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The good engineering practice stack height is commonly taken as

  • A.Five times the building width
  • B.Building height plus 1.5 times the lesser dimension
  • C.Twice the building height
  • D.The building height alone

Answer: B

Correct answer: Building height plus 1.5 times the lesser dimension

The good engineering practice height is

\[ H_{GEP} = H_b + 1.5 L \]

where \(H_b\) is the building height and \(L\) the lesser of the building’s height and its projected width. The point is to place the release above the wake cavity the building generates, not to license dispersion by height alone.

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