07.08.17.
18 thousand hectares of forest will be restored in Karelia this year.
  02.08.17.
Karelian company plans to displace reinforced concrete poles of power lines from the Russian market.
  02.08.17.
When a tree is harder than a stone. Karelia is ready to "stake out" Russia on the Finnish technology.

Comparison with reinforced concrete pillars

Comparative analysis of the reinforced concrete column "SV 95-3" and the wooden impregnated pole “Turva M9.5" of the Seesyarvskiy Poles Impregnation Plant.

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"Turva M9.5"

"SV 95-3"

1 Breaking load (moment of force) 7.5 tf*m 3 tf*m
2 Weight 266 kg 750 kg
3 Loading of vehicles 75 PCs 26 PCs
4 Loading railway transport 175 PCs 80 PCs
5 Total costs (1 – 4) 1 610 000 rub 1 043 500 rub
6 Service life 70 years 25 years
7 Total costs (1 – 6) 3 220 000 rub 1 043 500 rub

Calculation of the cost of installation of poles for 1 km power line (at rate of 20 poles per km)

1 Delivery by rail to the warehouse (at the rate of 100 000 rubles per railway carriage) 11 430 rub 25 000 rub
2 Delivery by road to the construction site at a distance of 100 km (at the rate of 20 000 rubles per car) 5 333 rub 15 385 rub
3 The installation of poles including grounding 4 500 ő 20 = 90 000 rub 6 000 ő 20 = 120 000 rub
4 Pole’s price:
 "SV 95-3"- 6 000 rub/pcs
“Turva M9.5" – 7 500 rub/pcs

150 000 rub 120 000 rub
5 Total costs (1 – 4) 256 333 rub 280 385 rub

Conclusion: taking into account all related costs for installation of 1 km of power transmission lines using wooden poles “Turva” is cheaper than reinforced concrete.

Reliability

  • Wooden poles are not prone to accidents due to ice-wind climatic loads, because withstand load 2.5 times higher than reinforced concrete pillars.
  • In the fall of the wooden pole doesn’t drags behind a neighboring, while the heavy concrete pillar brings down the whole anchor span (average of 8 pillars).
  • On average, due to reasons related to weather events (ice storms, hurricanes, storms, etc.), as well as in connection with accidents in the energy networks each year have to change about 1-2% of the total number of reinforced concrete poles.
  • Normative service life of poles:

reinforced concrete pillars – 25 years;
wooden impregnated poles “Turva” – 75 years


Annual savings from the use of wooden poles “Turva” instead of reinforced concrete for 1 km of power transmission line


1
Costs for the annual replacement of reinforced concrete pillars that fell due to weather conditions

0 rub 280 385 ő 1,5%= 4 205 rub
2
The annual amortization of power transmission lines

256 333 / 70 = 3 662 rub. 280 385 / 25 = 11 215 rub
3
Total costs

3 662 rub 15 420 rub

Annual savings in the exploitation of power transmission lines by wooden impregnated poles “Turva” with respect to reinforced concrete are 11 758 rubles per each km of power line. Given that the length of power transmission lines with a voltage of 0.4-10 kV even for a small power system is thousands of kilometers, the scale of savings and benefits from using poles "Turva" becomes obvious.