Hi! I would appreciate your help with the interpretation of the following:
On NFPA 13 (2019), paragraph 188.8.131.52 states that "the minimum water supply shall be available for the minimum duration specified in Chapter 19".
Afterward, paragraph 184.108.40.206.1.1 indicates "The water supply requirement for sprinklers only shall be calculated from the density/area curves of Figure 220.127.116.11.1 or from Chapter 26 where density/area criteria are specified for special occupancy hazards".
Does this mean that for determining the water tank capacity I can use density by area from Figure 18.104.22.168.1 plus water hose demand by the duration specified in table 22.214.171.124.2? Or should I use the water flow resulting from the hydraulic calculations by the same time duration?