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ESFR Design Criteria - Same System

Question asked by robtgriffin.rga on Aug 16, 2018
Latest reply on Aug 18, 2018 by nocivus

ESFR system with K-14.2 sprinklers designed to discharge 12 @ 50-psi; is it permissible to install K-16.8 ESFR sprinklers designed to discharge 12 @ 52-psi over a caged aerosol storage area (and 20-feet beyond) on the same system; and is a 2-foot draft curtain required between the two ESFR design areas?

 

Similar question: If a roof height varies (but slope not more than 2 in 12; 16.7%), is it permissible (for example) to install K-22.4 ESFR (12 @ 40-psi where roof height is above 40-feet) and K-16.8 ESFR (12 @! 52-psi where roof height is under 40-feet) on the same system; and is a draft curtain required between the two design areas? If the more demanding higher roof area design extends 15-feet beyond into the lower roof height design area, would draft curtains be required (or both design extending 15-feet beyond and draft curtains required)?  

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