Static field route #18801

What do I do when a radius elbow hits a structural beam?

Coordination, Clashes, Sequencing & Rework📐 PERFORMANCE / COORDINATION CHECKV188 answer-gap expansion

📖 Verified core answer

Do not smash, flatten, or force the radius elbow into the beam. Verify the conflict location, measure the available space, then bring the foreman/detailer real options before changing the fitting shape.

Open in Field Rescue Open category

Field verification checklist

Confirm the latest drawing, detail, and revision for that run.
Measure the beam location, duct size, available throat/heel space, and downstream equipment served.
Check whether the conflict is structure, hanger elevation, wrong fitting, wrong layout, or missed coordination.
Take a wide photo and a close photo with grid/elevation marked.
Bring options instead of guessing: revised elbow, offset, transition, split duct, or approved vane detail.

Ask foreman

The radius elbow at [grid/elevation] hits the beam by about [amount]. I checked the latest drawing and measured the available turn space. Do you want a revised elbow, offset/transition, split route, or approved square elbow/vane detail before I install it?

Text to foreman

Route options

AMake the small field correction only if it is within your assignment and the approved method.

BHold and document the condition if the fix affects airflow, access, life safety, pressure class, rated assemblies, equipment, or another trade.

CBring the foreman/detailer the location, what you checked, and what decision you need before cover, startup, or rework.

Do not do this

Do not flatten, notch, smash, or change the elbow type on your own just to make the duct fit around steel.

Why this matters

A forced elbow can choke airflow, create turbulence, make TAB harder, and bury a coordination problem that should be fixed before cover.

Verification basis

Approved drawings/specs, project coordination drawings, manufacturer instructions/submittals, shop standards, foreman/detailer direction, employer policy, and AHJ/code requirements.