Can I move or cut a seismic cable to make my 45-degree offset fit?

Field answer

Seismic braces and cables are part of the building’s restraint system. They are not field clutter to move out of the way without approval.

If your 45° offset hits one, stop and recheck the path. You may be able to rotate adjustable elbows, change the travel piece, or reroute the duct around the brace, but the structural restraint stays controlled by approved layout and coordination.

What to check first

• Identify whose seismic brace or cable it is.
• Check whether it is under tension or connected to equipment.
• Do not loosen or move it without direction.
• Lay out an alternate offset path around the brace.
• Document the conflict for coordination if clearance is tight.

Why it matters

Altering seismic bracing can create a structural safety issue and fail inspection.

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Final direction belongs to the foreman, approved drawings/specs, manufacturer instructions, pressure/material schedule, employer policy, and AHJ/code requirements.