|
SECTION 10200
WALL LOUVERS
PART 1 GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions
of the Contract, including General and Supplementary Conditions and
Division 1 Specification
Sections, apply to this Section.
1.2 SUMMARY
A. This section includes the
following:
1. Fixed, drainable
extruded-aluminum louvers.
B. Related Section:
1. Division 7 - Sealants.
2. Division 9 - Painting for
field painting of louvers.
3. Division 15 - Mechanical
Work.
Retain reference to
electrical controls if specifying louvers with electric operators.
4. Division 16 - Electrical
controls.
1.3 DEFINITIONS
A. Louver Terminology: Definitions
of terms for metal louvers contained in AMCA (Air Movement and
Control Association) 501 apply
to this section unless otherwise defined in this section or in reference
standards.
B. Standard Free Area: Free Area
of a louver 48 inches 1220 mm) wide by 48 inches (1220 mm) high,
identical to that provided.
C. Maximum Standard Airflow:
Airflow at point beginning water penetration through a louver 48 inches
(1220 mm) wide by 48 inches
(1120 mm) high, identical to that provided.
D. Drainable-Blade Louver: Louver
designed to collect and drain water to exterior at sill by means of gutters
in front edges of blades and
channels in jambs and mullions.
1.4 PERFORMANCE REQUIREMENTS
A. Structural Performance: Provide
exterior metal louvers capable of withstanding the effects of loads and
stresses from wind and normal
thermal movement without evidencing permanent deformation of louver
components including blades,
frames, and supports; noise or metal fatigue caused by louver blade
rattle or flutter, or permanent
damage to fasteners and anchors.
Wind Load: Design
Load: Louvers shall be designed for a minimum wind pressure as indicated on the
Contract Drawings. If no design pressure is
indicated, minimum design pressure shall be 75 PSF (±).
2. Thermal Movements:
Provide louvers that allow for thermal movements resulting from the following
maximum change (range) in
ambient and surface temperatures by preventing buckling, opening of
joints, over stressing of
components, and other detrimental effects.
Temperature Change
(Range): 120 deg F (67 deg C), ambient, 180 deg F (100 deg C) material surfaces.
B. Air-Performance,
Water-Penetrations, and Air-Leakage Ratings: Provide louvers complying with
performance
requirements indicated as
demonstrated by testing American Warming and Ventilatings's stock units 48
inches (1220 mm) wide by 48
inches (1220 mm) high. In accordance with the most current AMCA Standard
500.
C. Comply with Miami-Dade County Hurricane
Impact Protocols PA- 201, PA 202, PA 203, and with the Florida Building Code
protocols TAS 201, TAS 202, TAS 203.
1.5 SUBMITTALS
A. Product Data: For each type of
product specified.
B. Shop Drawings: For louver units
and accessories. Include plans, elevations, sections, and details showing
profiles, angles, and spacing
of louver blades. Show unit dimensions related to wall openings and
construction
and profiles of frames at
jambs, heads and sills, and anchorage details and locations.
1. For installed louvers and
vents indicated to conply with design loadings, include structural analysis
data signed and sealed by
a qualified professional engineer responsible for their preparation.
C. Samples for Initial Section:
American Warming & Ventilating's color charts showing the full range of colors
available for units with
factory applied color finishes unless custom colors are called for in Parapraph
2.12
in which case provide samples
per paragraph 1.5.
D. Samples for Verifications: Of
each type of metal finish required, prepared on samples of same thickness and
material indicated for final
work. Where finishes involve normal color and texture variations, include
sample sets showing the full
range of variations expected.
E. Product Certificates: Signed by
American Warming and Ventilating certifying that the finished products comply
with requirements and are
licensed to bear the AMCA seal based on tests made according to AMCA 500 and
complying with AMCA's Certified
Ratings Program.
F. Product Test Reports: Furnish Proof
Certificates of Compliance with Miami-Dade County Hurricane Impact Protocols
PA- 100, PA 200, PA 300, and compliance with the Florida Building Code.
G. Qualification Data: For firms
and persons specified in "Quality Assurance" article to demonstrate their
capabilities and experience.
Include lists of completed projects with project names and addresses, names
and addresses of architects and
owners, and other information specified.
