[47192] in North American Network Operators' Group
RE: If you were in a government Cyber-warning center
daemon@ATHENA.MIT.EDU (Randy Neals)
Sat Apr 27 00:06:25 2002
Message-ID: <473B1201E090D511AE5100D0B747A487033956A8@yyzxch06.gt.ca>
From: Randy Neals <rneals@gt.ca>
To: "'David Lesher '" <wb8foz@nrk.com>,
"'nanog@merit.edu '" <nanog@merit.edu>
Date: Sat, 27 Apr 2002 00:03:51 -0400
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Errors-To: owner-nanog-outgoing@merit.edu
>Conduit? What's THAT ;-? Only exposed (bridge crossing, etc)
>parts are in conduit.
Conduit is typically used along the entire length of most railway builds I
have seen.
Most recent railway builds have been multi conduit projects with up to 12 x
1.5 inch HDPE conduits plowed in by rail mounted cable plow. Your correct
that steel conduit is used at bridge crossing or other exposed locations.
I understand that when railway routes became popular some years ago for
telecom that some railway/telecom companies did some research to understand
where to place the cable with respect to the rail to minimize damage in a
derailment.
Apparently by placing the conduit 3-4' down and relatively close to the rail
(ie: 2-3' from the rail) the steel rail will act somewhat as a shield to
minimize exposure of the cable in a derailment. (ie: the car has to rip up
the trackage and move the dirt to get to the cable)
-Randy
