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Apprentice Q&A · #157

What is a spreader bar, and when must I use one to lift an RTU?

4th YearRigging & EquipmentRED · Stop / Verify

A Spreader Bar is a rigid structural steel beam framework connected directly between the primary crane hook and the lifting slings. * You must use a spreader bar when lifting wide or fragile architectural RTU units to keep the lifting cables running perfectly vertical down to the equipment chassis lifting lugs. Without a spreader bar, the diagonal tension strings will pull inward, crushing the top sheet metal panels and destroying the internal coils.

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Plain-English answer

A Spreader Bar is a rigid structural steel beam framework connected directly between the primary crane hook and the lifting slings. * You must use a spreader bar when lifting wide or fragile architectural RTU units to keep the lifting cables running perfectly vertical down to the equipment chassis lifting lugs. Without a spreader bar, the diagonal tension strings will pull inward, crushing the top sheet metal panels and destroying the internal coils.

Field checklist

Ask Foreman

Hey boss, I’m on rigging & equipment and need verification before I touch this: What is a spreader bar, and when must I use one to lift an RTU? Do you want me to stop here and check the approved detail, submittal, or inspector/manufacturer requirement first?

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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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