Mechanical Code requires that openings in louvers or screens for exhaust openings or intake openings in residential occupancies be 1/4 to 1/2 inch (6 to 12 mm); for intake openings in nonresidential occupancies, 1/4 to 1 inch (6 to 25 mm).

2. Screening Type: Bird screening.

B. Louver Screen Frames: Same type and form of metal as indicated for louver to which screens are attached.

If more than one screen type is required, coordinate selection with Drawings and with mechanical engineer for required percentage of open area. Retain one of three louver screening paragraphs below for louver material selected. Delete all three if manufacturer's standard screening is acceptable.

C. Louver Screening for Aluminum Louvers:

Retain one or more of three "Bird Screening" subparagraphs below, or insert another mesh or wire size.

1. Bird Screening: Aluminum, 1/2-inch-square mesh, 0.063-inch wire.

Insert other screening materials as required, including bronze and glass fiber.

2.4 MATERIALS

A. Aluminum Extrusions: ASTM B 221, Alloy 6063-T5, T-52, or T6.

B. Fasteners: Use types and sizes to suit unit installation conditions.

First option in first subparagraph below specifies flush heads; second option specifies raised heads.

1. Use Phillips flat-head screws for exposed fasteners unless otherwise indicated.

2. For fastening aluminum, use aluminum or 300 series stainless-steel fasteners.

3. For fastening galvanized steel, use hot-dip-galvanized steel or 300 series stainless-steel fasteners.

4. For color-finished louvers, use fasteners with heads that match color of louvers.

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

2.5 FABRICATION

A. 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.

B. Join frame members to each other and to fixed louver blades with fillet welds unless otherwise indicated or size of louver assembly makes bolted connections between frame members necessary.

2.6 ALUMINUM FINISHES

Retain finishes in paragraphs below to suit Project. If retaining more than one, indicate location of each on Drawings or by inserts.

Retain one of two options in "Clear Anodic Finish" Paragraph below. Class II finish is standard with many manufacturers; Class I finish is heavy anodized. Verify availability with manufacturers.

Retain one of two "High-Performance Organic Finish" paragraphs below; if both are required, indicate location of each system on Drawings, in schedules, or by inserts. Retain AAMA 2604 or AAMA 2605 for high- or superior-performance organic coatings, respectively, on extrusions and panels. If specific products are required, name coating manufacturers and products.

A. High-Performance Organic Finish: Two-coat fluoropolymer finish complying with AAMA 2604 and containing not less than 50 percent PVDF resin by weight in color coat. Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.

1. Color and Gloss: As selected by Architect from manufacturer's full range.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Locate and place louvers 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. Provide perimeter reveals and openings of uniform width for sealants and joint fillers, as indicated.

D. Protect unpainted galvanized and nonferrous-metal surfaces that are in contact with concrete, masonry, or dissimilar metals from corrosion and galvanic action by applying a heavy coating of bituminous paint or by separating surfaces with waterproof gaskets or nonmetallic flashing.

3.2 ADJUSTING

A. Restore louvers 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.

END OF SECTION 089119

Project No: 390265

FIXED LOUVERS

089119 - 1