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Rooftop, Mechanical Equipment, Composite Solution

System: BVTK

Rooftop Mechanical Equipment Barrier Wall and Acoustic Louver

Client

National telecommunications corporation in a residential area.

The Situation

The noise sources are twenty rooftop air cooled condenser units placed on the customer services building in a densely populated downtown residential area. Mid/hi frequency noise from the up-blast fans was emanating into the residential neighborhood.

Issues

Solutions

Advantages of Proposed Solution

Project Goals

NOISEBLOCK™ Applied Products

KNC model STL-4, NOISEBLOCK™ barrier panels were manufactured of 16 gage solid outer skin and 22 gage, perforated inner skin with acoustic grade fill suitable for outdoor exposure, all material galvanized steel, Type G90. The tongue and groove panel connections allowed for quick installation and inherent drainage of rain water. The structural steel components were supplied as assemblies with a factory hot-dipped, galvanized finish. All products are cost effective and backed by KNCís extensive, independently tested database and proven performance.

KNC model VAL/2, 6-inch deep acoustic louvers were used for the balance. The structural steel support system was designed to readily accept the acoustic louvers similar to the method used to install the NOISEBLOCK™ barrier panels. This common attachment methodology made efficient for the installer to complete the project.

The total outer barrier dimensions were 53.4 m (L) x 2.9 m (H), with suspended frames of NOISEBLOCK™ barrier panels of 1.2 m height above the up-blast fans, rising up to 3.9 m beyond the roof.

Resolution

The sound pressure levels measured after the installation complied with city noise ordinance. Noise attenuation of 9.0 dBA* was achieved at neighboring critical receiver points. Design airflow allowed for proper equipment operation. The time-line was met. The client and acoustical consultant praised the work and highly recommend KNC for future projects.

*Note: The human ear perceives a 10dBA reduction in sound as roughly halving the volume.

Resources

This case study features Kinetics NOISEBLOCK™ Sound Barrier Walls and Acoustical Louvers

Additional Information

For additional information e-mail industrialsales@kineticsnoise.com

Project Images

Inside, Close up, Acoustic Louver, Barrier Wall Aerial View of Barrier Wall