Design procedures of Area/Density method

Design procedures of Area/Density method

(Occupancy Hazard Fire Control Approach)



1.Classify occupancy hazards.



2.Decide minium water supply requirments.

a)Spk. demand-Area/Density curves.

b)Hose stream Demand.

c)Duration in minutes.



*Minium water supply=(A*D+Hose)*time



3.Decide the number of risers required:maximum floor area on anyone floor per system.



4.Decide Spk. spacing between branch lines (L) and along branch lines (S).

a)Maximum protection area per spk.

b)Spk. spacing limitation.

c)Protection area of the spk=S*L



5.Layout plan in consideration of vertical and horizental obstructions.



6.Preparation for hydraulic calculation.