Antenna Supporting Structure
The antenna supporting structure consists of four Rohn Industries 25G tower sections with a total height of approximately 12.8 m AGL. Antenna supporting structure construction commenced in early May 2008 and was completed in early July 2008. We use the Elk River p/n 56422 TowerMate LE Four D-Ring fall protection harness for all work on the tower.
Pictures of Installation
Tower foundation form built from 2x4 and 2x10 lumber.
The foundation
is buried approximately 1.1 m
using the "strong-arm" method. The form
is 1.2 m
square. This picture also shows the short tower section that is
embedded
in the foundation. Only one of the (16) #7 steel reinforcing
bars (rebar) is visible.
Foundation ready for tower erection. The foundation consists
of 1.9 cu. m (1.2 m x 1.2 m x 1.3 m slug) of poured
in-place,
reinforced concrete weighing 4,530 kg. A
"Mosquito Magnet"
may be
seen to the right of the foundation.
Gin pole, with line in place, used to raise tower sections,
rotator,
and antenna. An unrelated long-wire antenna may be seen crossing
the picture.
Four sections of Rohn 25G were erected using a gin pole
(previous
photograph).
The
top of the 1st section is supported by a house bracket
fastened
to the nearby storage shed (see next photograph). An unrelated
long-wire antenna may
be seen behind the tower.
Close-up of house bracket that provides lateral support at
3.05 m
above ground level.
Cable loom protects the coaxial cable and rotator control cable.
