Comparison of loads for timber and Jerol composite poles
|
Light poles |
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|
Nominal length pole |
Assumed depth of planting * |
Diameter |
Ultimate load, unstayed |
Crippling load |
Torsion allowed |
|||||
|
Minimum at 1,5 m fr. butt end |
From butt end and 2 meter up |
At 0,6 m from top of pole |
At 0,2 m from top of pole |
Stayed |
Unstayed |
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|
m |
Redwood m |
Jerol m |
Redwood mm |
Jerol mm |
Redwood kN |
Jerol kN |
Redwood kN |
Jerol kN |
Jerol kN |
Jerol MPa |
|
7,0 8,0 |
1,2 1,5 |
2,0 2,0 |
160 170 |
216 216 |
4,31 4,40 |
7,36 6,09 |
45,9 39,7 |
160,8 110,4 |
40,2 27,6 |
110 110 |
|
9,0 10,0 |
1,5 1,5 |
2,0 2,0 |
180 185 |
216 218 |
4,46 4,23 |
5,20 5,02 |
32,8 26,6 |
80,4 62,6 |
20,1 15,7 |
110 110 |
|
11,0 12,0 |
1,8 1,8 |
2,0 2,0 |
195 200 |
221 224 |
4,40 4,26 |
5,01 5,01 |
24,5 20,8 |
48,3 43,4 |
12,1 10,9 |
110 110 |
|
13,0 |
1,8 |
2,0 |
210 |
268 |
4,46 |
5,16 |
20,5 |
61,8 |
15,5 |
80 |
|
Medium poles |
||||||||||
|
Nominal length pole |
Assumed depth of planting * |
Diameter |
Ultimate load, unstayed |
Crippling load |
Torsion allowed |
|||||
|
Minimum at 1,5 m fr. butt end |
From butt end and 2 meter up |
At 0,6 m from top of pole |
At 0,2 m from top of pole |
Stayed |
Unstayed |
|||||
|
m |
Redwood m |
Jerol m |
Redwood mm |
Jerol mm |
Redwood kN |
Jerol kN |
Redwood kN |
Jerol kN |
Jerol kN |
Jerol MPa |
|
7,0 8,0 |
1,2 1,5 |
200 210 |
8,53 8,29 |
89,2 80,7 |
80 80 |
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|
9,0 10,0 |
1,5 1,5 |
2,0 2,0 |
220 230 |
269 272 |
8,15 8,13 |
8,61 8,61 |
70,4 59,1 |
152,6 119,0 |
38,2 29,8 |
80 80 |
|
11,0 12,0 |
1,8 1,8 |
2,0 2,0 |
240 250 |
275 278 |
8,18 8,23 |
8,61 8,61 |
53,2 46,6 |
103,2 89,8 |
25,8 22,4 |
80 80 |
|
13,0 14,0 |
1,8 1,8 |
2,0 2,0 |
260 275 |
280 283 |
8,46 8,98 |
8,61 8,61 |
47,5 44,4 |
80,1 72,2 |
20,0 18,1 |
80 80 |
|
15,0 16,0 |
2,1 2,1 |
2,0 2,0 |
290 305 |
286 289 |
9,60 10,23 |
8,58 8,61 |
45,9 46,3 |
65,5 60,4 |
16,4 15,1 |
80 80 |
|
Stout poles |
||||||||||
|
Nominal length pole |
Assumed depth of planting * |
Diameter |
Ultimate load, unstayed |
Crippling load |
Torsion allowed |
|||||
|
Minimum at 1,5 m fr. butt end |
From butt end and 2 meter up |
At 0,6 m from top of pole |
At 0,2 m from top of pole |
Stayed |
Unstayed |
|||||
|
m |
Redwood m |
Jerol m |
Redwood mm |
Jerol mm |
Redwood kN |
Jerol kN |
Redwood kN |
Jerol kN |
Jerol kN |
Jerol MPa |
|
9,0 10,0 |
1,5 1,5 |
2,0 2,0 |
275 285 |
289 |
15,91 15,47 |
15,57 |
176,8 146,1 |
193,7 |
48,4 |
80 80 |
|
11,0 12,0 |
1,8 1,8 |
2,0 2,0 |
295 305 |
294 299 |
15.24 15.08 |
15,58 15,56 |
129.5 111.7 |
170,2 139,3 |
42,6 34,8 |
80 80 |
|
13,0 14,0 |
1,8 1,8 |
2,0 2,0 |
320 335 |
303 308 |
15.73 16.24 |
15,58 15,57 |
106.7 97.8 |
116,1 98,3 |
29,0 24,6 |
80 80 |
|
15,0 16,0 |
2,1 2,1 |
2,0 2,0 |
350 385 |
312 316 |
16.68 17.35 |
15,59 15,57 |
93.2 91.6 |
84,2 73,0 |
21,1 18,3 |
80 80 |
* The assumed depth of planting is not based on the necessary foundation design requirements. Values for poles of redwood taken from BS 1990-1:1984
