I am reviewing a set of plans where the designer used residential sidewall sprinklers in 13 system (6 story apartment bldg). A particular room is 18'6 x 12' and he has a sidewall throwing the 18'6 and centered on the 12 ft wall. Since we have to use a 0.10 density, he based his design on 11.2.3.5.2. The listing for the sprinkler at the 0.05 density (16 x 20 sp) is 22 gpm at 27.4 psi. If we use the 0.10 density times the area as described per 8.5.2.1 (comment (2) in 11.2.3.5.2), we get 22.2 gpm at 27.9 psi. How can we expect to get twice the density at a an 18.5 ft distance out of the same flow and pressure by decreasing the width of a room?
Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut www.fpdc.com 860.535.2 _______________________________________________ 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)
