(ii)
Fly Guy:
When a line is to be erected along a road and the road turns towards the line side, the guy
will have to be provided towards the road side, which may cause obstruction to the road
traffic. In this case, the guy will have to be provided crossing the road with the required road
clearance. For this, either a pole piece of 15’ to 20’ will have to be erected on the other side
of the road and the guy from the main pole will be fixed to the top of this pole piece.
Sometimes the vertical clearance can be obtained by fixing the guy at a very large distance,
say 30’ to 40’, from the pole and bound with the anchor rod as in case of normal guy. This
type of guy may have to be used also at locations where there may be other obstructions
behind the line pole such as a small pond or low-lying area, which will necessitate fixing of
guy at a point beyond the above obstruction.
(iii) Strut Guy:
Sometimes, at locations such as in case of (ii) above, it may be more convenient to erect a
supporting pole known as a strut, on the deviation side of the line.
In this case, the guy wire is entirely dispensed with and the upper end of the supporting pole
is fixed to the line pole guy clamp suitably and bottom end is fixed directly in the ground in
slightly slanting position. The guy pole will be in compression in such case.
(iv) Bow-Guy:
This guy can be used where the angle of deviation of the line is small, and there is insufficient
space behind the pole to provide a normal guy. In this case, the guy is fixed either at the
bottom of the pole itself or to an anchor rod fixed about 2’ away from the pole. However to
provide the necessary tension, a suitable one-sided cross arm of about 2’ length is fixed at
middle of the pole and the guy wire is passed through the end of this cross arm support.
The different types of guys as above are illustrated in Drwgs. Nos. G-1 & G-3.
3.
Erection:
The installation of a guy involves the following work:
(1)
Excavation of guy pit and fixing of anchor rod.
(2)
Fastening guy wire to the pole and the anchor
(3)
Tightening the guy wire
(1)
The marking of guy pit for excavation, the excavation of pits and setting of anchor-rods in
the guy pits have to be carried out carefully.
The guy pits should be marked in the direction opposite to that of the conductor and at a
suitable distance from the pole. Where the angle of deviation is very small or very high, the
only guy or additional guys respectively have to be provided in the direction bisecting the
angle of deviation, so that the guys will balance the resultant stresses due to the conductors
in the two directions. The guy pits should be about 2’ x 2’ size and 5’ deep.
The stay rod should be placed in the guy pit in such a position that the angle of inclination
of the rod with the vertical face of the guy pit is 30º / 45º as the case may be. The bottom end
of the anchor rod should carry an angle or channel piece about 2’ long to provide extra
anchorage and the stay is concreted at the bottom for 1’ depth. Alternatively a concrete block
of 2’ x 2’ x 1’ (which has a hole in the centre to take the guy rod) is used. The remaining
portion of the pit is then back-filled with earth and ramming as in case of a pole. Marshy or
water logged locations of guy pits will have to be fully concreted. After this, at least seven
days should be allowed for settling.