Inspector 102
Silver Member
If calculating the required fire flow for the following fire, which formula would be used?
Single story storage building is 75 x 100 feet with exposure on 2 sides. the building is 75% involved.
75x100=7500/3=2500 x 75% = 1875 + 25% for each exposure (x2) = 1250 = required fire flow of 3125 GPM, or
75x100=7500/3=2500 x 75% = 1875 + 25% of 1875 for each exposure (x2) = 937.5 gpm = 1875 + 938 = 2813 GPM
This was a sample question on a test which raised all kinds of arguement. Although only 300 GPM difference, when it comes to test questions, you know how picky they can be.
I calculate LxW/3 = NFF @ 100% / 25% x %involvement + 25% for each exposure which is the first formula. They say that is wrong based on Fire Officer Strategy and Tactics handbook. I am not sure whether I learned this from Vincent Dunn or Brunocenni, but I am sure this is the way I alway calculated. Any comments on which method is correct?
Single story storage building is 75 x 100 feet with exposure on 2 sides. the building is 75% involved.
75x100=7500/3=2500 x 75% = 1875 + 25% for each exposure (x2) = 1250 = required fire flow of 3125 GPM, or
75x100=7500/3=2500 x 75% = 1875 + 25% of 1875 for each exposure (x2) = 937.5 gpm = 1875 + 938 = 2813 GPM
This was a sample question on a test which raised all kinds of arguement. Although only 300 GPM difference, when it comes to test questions, you know how picky they can be.
I calculate LxW/3 = NFF @ 100% / 25% x %involvement + 25% for each exposure which is the first formula. They say that is wrong based on Fire Officer Strategy and Tactics handbook. I am not sure whether I learned this from Vincent Dunn or Brunocenni, but I am sure this is the way I alway calculated. Any comments on which method is correct?