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nfpa 13 clause

Question asked by sslfire on Dec 20, 2017

Hi, pertaining to the clause (9) Friction loss shall be excluded for the fitting directly connected to a sprinkler, does a tee or elbow that connects directly to a sprinkler head should not be included for hydraulic calculation? This is because our fire insurer is asking to input 2 elbow and 1 tee for an arm-over while we only include 1 elbow in our calculation. Attached some image for reference. Should the sprinkler added to pipe 194 197 as per image spr1 or on pipe 197 206 as per image spr2.