TM 32-5985-343-14&P
Table 2-2. Tools and Materials Required for Installation - Continued
Item
Purpose
Applicable
publication
Wrench, torque, 0-200 ft-lbs
Tightens fasteners.
Wrench, torque, 0-600 ft-lbs
Tightens fasteners.
Concrete
Used for tower and erection piers.
Reinforcing steel
Reinforces concrete piers.
Table 2-3. Recommended Torque Values for
2-9 PRELIMINARY PROCEDURES.
Galvanized Steel Fasteners
CAUTION
Torque values
(ft-lbs)
Prepare a fine grain surface on top of
piers. Allow minimum of 28 days for
Diameter
Hi-strength
Standard
(inches)
the concrete to cure before erecting
tower.
Otherwise piers will not
1/4
9
6
5/16
17
11
adequately support tower and hoist.
3/8
30
19
7/16
47
30
a. The tower piers must be prepared by personnel
1/2
69
45
experienced in making steel-reinforced structures, and
9/16
103
66
with advice of civil engineers. The size of the piers and
5/8
145
93
the amount of reinforcing steel needed must be
3/4
234
150
determined from consideration of soil conditions and
7/8
372
202
vertical loads. Dig the pier holes and set the top of the
1
551
300
forms with a level. Wire in the reinforcing steel as
required. With the aid of a template, place the pier bolts
and hoist bolts in position while the concrete is still soft.
Table 2-4. Recommended Torque Values for
Refer to figure 2-2 for template hole patterns.
Stainless Steel Fasteners
b. If material is stockpiled, take care to protect it
Diameter
Torque values
from damage. Stack material before erection to provide
(inches)
clear working spaces and to enable rapid identification
1/4
79 in-lbs
of components.
5/16
138 in-lbs
c. To insure uniformity, all screw and bolt threads
3/8
21 ft-lbs
on attaching hardware should face in the same direction
7/16
33 ft-lbs
wherever possible (all outward, all inward, all up, or all
1/2
45 ft-lbs
down), unless otherwise specified. For proper tightening
of hardware, use calibrated torque wrenches, and
tighten to the torques recommended for the fasteners.
See tables 2-3 and 2-4 for torque values. Should socket
wrenches be used instead of torque wrenches, tighten
bolts by fully compressing the lockwasher and turning
the nut an additional one-half turn.
2-10
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