The Hume Pipe Company became their first agents and, while there were numerous international enquiries, South Australia remains the only place where they are widely used.
Why is it called a Stobie pole?
An engineering solution to the state’s lack of tall, termite-resistant hardwood for poles to carry power lines and telephone wires, the pole was designed by James Cyril Stobie, who joined the Adelaide Electric Supply Company in 1916 at the age of 21 years.
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.
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 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’.
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.
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 are old telegraph poles made of?
Telegraphs poles were originally made from straight tree trunks about 20 metres long. The part of the pole in the ground is often treated against rotting with creosote, etc. Poles are fitted with crossarms which may have 2, 4 or 8 insulators made of porcelain that support the wires.
What is the price of electric pole?
Jain said that the cost of the metal electric pole is around Rs 2,800 each, while spun concrete pole is estimated to cost between Rs 11,800-Rs 12,000 per pole.
How long does it take to grow a utility pole?
Most pole classes have larger diameter and height requirements than sawtimber. Growing a larger tree for poles typically requires a longer rotation (10–15 years). Longer rotations increase the time a landowner must carry establishment costs and increase the risk of severe weather damage to standing timber.
How tall is a utility pole?
2. The tallest utility poles in the world are 1,137 feet tall. They’re power line suspension towers on both sides of the Yangtze River in Jiangyin, China. Typical utility poles measure 30 to 60 feet for poles in residential neighborhoods, and from 60 feet to over 120 feet along major highways.
What does HP stand for on a power pole?
The HP sign indicates a hydrant on the path, whereas an HR sign indicates a hydrant on the road. A green H indicates that the hydrant is on the other side of the pole.
What do they treat telegraph poles with?
These poles are treated with AC500, which is a green water based pressure treatment similar to Tanalith E. Some telegraph poles may be creosote treated instead due to their large size but this is dependent upon the length of the pole and treatment tank.
What wood are telegraph poles made from UK?
Although Scots pine is the standard timber for telegraph poles in the United Kingdom a number of other species of timber have been put on trial from time to time. Scots pine (pinus sylvestris L.) also known as red- wood, is the timber almost exclusively used by the British Post Office.
What wood is a telephone pole?
Southern yellow pines and Douglas fir are the most popular trees due to their size, but Northeastern red pine, Western red cedar and other softwoods that grow tall and straight are also used.
How long does a telegraph pole last?
Wooden telegraph poles can last 100 years or more. Perhaps the oldest surviving one is 119 years old. Feeling sympathy for them? You can join the Telegraph Pole Appreciation Society for just a $5 one-off fee.
What does C mean on a telegraph pole?
Since 1964 telegraph poles have been affixed with a testing cycle sign (see left). This one was last tested in August 2006, test cycle G. What does the green ‘C’ mean? This pole was not planted deep enough. It is classed as shallow, climbable.
What is the span length of RCC pole?
ANSWER: 80 – 150 m.
What is the length of electric pole?
The standard utility pole in the United States is about 40 ft (12 m) long and is buried about 6 ft (2 m) in the ground. However, poles can reach heights of 120 ft (37 m) or more to satisfy clearance requirements.
What is the height of electric pole in India?
Classification of Pole | Height in Mtr. | Excavation of FootingDeftness in Mtr. |
---|---|---|
1 | 16.5 – 17 | 2.40 |
2 | 16.5 – 17 | 2.40 |
3 | 16.5 – 17 | 2.40 |
4 | 16.5 – 17 | 2.40 |
How big is a log?
Diameter of log small ends, inside bark | Length of logs (feet) | |
---|---|---|
8 | 12 | |
10 inches | 30 | 45 |
11 inches | 35 | 55 |
12 inches | 45 | 70 |
What is a pole sized tree?
Poletimber-size tree or medium tree – A timber species at least 5.0-inches DBH, but smaller than 9.0-inches DBH for a softwood, and smaller than 11.0- inches DBH for a hardwood.
Who owns the utility pole?
Many of the poles are jointly owned between PG&E and other companies, such as AT&T. Joint owners are members of the Northern California Joint Pole Association. Any added load to joint poles must meet the strength requirements set forth by California Public Utilities Commission (CPUC) General Order (GO) 95.
How much weight can a utility pole hold?
Class 1 poles range from 35 to 125 feet in length and have a minimum 27-inch circumference at the tip. Their horizontal load-bearing capacity is 4,500 lbs.
How many utility poles are in the United States?
Remember, there are an estimated 180 million utility poles around the United States today.