Figure 16: Concrete Anchors - Bergey Tilt Tower Installation Manual

equipment with earlier versions the BWC EXCEL1 towers. They were intended to be
installed manually with a stout bar through the eye or with a hand-held electric drive.
We have switched to Chance 8-Way Expanding Anchors because they can be used in a
broader range of soil conditions. The expanding anchors included with the tower are
suitable for installation in Soil Classes 3 - 6, and in some Class 7. If there is any doubt
about the quality of the soil, consider other anchoring options or consult the factory.
Concrete Anchors
A second option is to dig a hole about 2.5 ft square to a depth of at least 4 ft. You
should move the centerline of the hole you will dig back ~ 40" away from the center of
the tower to account for angle of the anchor rod.
Place the anchor as shown in Figure 16 (note: previous screw anchors are shown) and
fill the bottom of the hole with concrete to a depth of at least 0.3 meters (1 ft), covering
the bell and part of the rod. It is not necessary to expand the expanding anchors, but
you need to "shake" the anchor during the concrete pour to free trapped air. Reinforc-
ing rods should be incorporated in the concrete so as to provide adequate strength and
load distribution in the pad.
The backfilled earth should be tamped vigorously as it is returned to the hole.

Figure 16: Concrete Anchors

Towards Center Pad
~ 45 Degrees
~ 150 mm (6")
0.91 m (36")
for 9 & 13 m
Towers
1.14 m (45")
for 19, 25, &
32 m Towers
300 mm
(12")
Top View
750 mm (30")
Ground level
Screw-in Anchor
750 mm (30")
33