Planning & EstimatingQuestion 281 of 360
A plan symbol showing a small circle with a bisecting line and the note "FD" most likely indicates what?
a.A fire damper
b.A floor drain
c.A flow detector
d.A foundation dowel
Explanation
"FD" on a plumbing plan denotes a floor drain, typically drawn as a small circle at the fixture location. Recognizing fixture abbreviations lets you route waste and vent piping to the correct point. Always verify the abbreviation against the plan's symbol legend, which governs that specific drawing set.
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