What chemical is put on telephone poles?

four million poles) are treated with these chemicals each year. The three major chemical wood preservatives are pentachlorophenol (penta), creosote, and arsenicals (copper chromium arsenate, or CCA). A fourth, copper naphthenate, is considered an alternative.

How deep does a pole need to be in the ground?

Dig post hole so diameter of the hole is 3 times the width of the post (i.e., the hole for a 4” wood post should be about 12 inches wide). The depth of the hole should be 1/3-1/2 the post height above ground (i.e., a 6-foot tall fence would require a hole depth of at least 2 feet).

How much does a wooden telephone pole weight?

For a super hand-wavy, ballpark answer, let’s say it’s a pine pole, 30 ft tall and 1 ft in diameter (0.5 ft radius). The volume of that pole is 30 * pi * 0.5^2, so 24 cubic feet. The density of pine is ~30 lbs per cubic foot, so this hypothetical pole weighs 30 * 24 = 720 pounds.

How high off the ground are power lines?

There’s a specific rule for power lines and conductors where the voltage does not exceed 150 volts to ground. The required minimum clearance is 10 feet above finished grade or sidewalks, or from any platform or projection from which the lines might be reached (and are accessible to pedestrians only).

How deep are the power lines buried?

This is usually a 120/240-volt service for a residential or small commercial consumer. These wires are buried in a trench 24 inches deep when installed, measured from the top of the conduit or service wire to the top of the trench.

Is creosote bad for you?

Exposure to creosotes, coal tar, coal tar pitch, or coal tar pitch volatiles may be harmful to your health. Reports describing poisoning in workers exposed to coal tar creosote, or in people who accidentally or intentionally ate coal tar creosote prove that these chemicals can be harmful.

How tall are the street lights?

The streetlight mounting height was 25 ft (7.6 m). As in Specifier Reports: Streetlights for Collector Roads: The light loss factor is associated with a specific technology, as shown in Table 2. The pole spacing calculations assumed an R3 pavement type, which is a road surface classification given in RP-8.

How wide is a telephone pole?

For example, a class 1 pole has a minimum top circumference of 27 inches. If it is 25 feet long and cedar (most utility poles are cedar), the circumference measured 6 feet from the bottom must be at least 43.5 inches.

How many volts are in the power lines?

Typical voltages for long distance transmission are in the range of 155,000 to 765,000 volts in order to reduce line losses. A typical maximum transmission distance is about 300 miles (483 km). High-voltage transmission lines are quite obvious when you see them.

Why do they call it a guy wire?

It is also known as guyed wire, guy cable, guy strand and guy anchors. People also (mistakenly) call it guide wire. The name guy wire is derived from the term guy: defined as a rope, cord or cable used to steady, guide or secure something. Guy wire is a tensioned cable that is both lightweight and strong.

Is creosote oil flammable?

This creates a compounding problem, because the creosote deposits reduce the draft (airflow through the chimney) which increases the probability that the wood fire is not getting enough air for complete combustion. Since creosote is highly combustible, a thick accumulation creates a fire hazard.

Can creosote give you cancer?

Animal studies have also shown skin cancer from skin exposure to coal tar products. The International Agency for Research on Cancer (IARC) has determined that coal tar creosote is probably carcinogenic to humans. The EPA has also determined that coal tar creosote is a probable human carcinogen.

Why did they ban creosote?

Creosote banned after study on cancer risk. The European Commission has banned the sale of creosote-treated wood after it was found that there could be a cancer risk. Wood treated with creosote before the directive comes into force can be sold on the second-hand market.

What does creosote do to wood?

Creosote Wood Preservatives. Creosote-treated wood has either a thick black mixture of coal tar chemicals on the wood or the clear to yellowish greasy resin of the creosote bush. Creosote-treated wood can leach chemicals that may dissolve in water, move through soil and contaminate groundwater.

Why is coal tar good for skin?

This medication is used on the skin to treat the itching, scaling, and flaking due to skin conditions such as psoriasis or seborrheic dermatitis. Coal tar belongs to a class of drugs known as keratoplastics. It works by causing the skin to shed dead cells from its top layer and slow down the growth of skin cells.

Is coal tar cancerous?

Coal tar is an effective treatment for psoriasis and eczema, but it contains several carcinogenic compounds. This study has sufficient power to show that coal tar treatment is not associated with an increased risk of cancer.

What are the side effects of coal tar?

Common Side Effects of Coal Tar Topicals

  • Itching.
  • Burning.
  • Redness.
  • Staining of your skin or hair.
  • Sensitivity to sunlight.
  • Is coal tar toxic?

    Coal tar is a known carcinogen derived from burning coal. It is a complex mixture of hundreds of compounds, many of which are polycyclic aromatic hydrocarbons (PAHs) [1,2]. Experimental studies have found that application of and exposure to coal tar produce skin tumors and neurological damage.

    Is coal tar a carcinogen?

    Occupational exposure to coal tar poses an increased risk of developing cutaneous malignancies. The evidence of an increased risk of skin cancer in humans, as a result of dermatologic usage of tar, however, is conflicting. OBJECTIVE: A consensus on the carcinogenicity of tar is sought.

    Is nicotine is a carcinogen?

    Relevant human data are not available. The generally negative results in animal carcinogenicity tests lead to the conclusion that nicotine itself is not a significant direct, cause of cancer in people who use tobacco products, although nicotine could possibly promote cancer once initiated.

    Is benzene carcinogenic?

    The International Agency for Research on Cancer (IARC) is part of the World Health Organization (WHO). One of its goals is to identify causes of cancer. IARC classifies benzene as “carcinogenic to humans,” based on sufficient evidence that benzene causes acute myeloid leukemia (AML).

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