IF you did the original...... -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Travis Mack, SET Sent: Thursday, February 07, 2008 1:57 PM To: [email protected] Subject: RE: Arm over Calculations
The typical scenario I see with this is where we have a shell office or retail space. The shell space is typically designed for 1500+ sq ft. Then, when you drop in a ceiling, you often have the QR reduction that comes into play for a reduced design area of 900 sq ft. Now, with the arm overs and such, I have not seen it throw off a calc when you are reducing the design area by 600 sq ft. I am not saying that it can't happen, but just that I have never seen it. However, if you did the shell with the QR reductions, then you may be at a point where the extra arm overs and such do create a problem for the calculated systems. Also, if you are using some of the newer calc programs, it is pretty simple to slap a remote area on the system and get it calc'd in a matter of a few minutes. You can then prove the point that it really is not an issue. Travis -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joe Hankins Sent: Thursday, February 07, 2008 11:39 AM To: [email protected] Subject: Re: Arm over Calculations Regardless off what one's interpretation of NFPA 13 is, the inescapable fact is that adding arm overs (two elbows = 10+ feet of 1 in. pipe by themselves) will throw the original calculations significantly off. Joe Craig Rauch wrote: > My question is regarding an existing light hazard system. We are currently using the 2002 NFPA 13. > > The system was calculated last year when this was a shell space as light hazard. They are now fitting this space out, and have submitted plans showing a number of arm overs and some additional heads to accommodate the layout of the space. > > The question has now come up as to if we should require calculations. > > At what point would you say the calculations were needed for this type of work? > _______________________________________________ > 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) __________ NOD32 2856 (20080207) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com _______________________________________________ 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)
