GUIDE SPECIFICATIONS FOR 500HZ. LOW FREQUENCY
ACOUSTICAL PANELS
Section 09840 Acoustical Wall TreatmentPart 1 General:
1.1 Acoustical Treatments shall be provided by: Acoustical Resources, Inc. PO
Box 200504, Austin, TX 78720-0504, Phone (512) 259-5858 Fax: (512) 259-5850.
1.2 References:
A. ASTM C423-81a, Sound Absorption and Sound Absorption
Coefficients by the Reverberation Room Method.
B. ASTM E-84-81a, Surface Burning
Characteristics of Building Materials.
1.3 Delivery Storage & Handling
A. Deliver products to site, store and protect under provisions of Section 01600.
1.4 Submittals
A. Shop Drawings: Where custom sized
panels are indicated on architectural drawings, submit shop drawings with minimum
1/4" scale wall elevations and appropriate details indicating field dimensions, panel
layout, and installation methods.
B. Product Data: Submit manufacturer's
product data including specifications, installation instructions, test data, maintenance,
and warranty information.
C. Samples: Submit ______ (quantity)
samples (12" x 12") of each type of acoustical panel as shown on the drawings
and schedule.
1.5 Substitutions or changes will only be permitted per
Section 01600.
Part 2 Products
2.1 Materials:
E.1 500
hz. Low Frequency Absorber Series Panels shall be constructed of a single core construction
of dimensionally stable noncombustible, 2" thick 7 PCF density glass fiber board with
a non-perforated vinyl face. (Natatorium Application: totally
encapsulated in non-perforated vinyl (no exposed glass fiber board..
E.2 Panel Sizes: _____wide and _____high or as shown
on drawings. Standard maximum size is 48" wide x 120" high (nominal). (Natatorium
Application: maximum panel size is 43" wide x 48" in length). Custom or
larger sizes available; consult manufacturer. Panels are to be manufactured according to
field dimensions supplied by the installing contractor. Standard tolerances are
±1/16" in width and length.
E.3 Panel Edge Profile shall be Square.
Corner detail shall be Square. Edge Treatment shall be hardened.
E.4 Panel finish shall be:
_____________________________________(specify manufacturer, pattern and color).
Manufacturer's standard finish is a woven, 100% polyester fabric - Select from 40 standard
colors. (Natatorium Application: a 100% woven polyolefin fabric. Select
from 10+ standard colors). Finish shall be applied directly to the face and edges of the
panel and returned to the back of the panel to provide a full finished edge. All corners
are fully tailored.
E.5 Panel Mounting shall be: impaling clip
and adhesive, mechanical z-clip. Adhesive or other incidental materials are to be supplied
by the installing contractor. (Natatorium Application: aluminum
mechanical back-mounted z-clips and hook & loop fasteners.
E.6 Acoustical Performance Wall panels
shall have a minimum Sound Absorbtion Coefficient of 1.31 at the 500hz band frequency.
Sound absorption coefficient data to be in accordance with ASTM C-423-81a, Sound
Absorption Coefficents by the Reverberation Room Method.
Noise
Reduction Coefficient (N.R.C.) of 2" = .35 - .40 in accordance with ASTM C-423 - 81a,
Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method.
E.7 Flammability: All components utilized
in the construction of the wall panels shall have a Class "I" (0-25) rating in
accordance with ASTM E-84-81a, Surface Burning characteristics of Building Materials.
Part 3 Execution
3.01 Examination and Preparation:
A. Installation of acoustical panels shall
not begin until all wet work (plastering, concrete, etc.) is completed and dry. Building
shall be properly enclosed and under standard occupancy conditions (temperature of 60-85
degrees F. and not more than 80% relative humidity) before installation begins.
B. The contractor shall be responsible for
the examination and acceptance of all surfaces and conditions prior to the acoustical
panel installation.
3.02 Installation: Acoustical panels shall
be installed according to manufacturer's recommendations and instructions.
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SPECS: 500HZ. LOW FREQUENCY ACOUSTICAL PANELS
