I have a project where there are existing sprinklers under soffits approximately 18" off the wall. The bottom of the soffits is 10 ft and the ceiling in the rest of the space is 15 ft. The space is being renovated with the high sprinklers being relocated and the sprinklers under the soffits remaining. Normally I would include the sprinklers under the soffits as part of the hydraulic calculation, but based on the pipe sizes (and the preliminary calcs), I don't think they were in the original design. Is there any basis for omitting the lower sprinklers by considering them as being beneath an obstruction? Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (tel:860-535-2080) (ofc) 860-553-3553 (tel:860-553-3553) (fax) 860-608-4559 (tel:860-608-4559) (cell)
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