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Apprentice answer

Where do I place the vibration isolators on a custom curb

3rd YearRoof Curbs, Louvers & Exterior AirCheck first

Spring or neoprene vibration isolators are installed directly along the top shelf perimeter track of the roof curb framing, sandwiched between the metal curb rail and the structural bottom base rails of the RTU chassis. This breaks the physical link, keeping mechanical motor hum from traveling down the building structure.

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Plain-English answer

Spring or neoprene vibration isolators are installed directly along the top shelf perimeter track of the roof curb framing, sandwiched between the metal curb rail and the structural bottom base rails of the RTU chassis. This breaks the physical link, keeping mechanical motor hum from traveling down the building structure.

Field checklist

Ask Foreman

Hey boss, I’m checking roof work & curbs: Where do I place the vibration isolators on a custom curb? I found the likely issue and want to verify the next step before I lock it in. Do you want me to adjust it now or check the drawing/detail first?

Verify before acting

Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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