A problem I see with many hydraulic design placards is they don't accurately spell out the location of the design area or provide the date the calcs were done.
May not be the case with your project, but the placard's demand @ BOR could be accurate for some specific DA that is much closer to the system riser. This can happen with older systems when an isolated area is upgraded to a higher density/area and a new design placard is slapped on the system riser. Later, the new placard is assumed to represent the entire system. Ed Kramer Littleton, CO > This weeks crisis, so far....... > > I am working on a plant in MA where they need to add in rack > sprinklers. The existing ceiling system is a pipe schedule and the > placard at the riser says it can deliver .45/2500 at a flow of 1220 > gpm at 52 psi. It seemed light, but I don't jump 'til I crunch the > numbers. In actuality, it requires 1558 gpm at 286 psi at the supply. > Everybody, including the HPR carrier, has bought into the numbers on > the riser. Now the excrement is about to impact the vortex generator. > > Moral of the story; don't believe everything you read. > > Todd G. Williams, PE > Fire Protection Design/Consulting > Stonington, Connecticut > www.fpdc.com > 860.535.2080 _______________________________________________ Sprinklerforum mailing list http://lists.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)