1.6 QUALITY ASSURANCE
A. Professional Engineer
Qualifications: A professional engineer who is legally qualified and who is
experienced
in providing engineering
service of kind indicated. Engineering services are defined as those performed
for
installations of louvers that
are similar to those indicated for this project in material, design, and extent.
B. Source Limitations: Obtain
louvers and vents from a single source manufacturer where alike in one or more
respects regarding type,
design, and factory applied color finish.
C. SMACNA Standard: Comply with
SMACNA's "Architectural Sheet Metal Manual" recommendations for
fabrication, construction
details, and installation procedures.
D. AMCA ratings Seals: Louvers
shall bear AMCA Licensed Ratings Seals for Air Performance, Water
Penetration and Air Leakage
Ratings.
1.7 PROJECT CONDITIONS
A. Field Measurements: Verify
louver openings by field measurements before fabrication and indicate
measurements on shop drawings. Coordinate fabrication schedule with construction progress to avoid
delaying the work.
1. Establishing Dimensions:
Where field measurements cannot be made without delaying the work, the
general contractor shall
establish opening dimensions allowing the manufacturer to proceed with
fabricating louvers
without field measurements. Coordinate construction to ensure that actual
opening dimensions
correspond to established dimensions.
PART 2 PRODUCTS
2.1 MANUFACTURER
A. Manufacturers: Subject to
compliance with requirements, provide products manufactured by the following:
1.
American Warming and Ventilating, Inc.,
NOA No.03-1001.01, C/O
Savannah Trims, Inc.
Phone: 888-640-0850, Fax: 561-656-2599, or,
subject to compliance with these specifications, additionally approved are
Air Balance, Inc., CESCO Products, or Louvers and Dampers, Inc., Ruskin.
B. Subject to compliance with
requirements, other manufacturers products may be incorporated into
the work if Pre-approved. Request for
pre-approval must be issued at least 10 days prior to bid date.
.
2.2 MATERIALS
A. Aluminum Extrusions: ASTM B
221, alloy 6063-T5.
B. Fasteners: Of same basic metal and
alloy as fastened metal unless otherwise indicated. Do not use metals
that are corrosive or
incompatible with materials joined.
1. Use types, gauges, lengths
to suit unit installation conditions.
2. Use hex-head screws for
exposed fasteners unless otherwise indicated.
C. Anchors and Inserts: Of type,
size and material required for type of loading and installation indicated. Use
nonferrous metal or hot-dip
galvanized anchors and inserts for exterior installations and elsewhere as
required
for corrosion resistance. Use
toothed steel or expansion bolt devices for drilled-in-place anchors.
D. Bituminous Paint: Cold-applied
asphalt mastic complying with SSPC-Paint 12 but containing no asbestos
fibers, or cold-applied asphalt
emulsion complying with ASTM D 1187.
2.3 FABRICATION, GENERAL
A. Assemble louvers in factory to
minimize field splicing and assembly. Disassemble units as necessary for
shipping and handling
limitations.
B. Maintain equal louver blade
spacing, including separation between blades and frames at head and sill, to
produce uniform appearance.
C. Fabricate frames, including
integral sills, to fit in openings of sizes indicated, with allowances made
for fabrication and
installation tolerances, adjoining materials tolerances, and perimeter sealant
joints.
D. Include supports, anchorage, and
accessories required for complete assembly.
E. Provide vertical mullions of
type and at spacings indicated, but not more than recommended by manufacturer,
or 96 inches (2438 mm) on
center, whichever is less. At horizontal joints between louver units, provide
horizontal mullions, unless
continuous vertical assemblies are indicated.
Blade Support Angle: Panels
over 60 inches wide shall have a 1-1/2" x 1-1/2" x 1/8" vertical interior blade
support angle at approximate
center of panels.
F. Join frame members to one another
and to fixed louver blades with #8 x 3/4" stainless steel or
aluminum sheet metal screws
unless otherwise indicated or size of louver assembly makes bolted connections
between frame members
necessary.
2.4 FIXED, EXTRUDED-ALUMINUM
LOUVERS
A. Louver Construction: Provide
fixed-blade louvers with extruded-aluminum alloy 6063-T5 frames and blades.
B. Horizontal Louvers: Either
drainable or non-drainable blade type complying with the following:
C. Horizontal, Drainable-Blade
American Warming Louver Model LE-32: As follows:
1. Louver Depth: 6 inches (152
mm).
