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Apprentice answer

Is one sheet metal screw enough to hold a duct hanger strap

1st YearForeman Skills & Jobsite ProductivityStop and get direction

One small screw into duct skin is not a safe hanger attachment. Stop loading it and refasten by the approved hanger/support detail.

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Plain-English answer

A hanger strap attached with one short screw can tear out, strip, or unzip the sheet metal under load.

Support the run, check all similar straps, and refasten using the approved quantity/type of fasteners, backing, washers, bolts, or structural support method for that duct and load.

Ask Foreman

This hanger strap at [location] is held by one small screw into duct skin. I stopped loading it. Do you want the straps refastened per approved support detail across this run?

Verify before acting

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

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