I've got a building that is two towers with a parking garage in between. One tower is 11 floors and is a high rise, with two standpipes. The other tower is 9 floors and isn't a high rise, with three standpipes. The AHJ has said that because the towers and garage are all connected, the tower that isn't a high rise is considered a high rise with respect to standpipe calculations. I had originally considered my calc to be 750 gpm for the two standpipes in the high rise, them being automatic wet, and 1000 gpm for the three in the non-high rise, them being manual wet. Does it make sense that the AHJ has said it is one building with 5 standpipes, and to do a 1000 gpm calc with the two standpipes in the high rise and one in the non-high rise (the fire pump is in the non-high rise)?
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