We have to provide sprinklers 4 feet on center to protect the opening between a commercial kitchen and a seating area.
The number of heads to be calculated is based on the 1.2 times the square root of 1500 per NFPA 13 2007 Edition. W have first calculated the water curtain demand assuming each sprinkler needs to flow 15 gpm.
We get a required pressure and flow for the end node serving the water curtain. The calculated flow/pressure is then used in the full calc to balance the remaining system around. So in essence we are calculating the system in two parts.
Is this the correct methodology? As best I can tell the water curtain demand must be in addition and must be balanced with the remote area.
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