Confusing duct offsets shown on plan vs real ceiling space

A plan offset is not proof the offset fits in the ceiling. Verify real space, elevation, and the working length before layout.

Stop if

• This offset is shown on plan, but the real space is tight. Do you want a revised route/detail?

Watch out

• Do not build the drawn offset blindly when the ceiling space is different.

Check

• Find the offset on plan and section.
• Check available length in the field.
• Compare with ceiling, beams, sprinkler, cable tray, lights, and insulation.
• Use the offset calculator if needed.
• Ask if the offset would be too tight or ugly.

Steps

• Find the offset on plan and section.
• Check available length in the field.
• Compare with ceiling, beams, sprinkler, cable tray, lights, and insulation.
• Use the offset calculator if needed.
• Ask if the offset would be too tight or ugly.

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