Opinion: Overflow drains and scuppers

Inquiry:

00-09

Subject:

Overflow drains and scuppers

Code:

UBC 1506.3 Overflow drains and scuppers

Submitted By:

MN B.O. Uniformity Committee

Approved By:

Thomas R. Joachim, State Building Official

Issue Date:

January 12, 2000

Question:

Does the code permit a single overflow scupper to serve more than one roof drain?

Answer:

Yes, providing the scupper is sized to accommodate more than one roof drain.

Comments:

"The reason for having an overflow is to lessen the change of roof collapse due to accumulated water if the regular drain is clogged by leaves or other debris."