Assuming a SSU, you need to be 3x the diameter of the pipe away. So, your deflector would need to be 13.5" away from the top of the pipe. That measurement is on the diagonal, so you could arm out the side and up so the distance hits 13.5". There is also an exception to the 3x rule, that in light and ordinary hazard areas, only structural members shall be considered for the 3x rule. So, using that allowance, the sprinkler could be directly on the pipe if you have an SSU in a light or ordinary hazard area.
Happy Thanksgiving! Travis Mack MFP Design, LLC 480-505-9271 Sent from my iPad On Nov 24, 2011, at 8:34 AM, Cory Power <[email protected]> wrote: > Does anyone know the minimum distance an upright can be above of a 4" main. > it will be coming off a 4 x 1 on a dry system. There isn't much room. > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20111124/81ef0e9e/attachment.html> > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
