This is an unusual case - it is not for volume or congestion - there are 4 stairs, (2 sets) within 50-60 feet of each other in an amusement building. You pay to go up but you get to come down for free.
My thoughts were since the hose valves are serving the same area it is overkill to calc 1,000 gpm at an elevation of only 50' - manual wet should be allowed per law, but the EOR says auto is what he wants, serving about 14,000 sqft per floor. But Ok, I got what I needed - thanks. Greg McGahan Operations Manager Living Water Fire Protection 1160 McKenzie Road P.O. Box 877 Cantonment, Florida 32533 (850) 937.1850 | Fax (850) 937.1852 | Cell (850) 554.3231 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Steve Leyton Sent: Wednesday, March 25, 2009 11:42 AM To: [email protected] Subject: RE: side by side standpipes What Tom and Cliff said. The code says that when Class I or III standpipes are required in a building, they shall be located so that there is a hose connection at every landing of every REQUIRED exit stair. That is to say, as required by code, which the scissor designs are most definitely. This is usually to exit a high-capacity room or building in as little area as possible so stairs are ganged up - I've done projects with 3 and 4 in a cluster and it's usually for A-Group occupancies where lots o' folks are crowded into rooms like ballrooms and conference centers. Since you can't get from one stair to the other, they are "separate" stairs, even if they're in the same shaft. The selection of intermediate or floor-level landings is as approved by the AHJ. Steve Leyton Protection Design & Consulting San Diego, CA -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Tom Duross Sent: Wednesday, March 25, 2009 9:26 AM To: [email protected] Subject: RE: side by side standpipes Greg- What Cliff said. 500 for the first and 250 for each other for your standpipe hydraulics up to 1000 or 1250, depending on sprinklers. Tom Greg, If have understood your description, these are called 'scissor stairs' and are fairly common in condos in south Florida. As far as I am aware, there is no way to get rid of one of them. They are required in each stairwell. As far as the calcs go, you would calc this the same way you would if they were separated by 100 ft. It is a completely different standpipe as far as the code is concerned. Cliff Whitfield, SET Does anyone have experience with standpipes serving a building where there is an "up" stair and a separate "down" stair adjacent to each other. Both serving the same floor area or fire zone. The EOR is asking for a s/p in each stairwell. Do you have to calc 2 valves on the same floor? Or can you calc one valve per FLOOR? Is there a legit way to eliminate one of the s/p's? Greg McGahan _______________________________________________ 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) __________ Information from ESET NOD32 Antivirus, version of virus signature database 3961 (20090325) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signature database 3961 (20090325) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com _______________________________________________ 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) _______________________________________________ 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)
