As the story was told to me, this dates back to the first iron-framed buildings with brick exterior walls. The buildings were generally walk-ups (pre-elevator days) so they were up to four stories tall. The problem was that the iron would expand in a fire and push outward on the walls until the brick failed and collapsed. The 40-foot distance was considered to be out of reach of the falling brick and would allow the fire department to shut off the water to conserve water for manual fire fighting.
Might be true, might be a campfire story. Paul J. Pinigis, P.E. Chief Life Safety Engineer -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Sornsin Sent: Wednesday, June 18, 2008 10:43 AM To: [email protected] Subject: PIV 40ft from Building Forum: Anyone know the reason WHY PIVs are to be located at least 40 ft. from the building (on a fire service line piped into the building)? I have heard some theories - like to keep the valve free from a collapsing wall. But I am curious if any of you have any definitive explanations for that number. Why not 30 ft.? Why not 50 ft. We are dealing with an AHJ who is requiring we pipe an underground an additional 200+ ft. around a corner just so our PIV can be at least 40 ft. from the building. Otherwise, if we pipe straight out the building, the public right-of-way is such that we'd be only 31 ft. from the building with the PIV. This is not good enough for this gentleman since, as he says, it is POSSIBLE for you to get it 40 ft. away (with the 200+ ft. of underground). If there was no other way, he would have allowed the 31 ft. separation. Frustrated-in-Fargo, PE Fire Protection Engineer Ulteig Engineers, Inc. 3350 38th Avenue S. Fargo, ND 58104-7079 Direct: 701. 280.8591 Fax: 701.280.8739 Cell: 701.371.5759 [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> www.ulteig.com <http://www.ulteig.com/> Cofidentiality Notice This message may contain privileged and confidential information. If you think, for any reason, this message may have been addressed to you in error, you must not disseminate copy or take any action in reliance on it, and we would ask you to notify me immediately by return email to [EMAIL PROTECTED] _______________________________________________ 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)
