Initial Foam discharge - Shielded Fires

We are designing a sprinkler system for a boat building shed. 18m high. I have selected OH3s which results in a flow rate of just under 5000 l/min and now find there is insufficient water without tanks - (providing water storage has its own set of difficulties). I have looked at NFPA 303 & 307 and the FM datasheets and tried to find an alternative protection method than wet pipe sprinkler

I know NFPA 851 allows selection on initial foam discharge for sprinkler design to turbine / oil areas in power stations and the discharge density is about half that of straight water - but that is for oil and not shielded fires

wondered if anyone has had experience along this line

Hi Graham
Dick Gillespie may be able to help you. Ph 021 087 19522
Paul C