USACE / NAVFAC / AFCESA / NASA UFGS-08 91 00 (August 2008)
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Preparing Activity: NAVFAC Superceeding
UFGS-08 91 00 (April 2006)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 08 91 00
METAL [WALL] [AND] [DOOR] LOUVERS
08/08
NOTE: This guide specification covers the requirements for average metal wall
louvers, metal louvers in wood doors, screens and frames, and accessories.
Edit this guide specification for project specific requirements by adding, deleting,
or revising text. For bracketed items, choose applicable items(s) or insert
appropriate information.
Remove information and requirements not required in respective project, whether
or not brackets are present.
Comments and suggestions on this guide specification are welcome and should
be directed to the technical proponent of the specification. A listing of technical
proponents, including their organization designation and telephone number, is
on the Internet.
Recommended changes to a UFGS should be submitted as a Criteria Change Request
(CCR).
NOTE: For very large or special louvers and louvers subject to snow or seismic
loads, insert additional paragraphs as required.
NOTE: On the drawings, show:
1. Locations, sizes, and types of louvers.
2. Details of louver construction and installation, including subframes, sills,
and flashing.
3. Locations and arrangement of mullions.
4. Colors of factory-finished louvers, unless color is specified.
PART 1 GENERAL
1.1 REFERENCES
NOTE: This paragraph is used to list the publications cited in the text of
the guide specification. The publications are referred to in the text by basic
designation only and listed in this paragraph by organization, designation,
date, and title.
Use the Reference Wizard's Check Reference feature when you add a RID outside
of the Section's Reference Article to automatically place the reference in the
Reference Article. Also use the Reference Wizard's Check Reference feature
to update the issue dates.
References not used in the text will automatically be deleted from this section
of the project specification when you choose to reconcile references in the
publish print process.
The publications listed below form a part of this specification to the extent referenced. The publications are
referred to within the text by the basic designation only.
[AIR MOVEMENT AND CONTROL ASSOCIATION INTERNATIONAL (AMCA)AMCA 500-D(1998) Laboratory Methods of Testing Dampers for RatingAMCA 511(1999; R 2004) Certified Ratings Program for Air Control Devices][ALUMINUM ASSOCIATION (AA)AA DAF-45(2003) Designation System for Aluminum Finishes][AMERICAN ARCHITECTURAL MANUFACTURERS ASSOCIATION (AAMA)AAMA 2603(2002) Voluntary Specification, Performance Requirements and Test Procedures for Pigmented Organic Coatings on Aluminum Extrusions and PanelsAAMA 2604(2005) Voluntary Specification, Performance Requirements and Test Procedures for High Performance Organic Coatings on Aluminum Extrusions and PanelsAAMA 2605(2005) Voluntary Specification, Performance Requirements and Test Procedures for Superior Performing Organic Coatings on Aluminum Extrusions and PanelsAAMA 611(1998) Voluntary Specification for Anodized Architectural Aluminum][ASTM INTERNATIONAL (ASTM)ASTM A 167(1999; R 2004) Standard Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and StripASTM A 366/A 366M(1997e1) Standard Specification for Commercial Steel, Sheet, Carbon,(0.15 Maximum Percent Cold-RolledASTM A 653/A 653M(2008) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip ProcessASTM B 209(2007) Standard Specification for Aluminum and Aluminum-Alloy Sheet and PlateASTM B 209M(2007) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric)ASTM B 221(2008) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and TubesASTM B 221M(2007) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes (Metric)]1.2 SUBMITTALS
NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL
PROCEDURES and edit the following list to reflect only the submittals required
for the project. Submittals should be kept to the minimum required for adequate
quality control.
A “G” following a submittal item indicates that the submittal requires Government
approval. Some submittals are already marked with a “G”. Only delete an existing
“G” if the submittal item is not complex and can be reviewed through the Contractor’s
Quality Control system. Only add a “G” if the submittal is sufficiently important
or complex in context of the project.
For submittals requiring Government approval on Army projects, a code of up
to three characters within the submittal tags may be used following the "G"
designation to indicate the approving authority. Codes for Army projects using
the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO"
for District Office (Engineering Division or other organization in the District
Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project
Office. Codes following the "G" typically are not used for Navy, Air Force,
and NASA projects.
Choose the first bracketed item for Navy, Air Force and NASA projects, or choose
the second bracketed item for Army projects.
