Impregnation process – in a high-pressure autoclave by the “vacuum-pressure-vacuum” method in accordance with the BS EN 8417 norms.
Impregnating compounds:
– Water-soluble impregnation compound CCA (antiseptics composition: chrome, copper and arsenic compounds);
- Water-soluble impregnation compound without arsenic (antiseptics composition: copper compound);
- Creosote.
Antiseptic penetration depth – not less than 100% of sapwood layer width.
Service life of wooden poles – 40 years.
Pole length in meters |
Class of supporting towers |
||
Light (L) |
Medium (М) |
Stout (S) |
|
Least diameter in the upper end in mm |
Least diameter in the upper end in mm |
Least diameter in the upper end in mm |
|
6.0-6.5 |
120 |
160 |
195 |
7.0-7.5 |
120 |
160 |
195 |
8.0-8.5 |
120 |
160 |
195 |
9.5-10.0 |
120 |
160 |
195 |
11.0 |
120 |
160 |
195 |
12.0 |
120 |
160 |
195 |
13.0 |
120 |
160 |
195 |