Static field route #19588

What do I do when a 45-degree offset travel piece was cut to the flat distance and falls short?

Measuring, Field Verification & Layout Marks✅ LEARN / STANDARD FIXField answer expansion

📖 Verified core answer

A 45° offset travel piece follows the diagonal path, not the flat throw. Use the 45° multiplier, then subtract the fitting takeoffs before cutting the spool.

Open in Field Rescue Open category

Field verification checklist

Measure the actual offset throw, not the guessed gap.
Use the 45° multiplier for the diagonal travel path.
Subtract approved fitting takeoffs or center-to-face dimensions.
Confirm the duct still lands on the next centerline before cutting.
Dry-fit or mark the spool before sealing the run.

Ask foreman

I measured the offset at [measurement], but the first spool was cut to the flat throw and landed short. I recalculated the 45° travel path and fitting takeoffs. Do you want me to recut the travel piece to that layout?

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 cut the travel spool to the flat offset distance and expect a 45° offset to land correctly.

Why this matters

Bad offset math wastes material, shifts the downstream run, and creates extra rework around obstructions.

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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