Concrete, the basic ingredient in our products is a construction material that consists of cement, aggregate (generally gravel and sand) and water. Concrete solidifies and hardens after mixing and placement due to a chemical process known as hydration. The water reacts with the cement, which bonds the other components together, eventually creating a stone-like material. PCC Poles are essentially made of concrete which are inevitably less costly and more economically maintainable than the conventional steel poles. PCC poles were one of the first ventures of our company since from 1979 and we are the leading manufacturers in Northern India catering to the states of Gujarat, Rajasthan, Odisha, Maharashtra, and Delhi-NCR. The company has attained specialization in the production of PCC Poles having over 40 years of experience in the same and is well equipped with the standardized plant and machinery. It offers a wide variety of poles which includes the following:
Codes and standards :-
All items of work under this contract shall, unless otherwise specified elsewhere in the contract, conform to the latest revision and / or replacements of relevant Indian Standard specification and code of practices. The works under the contract comply with the relevant provisions made in the following Indian Standards or the latest versions thereof.
- IS: 1678-1998 Specification for prepossessed concrete poles for overhead power traction & telecommunication lines.
- IS: 2905-1989 Methods of test for concrete poles for overhead power and telecommunication lines.
JdVVNL & MES Discoms specifications :-
By which these poles are been manufactured in our works time to time, & may be customized as per the requirements of our customers depending the possibility by our engineer.
Aggregate (coarse or fine): Aggregate (coarse or fine) as to be used in manufacture of PCC poles should conform to IS: 383-1970. They shall be hard, strong, dense, durable, clear and free from veins and adhering coating and free from injurious amount of disintegrated pieces, alkali, vegetable matters and other deleterious substances.
Cement: The cement used in the manufacture of per-stressed concrete poles shall be Ordinary Portland Cement conforming to IS: 8112 or IS: 12269. Cement shall be stored at site in well covered sheds in such a manner as to prevent deterioration due to moisture or due to intrusion of foreign matters.
H.T. Wire: H.T. wire of diameter 4 mm. having a minimum ultimate tensile strength of
17500 kg/cm2 shall be used as per approved drawing for manufacture of the PCC poles.
Water: Water should be free from chlorides, sulfates, other salts and organic matter.
Potable water will be generally suitable.
Curing of Poles- Curing of poles shall be commenced after setting of the concrete. The poles preferably are taken to curing vats carefully (so that no pole is damaged) for continuous curing under cold water for 25 days or so to achieve the desired strength. Separate eye hooks are provided for handling, lifting and transport, one each at a distance at the end of the pole. If steam curing is used, it must be done under careful control and special precaution.
Calibration- The instruments / equipment required for Testing shall have valid calibration certificate issued by National Test House or equivalent Government Laboratory.
HT-LT Line Pole
The electric lines that generate the most public interest are often high-voltage transmission lines. These are the largest and most visible electric lines. Most large cities require several transmission lines for reliable electric service. Transmission lines are larger than the more common distribution lines that exist along rural roads and city streets. Transmission line poles or structures are commonly between 60 and 140 feet tall. Distribution line structures are approximately 40 to 60 feet tall. There are several different kinds of transmission structures.
Transmission structures can be constructed of metal or wood. They can be single-poled or multi-poled. They can be single-circuited, carrying one set of transmission lines or double-circuited with two sets of lines. Different transmission structures have different material and construction costs, and require different right-of-way widths, distances between structures (span length), and pole heights. Construction requirements and costs also vary with the different sized voltages. In the past, many transmission lines were constructed on H-frame wood structures and metal lattice structures. New lines are most often constructed with single pole structures because of right-of-way width limitations and environmental considerations.
Pole height and load capacity limitations determine the distance between poles (span length) either on the basis of ground clearance or ability to support heavy wind and ice loads. In areas where single-pole structures are preferred, weak or wet soils may require concrete foundations for support. Where a transmission line must cross a street or slightly change direction, larger angle structures or guy wires may be required.
Poles with guy wires impact a much larger area. Angle structures are usually more than double the diameter of other steel poles. They are made of steel, usually five to six feet in diameter, and have a large concrete base. The base may be buried ten or more feet below the ground surface. The diameter of the pole and the depth the base is buried depends on the condition of the soils and the voltage of the line.