Government approval is required for submittals with a "G" designation; submittals not having a "G" designation
are [for Contractor Quality Control approval.][for information only. When used, a designation following the
"G" designation identifies the office that will review the submittal for the Government.] The following shall
be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:
SD-02 Shop Drawings
Wall louvers
SD-03 Product Data
Metal Wall Louvers
SD-04 Samples
Wall louvers[; G][; G, [_____]]
Door louvers[; G][; G, [_____]]
1.3 DELIVERY, STORAGE, AND PROTECTION
Deliver materials to the site in an undamaged condition. Carefully store materials off the ground to provide
proper ventilation, drainage, and protection against dampness. Louvers shall be free from nicks, scratches,
and blemishes. Replace defective or damaged materials with new.
1.4 DETAIL DRAWINGS
Show all information necessary for fabrication and installation of wall louvers. Indicate materials, sizes, thicknesses,
fastenings, and profiles.
1.5 COLOR SAMPLES
Colors of finishes for wall louvers and door louvers shall closely approximate colors indicated. Where color
is not indicated, submit the manufacturer's standard colors to the Contracting Officer for selection.
PART 2 PRODUCTS
2.1 MATERIALS
2.1.1 Galvanized Steel Sheet
ASTM A 653/A 653M, coating designation Z275 G90.
2.1.2 Aluminum Sheet
ASTM B 209MASTM B 209, alloy 3003 or 5005 with temper as required for forming.
2.1.3 Extruded Aluminum
ASTM B 221MASTM B 221, alloy 6063-T5 or -T52.
[2.1.4 Stainless Steel
ASTM A 167, Type 302 or 304, with 2B finish.
]2.1.5 Cold Rolled Steel Sheet
ASTM A 366/A 366M, Class 1, with matte finish. Use for interior louvers only.
2.2 METAL WALL LOUVERS
NOTE: Louver free areas vary from 25 to 65 percent, depending on blade design.
When a certain free area is required, indicate blade type as well as louver
size. CAUTION: Even "weather-resistant" louvers will allow water penetration.
Quantity and velocity specified are for wall louvers in mechanical rooms and
similar locations. Where water penetration would be a problem, specify acceptable
quantity of water penetration at air velocity required, or provide operable
louvers or operable dampers to exclude wind-driven rain.
Weather resistant type, with bird screens and made to withstand a wind load of not less than [1.44] [_____] kilopascals
[30] [_____] pounds per square foot. Wall louvers shall bear the AMCA certified ratings program seal for air
performance and water penetration in accordance with AMCA 500-D and AMCA 511. The rating shall show a water
penetration of 0.06 kilograms or less per square meter 0.20 or less ounce per square foot of free area at a free
velocity of 244 meters 800 feet per minute.
2.2.1 Extruded Aluminum Louvers
Fabricated of extruded 6063-T5 or -T52 aluminum with a wall thickness of not less than 2 mm 0.081 inch.
2.2.2 Formed Metal Louvers
Formed of [zinc-coated] [stainless] steel sheet not thinner than 16 U.S. gage, or aluminum sheet not less than
2 mm 0.08 inch thick.
2.2.3 Mullions and Mullion Covers
NOTE: Large louvers may require bracing for given wind loads and with a maximum
deflection of L/180.
Same material and finish as louvers. Provide mullions [where indicated] [for all louvers more than 1500 mm 5
feet in width at not more than 1500 mm 5 feet on centers]. Provide mullions covers on both faces of joints between
louvers.
2.2.4 Screens and Frames
For aluminum louvers, provide 12.5 mm 1/2 inch square mesh, 1.8 or 1.5 mm 14 or 16 gage aluminum or 6 mm 1/4
inch square mesh, 1.5 mm 16 gage aluminum bird screening. For steel louvers, provide 12.5 mm 1/2 inch square
mesh, 2.5 or 1.5 mm 12 or 16 gage zinc-coated steel; 12.5 mm 1/2 inch square mesh, 1.5 mm 16 gage copper; or
6 mm 1/4 inch square mesh, 1.5 mm thick 16 gage zinc-coated steel or copper bird screening. Mount screens in
removable, rewirable frames of same material and finish as the louvers.
2.3 DOOR LOUVERS
[Inverted "Y"] [or] [Inverted "V"] sightproof type not less than 25 mm one inch thick with matching metal trim.
Louvers for exterior doors shall be weather resistant type.
