With the Multi floor jobs we've done, it became practical after doing a calc for the top floor (7th), to do a new calc for the 4th to minimize the pipe sizes. At that point no further pipe size advantage could be gained, since 1st floor was all merchantile, and B1 and B2 were dis-simular parking levels.
At some level it makes economic sense to re-calc, and the poorer your supply the earlier you'll see that impact. Every floor?? If the supply just barely makes the top floor, the elevation gain alone may make a new calc cost effective. This is generally the case where Manual standpipes are allowed. (Less than 75') once the standpipe is pump fed, there need to be several floors before size change can make significant cost impacts (savings). Thom This has been our experience, your experience may differ. What's the view of the Forum on whether a floor is a system? Roland _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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)
