Acoustic, Noise, Vibration & NVH Products worked example

Vibration Isolator Load Capacity at 58% target static utilization: a worked example

This worked example runs the vibration isolator load capacity numbers for a tougher week than the baseline: 58% target static utilization instead of the typical 80%. Estimate usable supported load from isolator rating, isolator count, static utilization, and installation derating.

The inputs for this scenario

  • Rated load per isolator: 350 lb / isolator (held at the documented default)
  • Number of isolators: 6 isolators (held at the documented default)
  • Target static utilization: 58 % (the input this scenario stresses; the baseline uses 80)
  • Installation derating: 95 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross isolator capacity = rated load per isolator × number of isolators.
  • Usable supported load works out to 1,157 lb supported at these inputs, and this is the headline figure for the scenario.
  • Gross isolator rating works out to 2,100 lb supported at these inputs.
  • Utilization reserve works out to 882 lb reserve at these inputs.
  • Installation derate works out to 60.9 lb derated at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target static utilization sits at 80% and the headline result is 1,596 lb supported, this scenario comes in 27.5% below the baseline at 1,157 lb supported.
  • Use it when selecting or verifying isolator quantity and size for a machine of known weight, or checking that an existing mount set is not overloaded. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Usable supported load: 1,157 lb supported (headline result)
  • Gross isolator rating: 2,100 lb supported
  • Utilization reserve: 882 lb reserve
  • Installation derate: 60.9 lb derated

Run it with your numbers

  • To rerun this with your own numbers, open the live Vibration Isolator Load Capacity calculator, set target static utilization to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.