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It looks
like a mini mountain range rising from the prairie
northeast of Denver. It's total area is 53 square
miles, twice the size of Manhattan. There were 110
million cubic yards of earth moved. The project
attracted interest from people around the world;
both detractors and supporters. Many of the local
people thought the project would never be completed.
It was one of the most ambitious of its type in the
world; The Denver International Airport. Which it
took several years and several billion dollars more
than initially budgeted, it opened in February 1995
and is recognized as stat-of-the-art.
Many construction techniques were new and will
probably be used as lessons, both good and bad, for
builders of this type of facility throughout the
world. Many of the processes and components used
were untried. The baggage handling system is
probably the most publicized example of the things
that can go wrong in such a major undertaking.
However, the fire detection system chosen to protect
this vital artery has been successfully proven for
more than 55 years. The system chosen to protect the
tunnels through which baggage and critical
facilities support flows is a Protectowire Linear
Heat and Fire Detection System. |
Protectowire is a fixed temperature Linear Heat
Detector. One might think of it as an infinite spot
detector. Every centimeter of its length can detect
an report an overheat or fire. The Linear Detector
was installed on load-bearing stainless steel
messenger wire mounted in standoffs on either side
of the tunnels - a total of over 3 miles of
detector. The Protectowire system is able to
pinpoint the exact location of an overheat and
convert this location into footage. This in turn
reports to the total facilities management system
where the problem can be identified and handled.

Click to enlarge. |
The Protectowire
System was installed by Allwest Systems, Inc. in the
last half of 1993 as part of a complete facilities
management system; a contract of more than $10
million. Allwest systems, Inc. is a Denver-Based
contracting company with the capability to provide a
complete package, including fire protection, sound
CCTV, and facilities management. After being
installed, the Protectowire System operated without
incident until it was called upon in 1994. One of
the 2,100 linear induction motors failed and caused
a severe overheat in the utilities tunnel. The
Protectowire Detector sensed the overheat, went into
alarm, and sent the appropriate signals. While no
baggage was being handled at this time, the
Protectowire System also activated a relay causing
the system to shut down, preventing possible spread
of burning material to another area via the baggage
rails.
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