I thought that if I have a 4 story OR the elevation of the highest floor is 30' above or below the fd vehicle access I would need a standpipe. When I look at 2009 IBC section 905.3.1 it only references the 30'. So I have a 4 story apartment where the top floor is right at 30'- it doesn't look like I need a standpipe. I just had it in my mind that once I hit 4 stories it was a done deal. These are design build apartment complexes with S2 Parking garage below where the architect is considering IIIA, IIIB or VB and I am looking at the different sprinkler options for each. Looks like I can have a 13R in the residential floors in IIIA where the other options are 13 throughout. Is there another section that kicks it in at a 4th floor? Maybe that was old UBC or maybe I dreamed it up.
905.3.1 Height. Class III standpipe systems shall be installed throughout buildings where the floor level of the highest story is located more than 30 feet (9144 mm) above the lowest level of fire department vehicle access, or where the floor level of the lowest story is located more than 30 feet (9144 mm) below the highest level of fire department vehicle access. Another thing I will throw out there that it looks like I had wrong... I thought the fire flow reduction was only available for 903.3.1.1 (13 system) but when I look at IFC section B105.2 - exception- It clearly allows it for 903.1.2 as well. Probably common knowledge for most of you but fyi... Rod at Rapid _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
