The blades of the axes used in the fire service are not usually kept as sharp as some that you might use if you were really going to cut down a tree or something. The fear being that in use it will strike a nail or other metal object and break a fragil edge. The other thing is that they are not sharpened often enough to be kept sharp, mainly that is the fault of lazy fire fighters. The pick on the head of the pick-head axe is usefull for realativly few things. It is for piercing stuff. It can be used to help pry up floor boards, or off siding from the outside walls of a building. The flat-head axe is able to be used as a 'hammer' as well as an axe. Hatchets are used some of the times, they often have neat little holster things, but really few people use them, I have only ever seen one.
The axes that we had were about the weight of a regular axe, but of course the fiberglass ones weighed alot more.
I did not mention earlier that the fiberglass does not conduct electricity. And as you could guess the axe gets used as a prying tool which can cause the handle to break, the fiberglass does not break as often.
Ok for my personal preferance I would choice the combination of a flat-head axe and Halligan Tool (This has a flat pick and a pointy pick on one end and a flattish claw on the other, it is very heavy as it is solid metal and almost as long as an axe) If I can find a good picture of a halligan tool I will post it on here if you want me to. But with this combination you sort of get the most versitile group of tools for forcible entry, search and rescue, and salvage. Though I am sure if you ask other people you will get other answeres.
For forest fires axes are not the most usefull tools. Chain saws work alot quicker and easier. And shouvels, rakes and the such are used more often. So I would say that most axes are used for structure fires, rather than brush or forest fires.
Ok, I have lost track of what I have answered and what I have not, so if I missed something you'll just have to ask again. My brain is just not working as fast as it usually does.
Ross