When a fire is a (insert number) alarm fire.  What does that mean?
493514
you guys are close. An alarm assignment is different in every Fire Department. What you get at each alarm depends on your Fire Department and how much apparatus they have. By calling for a higher alarm, you're getting more apparatus, and more manpower. It doesn't have to be 3 trucks for 3 Alarms. For example, if you've got a Engine and a Ladder Truck on scene and drop a 2nd alarm, you might get an additional Engine and a Chief. It all depends on what the ageny's SOP's are.
324825
How do you open the fire exit door form an alley? ANyways, the fire exit door would have set off an alarm.
206063
call 911\nnot cuz of the fire but cuz you're a dumb*ss
304177
thats because your house is on fire
848352
no firefighter here, just someone who always watches the reality justice shows, like forensic files, american justice, new detectives, etc., and consistently, arson is suspected when the burn patterns are observed.  if an accelerant is used, there's a more vivid "starting point" for the blaze, which goes out in a very definite direction.  if it were just a cigarette or unattended campfire, they could tell that too.  if gasoline or some other accelerant were used, that substance is usually soaked into the surrounding materials, such as dirt, trees, walls in houses, floor boards, etc., prior to ignition and cannot be covered up.  hope this helped!!  just don't go out now and commit arson!!
451194
Fire is basically a mixture of hot gases.\nHence it's state can be taken as gaseous.\nI thinks "fire" in your question means flame.\nIf flame is very hot, then gases nearby get ionized and we get plasma- another state of matter
399065
Ask your local fire deparment. Each room is different dependent upon square footage and floor reinforcement.
641178
"Fire is the rapid combination of oxygen with fuel in the presence of heat, typically characterized by flame, a body of incandescent gas that contains and sustains the reaction and emits light and heat." \n\nLet's go through this bit by bit:\n\n(1) Rapid combination of oxygen with fuel in the presence of heat. Oxygen, fuel, and heat are the essential ingredients of fire.\n\n(2) Typically characterized by flame. The pup qualifier "typically" allows me to sidestep the issue of apparently nonflaming fires, like you get with burning charcoal. I suspect charcoal fires do create flame--you just can't see it due to the lack of impurities or incompletely burned fuel in the plume. (You can't see a fuel fire at an Indy or CART race either, because the cars run on clean-burning methanol.) But that's a matter we can leave for another day.\n\n(3) Body of incandescent gas. Flame defined. Most encyclopedia and dictionary definitions blow past this entirely, allowing persons such as yourself to imagine that fire is "pure energy" or similar nonsense. We say "body" because the gas has a characteristic structure and composition. We say "incandescent" because (a) it sounds scientific, (b) it means "luminous with intense heat," precisely what we are attempting to convey, and (c) if the Teeming Millions are going to learn one vocabulary word today, by God "incandescent" should be it.\n\n(4) Contains and sustains the reaction. Flame isn't just the result of fire; it is the fire. What's more, without the flame's heat the fire would go out.\n\n(5) Emits light and heat. Duh. However, we mustn't overlook the obvious.
401106
If by firedoors you mean exit doors and if by locked you mean they cannot be opened without a key, then it is a violation of the fire code.  They can be cited and fined if they are caught.  God forbid there is ever and incident, they can and most likely will be held liable if someone perishes or is injured as a result of locked emergency exits.  \n\nThat being said, not all "fire doors" are "exit doors".  There is a difference.  A fire door is simply a fire rated door and can be locked if it is not an exit.\n\nArticle 10 of the revised International Fire Code outlines means of egress.   \n\nSpecifically the code reference you are looking for is...\n\nIFC 1008.1.8 Door Operations - Except as specifically permitted by this paragraph, egress doors shall be readily openable from the egress side without the use of a key or special knowledge or effort.\n\nThe section goes on to discuss acceptable door hardware, etc.  There are some exceptions, but they are few and very specific equipment must be used.  Basically, it discusses options that are acceptable for security of the store and safey of the occupants, panic hardware, delayed egress locks, etc. \n\nBottom line, if they are simply locking the door, report it to the local fire prevention office.  They will typically recieve a written warning on their first offence.
