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)
