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A tapered joint between two duct sizes.
Also known as: Duct taper symbol, Duct reducer symbol
The services drawing symbol for a change of duct size or shape, drawn as a taper between two runs.
Marks a change of duct size or shape on a services drawing.
Contexts: Technical drawing
Is drawn at its true length because a transition that is too abrupt causes turbulence, so the drawing records a dimension that matters to how the system performs.
Contexts: Technical drawing
A short tapered outline joining a wider double line to a narrower one.