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)
