I get it now. The building has two egress stairwells as Steve put it. That offset portion is going to be no-man’s land for all disciplines to cross and possibly you also. That’s something to verify with the AHJ.
> On May 1, 2018, at 12:34 PM, Jerry Van Kolken <[email protected]> wrote: > > I’m trying to figure out if I need another isolation valve or if I can save > about 50’-60’ of piping. > > The sprinkler system if feed from a combination standpipe in the stair well > that runs all 12 floors. > > Jerry Van Kolken > Millennium Fire Protection > (760) 722-2722 > > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of AKS-Gmail-IMAP > Sent: Tuesday, May 01, 2018 9:14 AM > To: [email protected] > Subject: Re: Secondary Standpipe on Upper Levels > > The reason behind these questions is because the situation does not smell > right and we are trying to envision how this thing works within the building > code. > > When you enter an egress stairwell you are supposed to be entering a > structure that basically guarantees a safe path to street level safety out of > the next doorway. The implications for this extends into how the enclosure > for this path is isolated from the building structure itself and all MEP > systems. That stairwell egress path typically commands the highest enclosure > protection of anything else in the building. How that super protected egress > path is traversing half the building on the 10th floor of a 12 story > high-rise is a head scratcher in many ways. > > In the very least that passage is functionally part of the lower stairwells. > If it actually connects to both the lower stairwells, providing an exiting > choice at the 10th floor, then you have the question as to whether or not one > or both of the lower standpipes should supply that upper stairwell standpipe. > It sounds like it is not the same situation as having one of the stairwells > being a straight shot all the way up to the 12th floor. > > By the way, what supplies the floor level sprinkler systems? > > Allan Seidel > St. Louis > > > On May 1, 2018, at 10:09 AM, Jerry Van Kolken <[email protected] > <mailto:[email protected]>> wrote: > > Correct, it will be a second stair for the upper level until you get to the > first full floor at level 10. Then your be roughly in the middle of the floor > and would travel to either end of the building to the full set of stairs down > to the ground floor. > > Jerry Van Kolken > Millennium Fire Protection > (760) 722-2722 > > From: Sprinklerforum [mailto:[email protected] > <mailto:[email protected]>] On Behalf Of Steve > Leyton > Sent: Monday, April 30, 2018 8:25 PM > To: [email protected] > <mailto:[email protected]> > Subject: Re: Secondary Standpipe on Upper Levels > > So it's an offset stair, correct? In other words, it doesn't just go from an > upper floor down 3 levels to a lobby, it stays in an exit passageway and you > go horizontally on the transfer floor to a different stairwell for the rest > of the trip down to exit discharge, is that right? > > > Steve > > > -------- Original message -------- > From: Jerry Van Kolken <[email protected] <mailto:[email protected]>> > Date: 4/30/18 5:39 PM (GMT-08:00) > To: [email protected] > <mailto:[email protected]> > Subject: Re: Secondary Standpipe on Upper Levels > > The building loses half of the floor on the upper levels, so it’s a second > stair for the top levels. And the ahj is calling it a required exit > > Jerry Van Kolken > > On Apr 30, 2018, at 16:01, Steve Leyton <[email protected] > <mailto:[email protected]>> wrote: > >> Why is there a “partial stairwell”? Is it classified as required exit >> stair or a convenience stair? >> >> Steve L. >> >> From: Sprinklerforum [mailto:[email protected] >> <mailto:[email protected]>] On Behalf Of Jerry >> Van Kolken >> Sent: Monday, April 30, 2018 3:04 PM >> To: [email protected] >> <mailto:[email protected]> >> Subject: Secondary Standpipe on Upper Levels >> >> I have a 12 story project with a partial stairwell on the top 3 floors. The >> AHJ is requiring a standpipe at this partial stairwell. My question is to I >> need to run another vertical feed from the pump on the first floor, or can I >> do a horizontal feed off the standpipe in the opposite stairwell on the >> upper level? >> >> Jerry Van Kolken >> Millennium Fire Protection Corp. >> 2950 San Luis Rey Rd. >> Oceanside, CA 92058 >> (760) 722-2722 FX 722-2730 >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> <mailto:[email protected]> >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org >> <http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org> > _______________________________________________ > Sprinklerforum mailing list > [email protected] > <mailto:[email protected]> > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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