Model VCR vibration isolation curbs are roof curbs with integral and adjustable spring vibration isolators. Standard spring deflections available are 1”, 2” and 3”. Galvanized steel construction with a wood nailing strip for attaching field supplied and applied flashing is standard. VCR curbs can be constructed with a sloped bottom to match the roof pitch. As airborne noise and vibration are usually a simultaneous concern, complete systems are available incorporating vibration isolation, duct-borne noise control, radiated noise control and flexible connections. This set-up yields a single source of responsibility for meeting occupied space noise criteria. Noise control elements are aerodynamically matched to the connections between the rooftop equipment and the ducting system to afford the lowest possible installed pressure drop and energy usage. We design VCR curbs with internal reinforcing to resist seismic and wind loading specific to the project requirements, and stamped engineering calculations are submitted for approval. Vibro-Acoustics has the application expertise to ensure noise control curbs are properly installed based on the unique requirements of each project.
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