Powerline & Aerial
Tower Markers
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SpanGUARD Rovel ABS - Features

BETTER COLOR RETENTION
SpanGUARDs are the best
power line markers on the market. Each marker is
constructed of Rovel ABS, a material that has 10 times
the weatherability and color retention of fiberglass.
Rovel ABS is much more durable, and unlike fiberglass,
will not crack if struck by gunshots. SpanGUARDs are
available in three colors: International Orange, White
and Yellow.
IMPROVED FEATURES
The new SpanGUARD/HeIiMARK
construction is a great improvement over the original
SpanGUARD method of attachment in that it is easier to
install, the design reduces freight costs and now
utilities can stock standard size marker halves and
install, as requirements change, various sizes of
Preform attachments for various sizes of lines. The
HeliMark still uses Rovel ABS plastic for greatly
extended color life. The difference between the original
SpanGUARD and the SpanGUARD/HeIiMARK is:
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The Preform goes
outward from each side of the HeIiMARK marker instead of
intertwining inside of the SpanGUARD marker. Fig. 3
shows how the Preform comes out of each end of the
HeIiMARK marker, outward from the marker. A permanent
attachment.
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The Preform is designed
specifically for the size, type and diameter of the line
on which it is to be hung. The unique SpanGUARD/ HeIiMARK Preform arrangement is bolted to the inside of
the marker. This allows the markers to be nested for
shipment, saving significantly on freight costs.
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Utilities can now stock
marker halves and different HeIiROD Preform assemblies
for different sizes of lines they might need in a hurry.
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New HeIiNUT locking
assemblies are provided so that the far side bolts are
installed on the ground, the markers slipped over the
line clamshell wise, and the installer does not have to
worry about loose nuts, bolts and washers to assemble
the marker up in the air. He simply uses a wrench to
tighten the near side HeIiNUTs.
Reflective tape can be
installed on the markers to make markers more visible at
night from helicopters and small planes. The
flashing lights of the aircraft make the light reflected
from the marker visible to the pilot.
CLAM SHELL DESIGN
The new SpanGUARD/HeIiMARK
clam shell design makes it easy to install power line
markers from helicopters, from buckets, from bosuns
chairs. First the Preform is bolted to the inside of the
marker, with the Preform going outward from the marker
instead of being inside of the marker. This enables the
installer to almost completely assemble the marker on
the ground. He installs the bolts on the far side of the
marker before the marker goes into the air. This leaves
only the three bolts nearest him to install up in the
air.
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