Why does South Australia use Stobie poles?
The Stobie pole was central to the speedy expansion of Adelaide Electricity Supply Company’s supply. It was cheap and simple to produce, had a uniform appearance, saved an enormous amount of timber from being harvested, had a long life expectancy and, at the time, was seen as more environmentally sensitive.
How are Stobie poles made?
Stobie’s design, patented in 1924, consists of two perpendicular lengths of steel-channel section held apart by bolts, the intervening space filled with concrete which protects the steel from corrosion and gives the whole structure its unforgiving near-indestructibility.
Can you paint Stobie poles?
Before painting a Stobie pole you should consider: That not all Stobie poles are suitable for painting. Approval has been obtained from SA Power Networks. Approval has been obtained from the local council where the pole resides. The painted image shall not be higher than 2.0 metres from ground level.
What are Australian telegraph poles made from?
The majority of power poles are made from Australian hardwood timbers such as Spotted Gum, Ironbark, Blackbutt, Grey Box, Tallow Wood and Blood Wood.
When was the Stobie pole invented?
1924
In 1924 Stobie invented the ‘Stobie pole’ to carry electricity cables and telegraph wires. It was constructed of two steel-I beams, held together by tie bolts; the space between them was filled with concrete.
Who invented electricity poles?
Anyone know?) Francis Robert, inventor of the first working electric telegraph, is also credited with having erected the first poles in 1816, suspending eight miles of cable in western London.
What is the meaning of Stobie?
Scottish: habitational name from Stobo near Peebles in southern Scotland, so called from Old English stubb ‘tree stump’ + holh ‘hollow’ or halh ‘nook’, ‘recess’.
Why are telegraph poles Green?
Poles pressure treated with a preservative have a natural round shape and are a green (CCA) or a black (creosote) colour. When the timber is cut, it is readily apparent if the sapwood of the timber has been pressure treated with preservative (see Figure 3).
What trees are telegraph poles?
Most poles come from hardwood trees such as iron bark, white mahogany and spotted gum and are sourced from native plantations on the NSW north coast.
What is the price of electric pole?
The cost of an 8 meter RCC pole is 4,500 and for 9 meters the cost is 5,500 rupees. The cost of an 8 meter PCC pole is 3,500 rupees and the cost of a 9 meter PCC pole is 4,500 rupees.
Can you burn telephone pole wood?
Yes, they can, but it might not be desirable. Power poles are generally treated in some manner to prevent rot and seal them against exposure to the elements. Creosote is one commonly used treatment. These various treatments often produce noxious fumes when burned.
What is the strength of a Stobie pole?
Stobie pole strength in the strong direction may be up to 4.5 times the weak direction strength. Small holes through the concrete enable attachment of modular cross-arms, insulators and other hardware. The poles are fireproof, rotproof, and termiteproof.
What is stobie’s design?
Stobie’s design, consisting of two perpendicular lengths of steel-channel section held apart by bolts, the intervening space filled with concrete which protects the steel from corrosion and gives the whole structure its unforgiving near-indestructibility, was patented in 1924.
Who is Bob Stobie?
After obtaining an engineering degree from the University of Adelaide, Stobie went on to become chairman of the South Australian division of the Institute of Engineers, and manager for engineering research in the Electricity Trust of South Australia.
What is the history of the Stobie drill?
It was invented by Adelaide Electric Supply Company engineer James Cyril Stobie (1895–1953). Stobie used materials easily at hand due to the shortage of suitably long, strong, straight and termite-resistant timber in South Australia.