even the scope of 13R and annex material confirm you can not mix the two systems in one building. As for HORIZONTAL separation equal to building separation -as soon as it's possible to have the floor collapse and not affect the other side, then we'll talk about horizontal separation for two buildings.
Todd - who spec'd it and where does your PE status enter the issue for incorrect application of standards? Roland On May 28, 2009, at 6:19 AM, John Drucker wrote: > George, > > Careful George don't give em any ideas; "If they resist you pointing > out the fact that 13 should apply to the entire building, maybe point > out that using their logic, you could do the top 4 floors of a > residential high-rise using 13R?" > > This would NOT be permitted since a high-rise would be at least 75ft > highest occupiable floor above lowest FD vehicle access, or appx a 6-7 > story building wherein 13R is limited to "Residential Occupancies up > to > including four stories in height". Height being measured from grade > plane. > > Guys the title and scope of the standard make it clear 13R is not > intended for "Residential Occupancies" and not "Mixed Use" > occupancies. > Common areas including private garages; mail, trash, laundry, exercise > and storage areas that serve the residential occupancy are considered > "incidental" and appropriately addressed in 13R wherein these spaces > are > designed and installed in according to 13. However in the end its > still > a 13R system and not a 13/13R which simply doesn't exist. Mixed use > Buildings are provided for at IBC 508. > > Lastly be careful of the IBC Section 509.2 provisions. Read the > section > carefully especially the part; "separate and distinct building for the > purpose of determining area limitations, continuity of fire walls, > limitation of number of stories, and type of construction" There's no > mention of height with regards to fire sprinkler systems thus the > measurement is from grade plane and not the pedestal. I'm certain we > have many a 5 story building out there with 13R systems. > > John Drucker _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
