So from the 10th floor to the top one of the stairs continues straight and the other offsets. Although the vertical shafts are in different locations, the offset stair is one, not two stairs. If I'm understanding this correctly, you have a 12 story building with two exits stairs. Assuming that's correct, I would supply the 3 level portion with a riser that offsets from its location in the shaft that goes down to the ground from the 10th. Your standpipe follows the path of travel.
The foregoing is my opinion only and not intended to represent NFPA or the NFPA 14 Technical Committee or any measure of interpretation of the standard. Steve L. -------- Original message -------- From: Jerry Van Kolken <[email protected]> Date: 5/1/18 8:09 AM (GMT-08:00) To: [email protected] Subject: RE: Secondary Standpipe on Upper Levels 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]] On Behalf Of Steve Leyton Sent: Monday, April 30, 2018 8:25 PM To: [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]> Date: 4/30/18 5:39 PM (GMT-08:00) To: [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]] 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
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