When reviewing any standpipe system I've followed the 500 gpm @ 100 psi for 2 ½” hoses and 100 gpm @ 65 psi for 1 ½” hoses, which gives a 15.000 gallon tank for the half hour (at maximum demand) it should provide while the firefighters arrive.
This week someone mentioned to me that in NFPA 14, numeral 5.4.1.1 it says that for buildings not classified as high-rise buildings (i.e. shorter than 75 ft -23 mt-) class I (2 1/2”) can be manual and 5.4.2.1. says that the automatic part of class III systems can be the one only for the class II (if class I is manual), so he concludes that the water reserve can be one for only the class II part of the system which is only 3.000 gallons.
Does this make sense? I had never seen before this interpretation of NFPA 14 regarding water reserve size.
Thanks in advance.
This week someone mentioned to me that in NFPA 14, numeral 5.4.1.1 it says that for buildings not classified as high-rise buildings (i.e. shorter than 75 ft -23 mt-) class I (2 1/2”) can be manual and 5.4.2.1. says that the automatic part of class III systems can be the one only for the class II (if class I is manual), so he concludes that the water reserve can be one for only the class II part of the system which is only 3.000 gallons.
Does this make sense? I had never seen before this interpretation of NFPA 14 regarding water reserve size.
Thanks in advance.