My suggested steps: 1. Trace all piping. 2. Expose all fittings. 3. Create as-built drawing with best guesses when it comes to pipe types, hanger locations, fitting types. 4. Perform hydrostatic test. 5. Flow test all outlets. Use fire department equipment for outlets fed by siamese and use existing water supply for outlets not fed by siamese.
I'm not sure why the age of the system, the history of the building, or the number of buildings is important based on the scope of work you have been given. Bill Brooks -------- Original Message -------- Subject: RE: Standpipe dilemma From: Todd Williams <[email protected]> Date: Mon, April 06, 2009 8:29 am To: [email protected] I have the drawing pretty much done, except for a few pipe sizes. Only one 'building' is obvious. The rest who knows. A three story wing off a one story building? Addition or new building? At 08:15 AM 4/6/2009, you wrote: >Jeez Todd, more design according to DMR/HHS standards? >Keep digging, takes a lot of time. I usually prepare a schematic. >Can you determine what is a "wing" or "addition" vs. what is another >"building"? >Tom > > >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 > >_______________________________________________ >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) _______________________________________________ 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)
