VMC Group CPF Fan and Motor Inertia Bases are concrete pouring forms consisting of structural channel perimeter frame, reinforcing steel, equipment mounting templates with anchor bolts and open spring isolators with height saving brackets. Spring deflections of 1" - 5" are available. CPF Fan and Motor Inertia Bases are designed for use in fan arrangements of 2, 3, 4, 9 and 10, single width or double width configurations. CPF Fan and Motor Inertia Bases are available in various thicknesses depending on the customer requirements. When CPF Fan and Motor Inertia Bases are filled with concrete, they become an inertia base and provide an effective means to isolate vibration and limit the motion of fans.

CPF Fan and Motor Inertia Bases are rectangular in size and are engineered to support fan bases. The isolator housings are outboard with the perimeter of the inertia base.

Features & Benefits

  • Various deflections available
  • For use with multiple single or double width fan arrangement
  • Available in various thicknesses based on customer requirements


  • Fans


Spec Sheets

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The engineers we employ hold the highest industry-recognized credentials in structural analysis, elastomer development and system dynamics.


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We are the only ISO 17025:2005 Accredited Seismic Simulation Test Laboratory with a triaxial shake table owned and operated by California licensed Structural engineers.

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In partnership with Greenberry Industrial, we now offer testing services that meet the requirements of ASME NQA-1.

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