I started this a couple of emails ago but I'll finish it here. I don't particularly like the arrangement Randy wants but the question is can it be done. You don't have to use a floor control assembly. You do need valves and check valves, and you'd need a drain downstream of the check of course. There is nothing I know of that requires floor zoning of alarms in this size building so only tampers on the control valves would be necessary.
Randy, I don't see how you can eliminate the requirement for check valves. Todd, although you can't use check valves to segregate sections of the system you have to have the check valves. Two separate requirements. One has to do with isolating the floor for service. The other has to do with water delivery time. Bill, if you can't meet water delivery time without the check valves (test the system with spool pieces replacing the check valves during the testing) then you have failed another requirement. This whole idea may fall apart on the time it takes to drop this size system through an inspectors test port. Randy, unless you can think of a simpler method of testing water delivery time in some other method than dropping the system, replacing the checks with spools, bringing the system back up, testing, draining, replacing the checks and re-establishing full service then I think that IT&M will either: 1. be too expensive to justify the initial savings on installation or 2, not be done properly due to difficulty and cost. I think I'd go with manual wet combined (if possible) or two separate systems. This has been a nice simple exercise in design rather than layout. On Wed, Apr 9, 2008 at 6:26 PM, <[EMAIL PROTECTED]> wrote: > It looks like a dry standpipe system is OK by 2006 IBC 905.8. I've > tested one of these. The trip time and water delivery time is very > short when you open a 2 1/2" valve on a 200 ft piece of 4" pipe. > > However, I would wonder how you will meet the time to end head > requirement when you use the same dry valve for four stories. If you > choose to use check valves at each floor (as is required for wet > combined systems), then the reliability of these valves could be called > into question by the AHJ since check valves are not permitted to divide > dry systems. > > It doesn't look like this would be acceptable. > > Bill Brooks > > William N. Brooks, P.E. > Brooks Fire Protection Engineering Inc. > 372 Wilett Drive > Severna Park, MD 21146 > 410-544-3620 Phone > 410-544-3032 FAX > 412-400-6528 Cell > > > > -------- Original Message -------- > Subject: Dry standpipe and dry systems. > From: "Randy Knutson" <[EMAIL PROTECTED]> > Date: Wed, April 09, 2008 6:51 pm > To: <[email protected]> > > Forum Members, > > > > I have a two part question. > > 1. Can I have a combined standpipe on a dry system? I have 4 story > factory > building that's not heated. Fourth floor is above 30 feet so I need a > standpipe. I have a heated pump room with a dry pipe valve. I was first > looking at the project with a dry manual standpipe and a separate dry > sprinkler system riser. I would like to combine the two and save piping > > > > 2. Is it OK to put floor control valves in on dry pipe system? There is > a > removable section of roof where they take equipment out. I would like to > give the facility the ability to shut individuals floors down for > modification to the systems. > > > > Thanks, > > > > Randy Knutson > > Shilo Automatic Sprinkler, Inc. > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email > to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > -- Ron Greenman at home.... _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