923818
Factories... Use Group F (F1 and F2), single story, with an occupant load of 500 or less is not even required to have a fire alarm much less fire drills.  (ICC 907.2.4).  I simplified that a little bit.\n\nSo the real question is does this factory have all 600 employees working at the same time, or does it run shifts?  If they keep the occupant load under 500, then no, no fire alarm and no drills.  \n\nIf they do have a fire alarm system, then it is required to be tested at least once a year (NFPA 72).  However, there is nothing requiring a factory to actually have a drill, although they are required to conduct safety training so employees know what to do in the event of a fire. (OSHA)
414115
alarm bells should be ringing here!!i think
592594
No way. One that is plan rude to the fireman that have to put it out should it get out of control. What if someone got seriously injury or worse killed.
120455
"Building schedule" Are you constructing a fire station?  Question not stated well at all...  Sry
545566
A down on his luck mathematician interviewed for a job as a fireman.  He was asked the question in his interview, "If there was a paper fire in a dumpster, how would you deal with it?"  The mathematician proceeded to describe how he'd get the fire hose and fill the dumpster with water, thereby extinguishing the fire.\n\nTwo weeks later, the fire company, with the mathematician as a new member, responded to a fire at a warehouse.  Arriving at the warehouse, they found a pallet of paper brochures on fire.  Quickly, the mathematician opened a warehouse door, grabbed a pallet jack, pushed the pallet into a dumpster outside the warehouse door, then grabbed a fire hose and fills the dumpster.\n\nThe fire chief was furious?  "What the heck you were doing?" he asked the mathematician.  The mathematician responded, "I simply re-expressed the problem in terms of a problem with a known solution."
130348
Incipient this is the building stage of fire.\nFree burning this is the stage of fire when all the condition are right. temperatures at cieling height can get well over 1000 degrees.\nSmoldering in this stage the fire has exhausted all of its oxygen and cannot complete the combustion process. Heat and fuel are still availabe but not oxygen. It is during this time that that the introduction of oxygen say by opening a door or window that a backdraft could occur. That is one reason firefighters cut vent holes in roofs so that they evacuate all the heat and flammable gases up and out of the structure
634034
Radon 360 makes excellent points, but not all systems operate in that fashion and you will find different regulations in different countries (and unfortunately in different provinces or states.)\n\nMost systems in the European community operate with closed loops circuits and an open circuit is an alarm.  In the U.S. it's bass ackwards, most systems close the circuit on alarm or lower the resistance on an initiaing circuit to the "alarm threshold".  There are pros and cons to both ways.  If the circuit remaining closed is a "safe" condition, this if something is inadvertently shorted or if a fire melts the insulation and the conductors touch, placing a short on the circuit, the system will fail to function properly.  Conversely, on a system that needs a circuit closure to activate, then a cut wire, or one conductor melted away would prevent proper operation.\n\nOutput circuits, or indicating circuits are a whole new ballgame.  Obviously, you can't have a "short" or the units would not get the power they need to operate.\n\nBottom line, most all fire alarm systems supervise both the initiating and indicating circuits in some fashion.  In the United States, Class "B" circuits use an end of line resistor or other device that the main control panel is constantly looking for, if it doesn't see it, it faults.  Class "A" circuits return the wires to the panel in a redundant fashion to build a fault tolerance into the system.  Technically Class "A" and "B" are old terms that have been replaced with "Style B and D" and "Style Y and Z" for initiating and indicating circuits respectively.\n\nIn the end, most diagrams are based on the information provided by the fire alarm control panel's manufacturer.  Their manual outlines the type of circuits the system is expecting and show example layouts that can be used to generate a specific system.  Some even offer CAD files that can be downloaded to assit to this end.  \n\nIf you are looking to design a system, consult a professional.\n\nIf you want to learn more about it, feel free to contact me direct.
1160907
Everyone's more or less right so far.\n\nBut there is another explanation as well.\n\nIf you were to call AT 6, I will be home--possibly because I never left, possibly because I will arrive before six, or possible I will arrive exactly at exactly at six.\n\nIf I will be home BY six, it means I  definately left, but if you want to call, then six is the earliest you can call to be guaranteed of reaching me at home.\n\nBy saying I will be home at 6, I am saying don't expect me to  arrive home before that time\nBy saying I will be home by six, don't expect me to arrive home later than that.time