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DocuSign Envelope ID: 9826C043- 4C32- 49CD- A4CC- DC28ABAB7CE7 <br />SECTION 239116 — NON -METAL DUCTS <br />a. Vertical supports are Galvanized steel with available lengths of 5'(standard), 10', 15', <br />& 30'. <br />6. Available for diameters from 8" — 84 ". <br />7. Not available for natatorium applications. <br />B. TEXTILE <br />1. Verona <br />a. Textile Construction: Filament /filament twill polyester, fire retardant in accordance <br />with UL 2518. <br />b. Air Permeability: 2 ( +2/ -1) CFM /ft2 per ASTM D737, Frazier <br />c. Weight: 6.8 oz. /yd2 per ASTM D3776 <br />d. Warranty: 15 years with standard inlet velocity. <br />2. Textile Color (by Owner/ Architect) <br />a. Standard: blue, white, tan, red, green, silver, black <br />b. Custom <br />C. SOUND ATTENUATOR(OPTIONAL) <br />1. Test reports: The laboratory method used in conduction these tests in accordance with ASTM <br />Standard E477 -2013. Sound pressure level data obtained using a Bruel and Kjar Pulse Ana- <br />lyzer. <br />2. Acoustical performance data must be submitted for both dynamic insertion loss and generat- <br />ed noise values for octave band frequencies from 63Hz to 8000Hz. <br />3. All sound testing to be completed by a NVLAP acoustical testing service accredited third party <br />laboratory. <br />4. Material meets the flame and smoke development of NFPA 90 -A of < than 25 flame and <50 <br />smoke development when tested in accordance with ASTM E84. <br />5. System shall include full 360 degree tension rings with quick connection spacer tubes con- <br />cealed inside the fabric attenuator. <br />6. Cylindrical ring on each side shall require a vertical metal to metal cable safety attachment. <br />7. Available for diameters from 12" — 30 ". <br />8. Attenuator to have a 5 year warranty. <br />9. Shop drawings to include thickness, pressure losses, and connection details. <br />10. Available with and without a bullet. <br />11. Fabric on outer shell of attenuator to match DuctSox. <br />12. With a bullet. Based on a 24" diameter by 52" length with bullet, the minimum acoustical data <br />must be met: minimum data for DIL and maximum for GN. <br />a. Performance <br />1. Direction: Forward Flow ( +) <br />2. Dynamic Insertion Loss <br />3. Generated Noise <br />PERFORMANCE <br />Direction: Forward Flow ( +} <br />Dynamic Insertion Loss (dB) <br />Z7 — <br />62 <br />yLL <br />� r <br />Generated Noise L. (dB; 10-Y2 Watts) <br />FPM Static Pressure Drop <br />1500 0.14 iwg O a <br />750 0.03 iwg <br />7 <br />Octave Band Center Frequency (Hz) <br />— 63 <br />125 <br />250 <br />500 <br />1000 <br />2000 <br />4000 8000 <br />1500 <br />750 <br />Octave Band Center Frequency (Hz) <br />13. Without a bullet. Based on a a 24" diameter by 52" length without a bullet, the minumum <br />acoustical data must be met: minimum data for DIL and maximum for GN. <br />a. Performance <br />1. Direction: Forward Flow ( +) <br />2. Dynamic Insertion Loss <br />Reece, Noland & McElrath, Inc. 239116-2 Orange County Board of Elections <br />Orange Co., NC 05/04/18 <br />