������������������������ SECTION 09500
�������������������� ACOUSTICAL TREATMENT
PART 1� GENERAL
1.1 SECTION INCLUDES
��� A.� Sound absorptive ceiling panels.
��� B.� Sound absorptive wall panels.
��� C.� Miscellaneous accessories and trim.
1.2 RELATED SECTIONS
��� A.� Section 09511 - Suspended Acoustic Ceilings:� Conventional grid-supported acoustic ceilings.
��� B.� Section 15930 - Air Terminal Units.
��� C.� Section 16510 - Interior Luminaires.
1.3 REFERENCES
��� A.� ASTM C 423 - Standard Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method.
��� B.� ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building Materials.
1.4 PERFORMANCE REQUIREMENTS
��� A.� Sound Absorption:� Provide panels that are certified to meet the following minimum sound absorption for a 30 inch by 120 inch panel when tested in accordance with ASTM C 423:
������� 1.� 125 Hz:� 6.2 sabins.
������� 2.� 250 Hz:� 20.5 sabins.
������� 3.� 500 Hz:� 35.2 sabins.
������� 4.� 1000 Hz:� 34.5 sabins.
������� 5.� 2000 Hz:� 31.5 sabins.
������� 6.� 4000 Hz:� 33.1 sabins.
��� B.� Fire:� Provide panels that demonstrate the following performance when tested in accordance with ASTM E 84:
������� 1.� Flame spread:� 10 maximum.
������� 2.� Smoke density:� 5 maximum.
1.5 SUBMITTALS
��� A.� Submit in accordance with provisions of Section 01300.
��� B.� Product Data:� Submit manufacturer's recommended installation instructions and documentation certifying conformance with specified performance requirements.
��� C.� Shop Drawings:� Submit drawings indicating layout for all areas to receive work of this section, including locations of light fixtures, ceiling diffusers, and grilles.� Indicate pattern of units, cut units, details, and coordination requirements for work of other sections.
��� D.� Samples:� Submit for approval two samples of sound absorptive panel and suspension systems, not less than 12 inches by 18 inches in size and demonstrating colors, textures, and finishes that will be provided in the finished work.
1.6 QUALITY ASSURANCE
��� A.� Installer Qualifications:� Installers shall have demonstrated experience in assembly and installation of products similar to those specified in this section.
1.7 DELIVERY, STORAGE, AND HANDLING
��� A.� Deliver materials in manufacturer's original unopened and undamaged packages with labels legible and intact.�
��� B.� Store materials in unopened packages in a manner that will avoid damage from the environment and from construction operations.
��� C.� Handle in accordance with manufacturer's instructions.
1.8 ENVIRONMENTAL REQUIREMENTS
��� A.� Do not begin installation of acoustic panels until building has been enclosed and environmental conditions approximate interior conditions that will prevail when building is occupied.
PART 2� PRODUCTS
2.1 MANUFACTURERS
��� A.� Provide products as manufactured by Eckel Industries, Inc.; 155 Fawcett Street; Cambridge, Massachusetts 02138-9990.� Telephone:� 617-491-3221.� Fax:� 617-547-2171.
��� B.� Substitutions are not acceptable.
2.2 ACOUSTIC PANELS
��� A.� Provide Eckoustic Functional Panels with total area not less than 50 percent of gross ceiling area.
��� B.� Dimensions:� 30 inches wide by 5 foot, 6 foot, 8 foot, and 10 foot lengths as indicated on the Drawings.
��� C.� Panel Facings:� Aluminum sheet, 0.032 inch thick, perforated with 3/32 inch holes on 5/32 inch staggered centers;� vee-ridged on 6-inch centers to a depth of 3/4 inch.
��� D.� Framing:� 0.040 inch thick channel shaped aluminum transverse framing members.� For units 30 inches wide to 72 inches in length, provide two stiffening channels;� for units 96 inches in length, provide three channels.
��� E.� Fill:� 2 inch thick, fine fibered fibrous glass having a density of not less than 1.5 pounds per cubic foot, wrapped in a 2 mil flame guard polyethylene.
��� F.� Finish:� Natural aluminum finish.
��� G.� Finish:� Painted by manufacturer to match Architect's color sample.
��� H.� Finish:� ______________________.
2.3 MOUNTING COMPONENTS
��� A.� Brackets:� Provide four 10 gage 316 stainless steel brackets per unit for attachment to walls and ceilings, providing 4 inches of clearance between back of panel and substrate.�
��� B.� Anchors and Fasteners:� Provide aluminum fasteners for securing facing to framing members and for securing framing members to brackets;� provide corrosion-resistant anchors for fastening to substrate, as recommended by panel manufacturer and approved by Architect.
PART 3� EXECUTION
3.1 EXAMINATION
��� A.� Examine substrates to receive work of this section.� Do not begin installation until unsatisfactory conditions have been corrected.
3.2 INSTALLATION
��� A.� Install panels on walls and ceilings in locations and in patterns indicated on the Drawings.
��� B.� Install each unit as indicated on shop drawings and in accordance with manufacturer's printed instructions, using approved anchors and fasteners.
3.3 ADJUST AND CLEAN
��� A.� After installation of acoustic panels, clean all dirty or discolored surfaces, using cleaning materials and methods acceptable to manufacturer.� Replace damaged components as directed by the Architect.
��� B.� Remove debris caused by work of this section on a daily basis.� At completion of acoustic panel installation, remove all crates, cartons, packages, and debris from the project site.
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