More and more power lines are nowadays constructed in inaccessible terrain, amongst others, due to the commercial demands on land. Compounding this problem, environmental pressures prevent or prohibit the construction of servitude roads needed during the construction process. This necessitates the power line to be built with helicopter assistance.

Concrete foundations

Our purpose designed chutes, capable of delivering up to 1m³ of concrete are used to deliver concrete directly to foundations when it is impossible for the mixers to reach to work site.

The following scenario illustrates our production speeds.

• Helicopter type: AS350B3
• Distance between concrete mixer and foundation:1 km
• Altitude: sea level
• Average day temperature: 22°C.
• Concrete moved: 36 m³ ( 6 x 6m³ concrete mixers)
• Flight time: 2 hours 25 minutes.

Stringing

We utilise the suspension frame technique to lay pilot/lead wire. With a remote controlled baking mechanism, the pilot is in total control of the rig, preventing overruns of the reels. Because the rigs are designed for rapid interchange, little time is lost once a reel comes to its end. To facilitate simplified logistics, our stringing rigs are completely collapsible to enable us to transport the rigs with the helicopter during deployment.

Speeds of up to 250 meters per minute are achieved.

Lattice steel construction

Due to the ability of our pilots to hover with pin-point accuracy, we have developed techniques to perform aerial assembly of structures on-site when it is not possible to pre-assemble these towers.