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Fire Detection and Protection System
The
first step toward halting a fire is to properly identify the incident,
raise the occupant alarm, and then notify emergency response professionals.
This is often the function of the fire detection and alarm system.
Several system types and options are available, depending on the
specific characteristics of the protected space. Fire protection
experts generally agree that automatic sprinklers represent one
of the single, most significant aspects of a fire management program.
Properly designed, installed, and maintained, these systems can
overcome deficiencies in risk management, building construction,
and emergency response. They may also provide enhanced flexibility
of building design and increase the overall level of fire safety.
Fire Growth and Behaviour
Before
attempting to understand fire detection systems and automatic sprinklers,
it is beneficial to possess a basic knowledge of fire development
and behavior. With this information, the role and interaction of
these supplemental fire safety systems in the protection process
can then be better realized.
Basically,
a fire is a chemical reaction in which a carbon based material (fuel),
mixes with oxygen (usually as a component of air), and is heated
to a point where flammable vapors are produced. These vapors can
then come in contact with something that is hot enough to cause
vapor ignition, and a resulting fire. In simple terms, something
that can burn touches something that is hot, and a fire is produced.
When
the ignition source contacts the fuel, a fire can start. Following
this contact, the typical accidental fire begins as a slow growth,
smoldering process which may last from a few minutes to several
hours. The duration of this "incipient" period is dependent
on a variety of factors including fuel type, its physical arrangement,
and quantity of available oxygen. During this period heat generation
increases, producing light to moderate volumes of smoke. The characteristic
smell of smoke is usually the first indication that an incipient
fire is underway. It is during this stage that early detection (either
human or automatic), followed by a timely response by qualified
fire emergency professionals, can control the fire before significant
losses occur.
Successful
fire suppression is dependent on extinguishing flames before, or
immediately upon, flaming combustion. Otherwise, the resulting damage
may be too severe to recover from. During the incipient period,
a trained person with portable fire extinguishers may be an effective
first line of defense. However, should an immediate response fail
or the fire grow rapidly, extinguisher capabilities can be surpassed
within the first minute. More powerful suppression methods, either
fire department hoses or automatic systems, then become essential.
A fire general consequences
may include:
*
Collections damage : Fire generated heat and smoke can severely
damage or totally destroy these items beyond repair
* Operations and mission damage : A fire can shut your businessdown
with adverse impact on the organization's mission and its clientele
* Structure damage : A fire can destroy walls, floors, ceiling/roof
assemblies and structural support
* Knowledge loss : Books, manuscripts, photographs, films and other
archival collections contain a vast wealth of information that can
be destroyed by fire.
* Injury or loss of life : The lives of staff and visitors can be
endangered
* Public relations impact : Staff and visitors expect safe conditions
in heritage buildings.
* Building security : A fire represents the single greatest security
threat
To
minimize fire risk and its impact, we should develop and implement
comprehensive and objective fire protection programs.
Program elements should include fire prevention efforts, building
construction improvements, methods to detect a developing fire and
alert emergency personnel, and means to effectively extinguish a
fire. Each component is important toward overall accomplishment
of the institution's fire safety goal.
It is important for management to outline desired protection objectives
during a fire and establish a program that addresses these goals.
Therefore, the basic question to be asked by the property's managers
is, "What maximum fire size and loss can the institution accept?"
With this information, goal oriented protection can be implemented.

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