▁installation ▁and ▁maintenance . ▁ ▁H yd ra ul ic ▁calculations ▁provide ▁a ▁ver ifiable ▁analysis ▁of ▁the ▁ 3 ▁primary ▁components ▁of ▁a ▁fire ▁supp ression ▁system : ▁▁ 1 ) ▁The ▁water ▁delivery ▁requirements ▁to ▁suppress ▁a ▁possible ▁fire ▁ 2 ) ▁The ▁available ▁water ▁supply ▁ 3 ) ▁The ▁network ▁of ▁pip ing ▁that ▁will ▁deliver ▁this ▁water ▁in ▁the ▁event ▁of ▁a ▁fire . ▁ ▁Water ▁delivery ▁requirements ▁Re quire ments ▁for ▁the ▁density ▁of ▁water ▁dis charge ▁are ▁usually ▁specified ▁by ▁an ▁applicable ▁model ▁code ▁such ▁as ▁N F PA ▁ 1 3 , ▁N F PA ▁ 1 5 , ▁EN ▁ 1 2 8 4 5 , ▁B S ▁ 9 2 5 1 , ▁N F PA ▁ 7 5 0 ▁CP ▁ 5 2 , ▁AS IB , ▁and ▁AS 2 1 1 8 . 1 . ▁Other ▁possible ▁international ▁and ▁ins urance ▁under writer ▁fire ▁design ▁standards ▁may ▁apply ▁to ▁projects . ▁ ▁The ▁probable ▁intensity ▁and ▁extent ▁of ▁a ▁possible ▁fire ▁inside ▁the ▁building ▁is ▁determined ▁by ▁factors ▁including ▁the ▁building ▁use , ▁the ▁building ▁height , ▁the ▁items ▁expected ▁to ▁be ▁stored ▁or ▁processed , ▁and ▁the ▁arrangement ▁in ▁which ▁these ▁items ▁are ▁stored . ▁These ▁variables ▁are ▁compared ▁to ▁tables ▁and ▁values ▁expressed ▁in ▁the ▁model ▁codes . ▁In ▁turn , ▁these ▁tables ▁and ▁values ▁in ▁the ▁model ▁codes ▁are ▁based ▁primarily ▁on ▁dec ades ' ▁worth ▁of ▁fire ▁tests ▁but ▁may ▁also ▁be ▁based ▁on ▁fire ▁growth ▁model ing