The reinforcement cages for the masts are produced on a computer-controlled cage-welding machine. The completed cage is then inserted in the lower half of a steel form. After installation of the required additional components in the concrete forms, the prestressing tendons are pulled in, fastened on both ends of the form at the prestressing anchors, and then slightly pretensioned.

After filling of the form with high-strength concrete (up to C100/115), the form is closed, and its two halves are bolted together. The prestressing tendons are then pretensioned to their final tension with respect to the firm. The entire form is then lifted into the centrifuge unit, and the spinning process begins.

An electric motor rotates the concrete in its form at approx. 600 rpm, for around 10 minutes. This process spins the fresh concrete with 20 g against the wall of the form. The centrifugal forces produce a hollow core at the centre axis of the concrete mast.

After the centrifuging process is complete, the concrete masts are left in the form and are removed after they have reached reverse tensioning strength.

This special production process achieves great compressive strength with very small cross-sections. The external concrete surface is nonporous to the naked eye.

Please see the details in our flash video on production.

Production of special colours and surface finishes

Spun-concrete poles and masts from Europoles offer you a wide selection of colours. This is possible by adding pigments to the white cement. Special stone-like surface textures are produced by addition of precisely selected aggregate, followed by surface finishing.

At Europoles, sandblasting, chiselling, bushhammering, or polishing gives your columns a completely individual touch. By using special inserts in the concrete forms, we can also produce absolutely unique structures: such as tree-trunk imitations or logos and script.