Static field route #19598

What do I do when an angled hanger strap is cutting on a 45-degree duct run?

Hanger Systems, Rods, Straps, Trapeze & Anchors🚨 STOP / VERIFYField answer expansion

📖 Verified core answer

Hangers should carry load cleanly without sawing on sharp metal. If a strap is angled and cutting on a flange, stop and rebuild the support with a proper vertical load path.

Open in Field Rescue Open category

Field verification checklist

Look for straps touching sharp flanges or raw edges.
Check whether the hanger is carrying load at an angle instead of straight down.
Inspect the strap for cuts, tears, or stretched holes.
Rebuild with a vertical rod/trapeze/saddle support if needed.
Hold the area if overhead support is questionable.

Ask foreman

The support strap on this sloped/45 run is pulling across a sharp flange and starting to cut. I stopped loading it. Do you want this rebuilt with rods and a trapeze support?

Text to foreman

Route options

A Correct it only if the fix is within your assignment and approved method.

B Hold and document if it affects pressure class, listed assembly, material spec, support load path, fire barrier, equipment, TAB, or another trade.

C Bring the foreman/detailer the location, what you checked, and what decision you need before sealing, testing, cover, or startup.

Do not do this

Do not leave a support strap rubbing across a sharp flange lip under load.

Why this matters

A cut hanger strap can fail overhead and drop duct, fittings, or hardware.

Final verification

Use this as field training guidance. Final direction still comes from the foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, pressure/material schedule, and AHJ/code requirements.

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