2. Frame .125 inch thick Aluminum
3. Blades .081 inch thick Aluminum
4. Blade Angle and Spacing: 35° and 4 inch
spacing.
5. AMCA Performance Requirements:
Water Penetration: Less
than .01 oz. (3.0 g.) at 1250 fpm (6.35 m/s) recommended free area velocity.
Pressure Drop: .21 in.
w.g. (52.1 Pa) at 1250 fpm (6.35 m/s) and 11550 SCFM (5.45 scm/s).
Free Area: 9.24 sq. ft.
(0.858 sq. m.) = 58% for 48" x 48" (1.22 m x 1.22 m) test size.
7.
AMCA Seal: Mark units with AMCA Certified
Ratings Seal.
8. Miami-Dade County Building Code Requirements:
1.
Product Control Notice of Acceptance # 03-0430.03
2.
Meet Florida Building Code Testing: TAS 201, TAS 202, TAS 20
3.
Design Load: Design Load: Louvers shall be designed for a minimum wind
pressure as indicated on the Contract Drawings. If no design pressure is
indicated, minimum design pressure shall be 75 PSF (±).
4.
Labeling: Mark all units,
“Miami-Dade County Product Control Approved”
2.5 LOUVER SCREENS
A. General: Provide each exterior
louver with screens complying with the following requirements:
1. Screen is to be mounted on
interior unless otherwise indicated.
B. Secure screen to louver frames
with stainless steel machine screws at each corner and spaced at 18" (457 mm)
O.C. between.
C. Louver Screen Frames: Fabricate
screen frames to louver sizes indicated and comply with the following
requirements:
1. Metal: Same kind and form
of metal as indicated for louver frames to which screens are attached.
2. Finish: Same finish as
louver frames to which screens are attached.
3. Type: Non-rewireable
U-shaped frames for permanently securing screen mesh.
D. Louver Screening as follows:
1. Bird Screen .5 in .051
Expanded Alum
2.6 ALUMINUM FINISHES
A. Finish designations prefixed by
AA comply with system established by the Aluminum Association for
designating aluminum finishes.
B. Conversion-Coated Finish:
AA-C12C42 (Chemical Finish: cleaned with inhibited chemicals. Chemical
finish:
acid-chromate-fluoride-phosphate conversion coating.
C. High Performance Organic Coating
Finish: AA-C12C42R1x (Chemical Finish: cleaned with inhibited
chemicals. Chemical Finish:
acid-chromate-fluoride-phosphate conversion coating. Organic Coating: as
specified below.) Prepare,
pretreat, and apply coating to exposed metal surfaces to comply with coating and
resin manufacturer's written
instruction.
1. Fluoropolymer Two Coat
System: Manufacturer's standard thermocured system consisting of specially
formulated inhibitive
primer and fluoropolymer color topcoat containing not less than 70 percent
polyvinylidene fluoride
resin by weight, complying with AAMA 2605.
PART 3 EXECUTION
3.1 PREPARATION
A. General Contractor to coordinate
setting drawings, diagrams, templates, instruction, and directions for
installation of anchorages that
are to be embedded in concrete or masonry construction. General Contractor
to coordinate delivery of such
items to project site.
3.2 INSTALLATION
A. Locate and place louver units
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
and required. Comply with Division 7 Section "Joint Sealants" for sealants
applied during louver installation.
3.3 ADJUSTING, PROTECTING, AND
CLEANING
A. Protect louvers and vents from
damage during construction. Use temporary protective coverings where needed
and approved by louver
manufacturer (AWV). Remove protective coverings at the time of Substantial Completion.
B. 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 the architect, remove damaged units and
replace with new units.
1. Clean and touch up minor
abrasions in finishes with air-dried coating that matches color and gloss, and
is compatible with,
factory-applied finish coating.
C. Test operation of adjustable
louvers and adjust as needed to produce fully functioning units that comply
with requirements.
D. Periodically clean exposed surfaces
of louvers and vents that are not protected by temporary covering to
remove fingerprints and soil
accumulated during construction. Do not let soil accumulate until final
cleaning.
E. Before final inspection, clean
exposed surfaces with water and a mild soap or detergent not harmful to
finishes. Thoroughly rinse
surfaces and dry.
-END OF SECTION-
|
