Static field route #48

What do I do when not understanding dashed/hidden lines for duct above/below?

Print Reading, Tags & LayoutFoundation print-reading starter — verify latest revision/detail

Dashed lines can mean hidden/above/below, existing, demo, future, or another drawing convention. The legend controls — but if the legend is unclear, ask before installing from the line style alone.

Open in Field Rescue Open category

Field checklist

Find the line type legend on the sheet or general notes.
Check whether dashed means hidden/above/below, existing, demo, future, or centerline on this set.
Trace the dashed run to solid connections, notes, demo clouds, or section markers.
Compare mechanical plan to demo plan, RCP, and sections if needed.
Ask before treating a dashed line as new duct to install.

Ask foreman

What does this dashed/hidden line mean on this sheet?

Do not

Do not treat dashed lines like visible duct without checking the legend.

Why it matters

Line styles are not universal. One job’s dashed line may be existing duct; another job’s dashed line may be hidden duct above a ceiling.

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