Terminology always amazes me as how it changes, from place to place and how the vernacular differs. Anyway, here in the NE Rustbelt, a master stream mounted permanently to the apparatus, (but not an elevated master stream as in a piped ladder or elevated platform) we would call a deck gun. A master stream that is fed by large diameter hose, LDH (or we would simply call it supply hose) that is intended to be portable and run from a flat surface, such as the ground or a flat roof top we call a "Stang Gun", but this is a trade name. These are good for getting to remote locations where we can't take a rig, such as alleys and rear yards. An elevated master stream is a piped aerial ladder or elevated platform and is called, well, an elevated master stream of course! Smaller versions of portable deck guns, such as the "Blitzfire" which takes its' supply from 2.5" hose are not truly master streams, as the gallonage doesn't meet the requirements for a master stream, are very handy tools indeed. We keep both stacked and TFT tips with them, and they are a great choice for exposures because once they are set up, they can be left unmanned if you're shorthanded or manned by just one guy and they don't rob too much from the water demand equation. Wiith that said, onto Jims question.....
You're right, Jim, radiant heat will penetrate your fog stream if it's used like a curtain, but if you're putting it directly on the exposure, making the exposure wet, it should do the job. A smoothbore tip directly on the exposure will probably do some damage. On our Sutphen buckets we have dual appliances, so we have one smoothbore and one TFT Master. We keep the TFT Master on our piped aerial ladders. We can substitute a smoothbore, but it takes time and there is usually no need to. Our Stang Guns can have either one, and is usually stored with no tip because of compartment space.
All of our master stream appliances are capable of 1000 gpm flows and with a smoothbore tip are capable of doing a great deal of damage. We need FG Commands approval to use them. On the negative side, they can buckle walls, topple chimneys and send roofing materials great distances. On the positive side, they have great reach and penetration for getting deep into structures and are quite suitable to very large structures such as factories and churches and warehouses, provided some care is taken in where they are pointed. They are also quite handy when there is a need to strip an asphalt roof and boards when you can't risk putting a team on the roof the conventional way. Needless to say, this only happens when the building is empty of all personell, and we always tell those on the fireground before we deploy so they can get their visors down and hopefully behind something, a tree or an outbuilding, because when you've seen this "unroofing" process from a bucket, it is truly awesome, the kind of power you are unleashing. TJP
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