Concrete mast
A concrete mast is an overhead line mast or free-standing transmission mast made of reinforced concrete . Concrete masts are usually manufactured in the concrete plant using the spun concrete process and erected at the installation site. There are also concrete masts that are poured on site, the transition to concrete towers such as the Stuttgart TV tower is fluid; In contrast to concrete towers, the interior of concrete masts is generally not accessible.
In Germany, concrete masts are normally only used for power lines with operating voltages of up to around 30 kV. In exceptional cases, concrete masts are also used for 110 kV lines, both for DHÜ lines and for traction power lines. In Switzerland, concrete masts with heights of up to 59.5 meters (highest prefabricated concrete mast near Littau ) are even used for 380 kV overhead lines .
In- situ concrete masts are and were also used for structures over 60 meters high, such as a 66 meter high mast of a 380 kV line at the Reuter West thermal power station . Such masts are similar to industrial chimneys, and there are even constructions that also serve as chimneys. In China, some high masts of overhead line crossings of wide rivers were built as concrete masts made of in-situ concrete. The tallest of these masts belong to the Nanking Yangtze overhead line crossing with a height of 257 meters.
Concrete masts can also be found on railway overhead lines, in Germany with a round, in Austria with a rectangular cross-section.
Concrete masts as transmission masts are often used as radio towers for cellular networks and as antenna supports for television and radio transmitters of small to medium power.
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Concrete masts for low and medium voltage in downtown Groeba , 1914
Concrete overhead line mast with two 110 kV and two 20 kV lines
Typical appearance of a 110 kV pylon in the successor states of the former Soviet Union
Rope-braced concrete portal mast designed for 330 kV in the Ukraine
Concrete portal mast designed for 500 kV in Russia
The 59.5 meter high concrete mast in Littau
The concrete mast disguised as a chimney in Reuter-West
257 meter high concrete mast of the Yangtze River crossing
Solid concrete mast at Glomfjord , Norway
