Forgot, there are two other standipipes (size unknown) 3 stories with 2-1/2" hose valves.
At 08:00 AM 4/6/2009, you wrote: >Determining age is a difficult task. There have been several >additions and modifications to the system with very little record >keeping. From an FIA plan, the oldest building is 1932. There are >additions dated 1955, 1967, 1973 and one that was erected after the >date of the plan, which is 1975. Even the plan isn't clear on where >one stops and the other begins. Most of the appendages are labeled >"addition" or "wing", so as to what constitutes a different building >is probably a good question. > >There is one 2-1/2", 5-story standpipe with 1-1/2" FHV and one >2-1/2", 4 story standpipe with 1-1/2" FHV. I believe that these are >both part of the 1932 building. There is one 2-1/2", 5-story >standpipe with 2-1/2" FHV. I'm not sure the age of that building. One >3-story building with 2-1/2" FHV fed from a 4" combination riser >(buried in wall. I believe that is 4". The rest are fed from >'horizontal standpipes' on the level where the service enters or a >fed from sprinkler mains. Three of the standpipes are interconnected, >but there are also sprinkler risers that are interconnected, so I'm >not sure (at this point) what is connected to what. I'm getting close, though. > > > > > >At 04:57 PM 4/5/2009, you wrote: > >Sounds like your first task is to map the standpipes, since they are buried > >in walls. (Unless accurate as-built drawings exist.) The easiest way we've > >found to do this is with an underground locator, with an induction signal. > >(Similar to a line locator the utilities use.) You can rent these at some > >rental supply places.) Once you confirm what connects to what, some > >exploratory holes will have to be made to verify pipe size. See Snake tech. > >by Ridgid tool co makes this a easier task, with less cleanup or repair to > >rated wall assemblies. Even so you're not going to know where every fitting > >is, so be generous in your calc's for Phantom fitting loss. Calc's are > >required because even the old requirement was 65Psi at the top, and current > >requirements are for 100Psi. If you static on the supply is only 60, it > >didn't meet code when it was installed if the building is newer than 1963. > >(I believe that was when the 65Psi was required in 14.) > >Sounds like calc's for Manual wet standpipe or fire pump for automatic. > > > >Thom McMahon, SET > >Firetech, Inc. > >2560 Copper Ridge Dr > >P.O. Box 882136 > >Steamboat Springs, CO 80488 > >Tel: 970-879-7952 > >Fax: 970-879-7926 > > > > > >-----Original Message----- > >From: [email protected] > >[mailto:[email protected]] On Behalf Of Todd Williams > >Sent: Friday, April 03, 2009 4:40 PM > >To: [email protected] > >Subject: Standpipe dilemma > > > >I think I referenced this project in a previous post, but I have now got the > >whole place mapped out (I think) and need some input on solutions. > > > >The facility is a hospital. The interconnected buildings range from 1 to 6 > >stories on a side hill. On the south side, you enter at floor 1; the north > >side floor 3. Three separate lead-ins, two non-interconnected connections to > >the public supply. The building is only partially sprinklered. Static > >pressure is approximately 60 psi > > > >There are multiple standpipe/hose valve connections. Some, but not all, are > >fed from dedicated standpipe lines. Hose valves in cabinets in hallways. > > > >6th Floor - no hose connections (mechanical and support areas only) 5th > >Floor - one 2-1/2" valve, one 1-1/2" valve 4th floor - three 2-1/2" valves, > >one 1-1/2" valve 3rd Floor - four 2-1/2" valves, one 1-1/2" valve 2nd Floor > >- four 2-1/2" valves, three 1-1/2" valves 1st Floor - five 2-1/2" valves, > >two 1-1/2" valves. > > > >Some 2-1/2" valves have 1-1/2" reducers, some do not. Most all riser piping > >is buried behind the walls and not in stairways. Not easily accessible for > >replacement > > > >One riser goes 5 floors, some go three, some valves a fed from horizontal > >mains on floors where the service enters. > > > >They are being required by the State to test the standpipes. My task is to > >figure out the standpipe criteria and design a system so that the criteria > >can be met. > > > >Any thoughts on what the design criteria would be for this system? > > > >Todd G. Williams, PE > >Fire Protection Design/Consulting > >Stonington, Connecticut > >www.fpdc.com > >860.535.2080 > >_______________________________________________ > >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) > >Todd G. Williams, PE >Fire Protection Design/Consulting >Stonington, Connecticut >www.fpdc.com >860.535.2080 >_______________________________________________ >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) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut www.fpdc.com 860.535.2080 _______________________________________________ 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)
