Hi Ben: I work in New York City and sprinkler on both sides of glass door is used very often over here in lieu of fire rated door at egress corridor.
Same as above for open stair, with draft stop and closely spaced sprinklers, although we have to request a variance from the department of building on every job. Best of luck Ramez > On May 25, 2017, at 4:04 PM, Ben Young <derblitzkrie...@gmail.com> wrote: > > This is really a two part question, one dealing with closely spaced > sprinklers at glass doors, and the second dealing with convenience stairs. > > Both deal with the 2012 IBC > > > Backstory: Existing fully-sprinkled office building, we are doing a tenant > fit-out for one client across three floors. Code page says use group B, > construction type IIB, height is 12 stories. > Our work is on the 5th-7th floors. > > #1) > I have an A/E drawing with the following note on it: > "Closely spaced sprinklers shall be installed on both sides of glass wall or > door assembly in accordance with IBC section 404.6 Sprinklers are to be > spaced 6' on center and between 4" and 12" away from the face of the glass." > > The problem is this isn't in an atrium, its for the doors leading from an > elevator lobby into the main section of an office building. > > This is definitely not allowed based on my reading of 404.6, as its not an > atrium, correct? > My plan is to RFI this and tell them they need rated glass for this > application or a regular rated door and wall assembly. Anything I'm missing > here? > > #2) > The owner wants to add a 3-story convenience stair, and this is where I'm not > 100% sure of what the IBC is telling me. I know NFPA 101 doesn't allow this > over 2 stories. > > So I'm reading Chapter 10, section 1009.3, but this isn't a required exit > stair. I got kicked to 1009.3 by 712.1.12 which is vertical openings for > unenclosed stairs and ramps. > (why do they call these vertical openings in the IBC, they're in the > horizontal plane?) > > Under 1009.3, I think I fall under exception 3, but I don't know for sure > that the entire building is only Group B or M. > > The A/E notes for the stairs are as follows: > "Sprinkler at stair 833A shall be provided in accordance with NFPA 13, > including but not limited to, beneath stair landings, at top of stair > enclosure, and underneath stair risers as required." > "Existing piping where required shall be routed out of stair enclosure" > > Unless their trying to pull a scumbag move of making 'but not limited to' > mean we own a water curtain and draft stop, they are going to be revising > these drawings. > > Also, the drawings show NO enclosure at all around these stairs in the very > detailed section views, only glass hand rails and nothing on the RCP > indicating draft stopping or any sprinkler heads. Strike that, the section > views do show glass smoke baffles. > > These FP drawings do show all the other sprinkler heads in the tenant fit-out > areas, except for around the stairs, the doors, and some extras where they > have record storage... Its starting to feel like our sales guys went through > the plans too fast now... at least as far as the heads around the stair > openings go. > > What do you guys think? > > > Benjamin Young > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
