VMC Group Fan-Spring Flex & Motor Bases are structural steel angle iron or channel rectangular bases with motorslide rails and open spring isolators with 1" or 2" deflection. Custom deflections are also available upon request.

VMC Fan-Spring Flex & Motor Bases are designed for use with arrangement 1, 2 & 3 single width or double width fans with belt-driven motors. Bases can be fabricated without motor sliderails for use in other fan arrangements that do not have an integral base. VMC Group Fan Spring-Flex & Motor Bases help maintain proper drive alignment and resist starting torque without the use of restraining snubbers.

When an equipment submittal drawing is provided to the VMC Engineering Services division, a properly designed base or rail drawing, indicating isolator model numbers is produced for customer approval. Once approved, drawings are provided to our manufacturing department for fabrication and shipment.

Features & Benefits

  • Multiple and custom deflections available
  • Unitized base with integral motorslide rails
  • For use with multiple single or double width fans


  • Fans




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


We are the first ISO accredited PCA ISO-17065, third-party certification body for special seismic certification of non-structural building components and their mounting configurations by the ICC’s International Accreditation Service.

Test & Measurement

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.

Testing Services Update
DCL now offers Nuclear Qualification and Testing services.

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

Call for more information.