2.3.1 Extruded Aluminum Door Louvers
Fabricate of 6063-T5 or -T52 aluminum alloy with a wall thickness of not less than 1.25 mm 0.050 inch thick.
Frames and trim shall be clamp-in "L" type.
2.3.2 Formed Metal Door Louvers
Fabricate of [0.9 mm thick20 U.S. gage steel sheet] [or] [sheet aluminum not less than 1.25 mm 0.050 inch thick].
Trim shall be beveled "Z" molding both sides.
2.3.3 Screens and Frames
For exterior doors, provide aluminum insect screens, 18 by 16 or 18 by 14 mesh. Mount screens in removable,
rewirable frames of same material and finish as the louvers.
2.4 FASTENERS AND ACCESSORIES
Provide stainless steel screws and fasteners for aluminum louvers and zinc-coated or stainless steel screws and
fasteners for steel louvers. Provide other accessories as required for complete and proper installation.
2.5 FINISHES
NOTE: Specify anodic and organic coatings as Contractor's option when these
finishes are determined to be available in similar colors an economically competitive
in the project area, unless the project requires use of one or the other to
match an existing condition.
2.5.1 Aluminum
Exposed aluminum surfaces shall be factory finished with an [anodic coating] [or] [organic coating]. [Color
shall be [____][as indicated].] Louvers [for each building] shall have the same finish.
2.5.1.1 Anodic Coating
NOTE: Specify Architectural Class I for harsh atmospheres where dust, gases,
salts, and other destructive elements will attack metal finish. Specify Architectural
Class II for all atmospheric conditions not requiring Class I.
Clean exposed aluminum surfaces and provide an anodized finish conforming to AA DAF-45 and AAMA 611. Finish
shall be:
[a. Architectural Class II (0.01 to 0.0175 mm0.4 mil to 0.7 mil), designation AA-M10-C22-[A31, clear
(natural)][A32, integral color][A34, electrolytically deposited color] anodized.]
[b. Architectural Class I (0.0175 mm0.7 mil or thicker), designation AA-M10-C22-[A41, clear (natural)][A42,
integral color][A44, electrolytically deposited color] anodized.]
2.5.1.2 Organic Coating
NOTE: When anodic and organic coatings are determined to be available in similar
colors and economically competitive in the project area, specify baked enamel
finish (AAMA 2603) as an option to Architectural Class II, anodic coating or
high-performance finish (AAMA 2605) as an option to Architectural Class I, anodic
coating. AAMA 2605 roughly equates to 70% resin polyvinylidene fluoride.
Clean and prime exposed aluminum surfaces. Provide a [baked enamel finish conforming to AAMA 2603, with total
dry film thickness not less than 0.02 mm 0.8 mil][high-performance finish in accordance with [AAMA 2604][AAMA 2605
] with total dry film thickness of not less than 0.03 mm1.2 mil], color [_____].
2.5.2 Steel
NOTE: Coordinate this finish with other exterior building components. If a
more durable finish is used on the building exterior or needed for weather resistance,
edit the finish coat to describe the paint system.
Provide factory-applied coating. Clean and phosphate treat exposed surfaces and apply rust-inhibitive primer
and baked enamel finish coat, 0.025 mm one mil minimum total dry film thickness, color [_____].
PART 3 EXECUTION
3.1 INSTALLATION
3.1.1 Wall Louvers
Install using stops or moldings, flanges, strap anchors, or jamb fasteners as appropriate for the wall construction
and in accordance with manufacturer's recommendations.
3.1.2 Door Louvers
Install louvers in wood doors by using metal "Z" or "L" moldings. Fasten moldings to door with screws.
3.1.3 Screens and Frames
Attach frames to louvers with screws or bolts.
3.2 PROTECTION FROM CONTACT OF DISSIMILAR MATERIALS
3.2.1 Copper or Copper-Bearing Alloys
Paint copper or copper-bearing alloys in contact with dissimilar metal with heavy-bodied bituminous paint or
separate with inert membrane.
3.2.2 Aluminum
Where aluminum contacts metal other than zinc, paint the dissimilar metal with a primer and two coats of aluminum
paint.
3.2.3 Metal
Paint metal in contact with mortar, concrete, or other masonry materials with alkali-resistant coatings such
as heavy-bodied bituminous paint.
3.2.4 Wood
Paint wood or other absorptive materials that may become repeatedly wet and in contact with metal with two coats
of aluminum paint or a coat of heavy-bodied bituminous paint.