Original General Order 95
Appendix
D
Typical Communication Line Construction
Table 26
Replacement Ground Line Circumferences In Inches
of Sound Solid Wood For Communication Poles in Grade “F” Construction
This table is suitable for poles supporting cables; interexchange
lines (toll trunk and telegraph way wire); and exchange or local distribution
lines of more than 10 wires. The circumferences given in this table are based
on a safety factor of one–half, a modulus of rupture in bending of 5,600
pounds per square inch, and the maximum number of wires (0.104” in diameter)
shown in the headings of the respective columns.
|
Length of Pole(Feet) |
Span Length (Feet) |
Load in Number of Wires |
|||||||||||
|
1 - 4 |
5 - 10 |
11 - 20 |
21 - 30 |
31 - 40 |
41 - 50 |
||||||||
|
LL |
HL |
LL |
HL |
LL |
HL |
LL |
HL |
LL |
HL |
LL |
HL |
||
|
20 |
100 |
12 |
12 |
12 |
15 |
- |
- |
- |
- |
- |
- |
- |
- |
|
125 |
12 |
12 |
12 |
16 |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
150 |
12 |
12 |
12 |
17 |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
175 |
12 |
13 |
12 |
18 |
- |
- |
- |
- |
- |
- |
- |
- |
|
|
25 |
100 |
12 |
12 |
12 |
16 |
12 |
17 |
12 |
20 |
- |
- |
- |
- |
|
125 |
12 |
13 |
12 |
17 |
12 |
18 |
12 |
21 |
- |
- |
- |
- |
|
|
150 |
12 |
14 |
12 |
18 |
12 |
20 |
13 |
22 |
- |
- |
- |
- |
|
|
175 |
12 |
14 |
12 |
19 |
12 |
21 |
14 |
23 |
- |
- |
- |
- |
|
|
200 |
12 |
15 |
12 |
20 |
13 |
22 |
14 |
24 |
- |
- |
- |
- |
|
|
30 |
100 |
12 |
13 |
12 |
17 |
12 |
18 |
13 |
21 |
14 |
23 |
14 |
24 |
|
125 |
12 |
14 |
12 |
18 |
12 |
20 |
14 |
23 |
14 |
25 |
15 |
26 |
|
|
150 |
12 |
15 |
12 |
19 |
13 |
21 |
14 |
24 |
15 |
26 |
16 |
28 |
|
|
175 |
12 |
15 |
12 |
20 |
14 |
22 |
15 |
25 |
16 |
27 |
17 |
29 |
|
|
200 |
12 |
16 |
12 |
21 |
14 |
23 |
16 |
26 |
17 |
28 |
18 |
30 |
|
|
35 |
100 |
12 |
14 |
12 |
18 |
13 |
20 |
14 |
22 |
15 |
25 |
16 |
26 |
|
125 |
12 |
15 |
12 |
20 |
13 |
21 |
15 |
24 |
16 |
26 |
17 |
28 |
|
|
150 |
12 |
16 |
12 |
21 |
14 |
23 |
15 |
25 |
16 |
28 |
17 |
30 |
|
|
175 |
12 |
16 |
12 |
22 |
15 |
24 |
16 |
27 |
17 |
30 |
18 |
31 |
|
|
200 |
12 |
17 |
13 |
23 |
15 |
25 |
17 |
28 |
18 |
31 |
19 |
32 |
|
LL - Refers to Light Loading District, Rule
43.2
.
HL - Refers to Heavy Loading District, Rule
43.1
.