Chapter 3: Hardware Requirements
Figure 3-1
Connection of tower section columns
A
First 4-Leg Section
10
Washer
B
Second 4-Leg Section
11
Nut
9
Bolt
3. The turn-of-the-nut method can be done in three steps.
• Snug tighten the bolts in the joint.
• Match-mark the nut and protruding end of the bolt.
• Rotate the nut by the value listed in the below table*.
Figure 3-2
Turn-of nut method
Bolt
Diameter
Bolt Length
Required
Turns
Bolt Length
Required
Turns
Bolt Length
Required
Turns
7/8"
l ≤3-1/2"
1/3
3-1/2" < l ≤ 7"
1/2
7" < l ≤ 10-1/2"
2/3
1"
l ≤4"
1/3
4" < l ≤ 8"
1/2
8" < l ≤ 12"
2/3
1-1/4"
l ≤5"
1/3
5" < l ≤ 10"
1/2
10" < l ≤ 15"
2/3
1-1/2"
l ≤6"
1/3
6" < l ≤ 12"
1/2
12" < l ≤ 18"
2/3
– For required turns of 1/3 turn (120 degrees) the rotation tolerance is +/- 30 degrees.
– For required turns of 1/2 turn (180 degrees) the rotation tolerance is +/- 30 degrees.
– For required turns of 2/3 turn (240 degrees) the rotation tolerance is +/- 45 degrees.
22
PNEG-2115
2-Leg and 4-Leg Towers
