Concrete Poles
Reinforced concrete poles are durable, corrosion-resistant and easy to install. They support heavier loads with lesshan light metal or fiberglass standards. Their rigid construction, from centrifugally spun casting procedures, produces greater density and superior strengths that prevent "wind sway".

The manufacturing process adheres to strict standards. The water used in the construction of these poles contains no harmful quantities of alkalines, oils or organic matter to ensure maximum integrity of the concrete. The standard mix is designed to reach 7,000 psi in 28 days with a 5%±1% air entraining. A minimum compressive strength of 3,500 psi is reached before transfer of prestressing force; then a minimum of 28 days compressive strength of 7,000 psi is achieved. When necessary, the poles are steam cured. The prestressing is done using stress-relieved wire strands with a minimum ultimate strength of 270,000 psi and a final prestress tension of at least 60%-70% of the ultimate strength. Concrete coverage of the steel prestressing cable shall be a minimum of 5/8" throughout the length of the pole.

Where minimum coverages cannot be maintained due to cable entrances, hand holes, wire outlets, etc., the prestressing cable shall be protected from corrosion with a moisture resistant sleeve or coating.