Evolving transmission grid Field tower – economical ... - Fingrid
Evolving transmission grid Field tower – economical ... - Fingrid
Evolving transmission grid Field tower – economical ... - Fingrid
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Strength of steelon a concrete baseThe field <strong>tower</strong> stands firmly on four legs. Thefoundations of the <strong>tower</strong> are composed of twoprefabricated concrete sections joined together.This stabilises the <strong>tower</strong> structure. Separateconcreting work is not required, but the entirefoundation is built as prefabricated constructions.Each part of the foundation weighs 3 tonnes.In other words, the four-legged <strong>tower</strong> is anchoredto the ground using concrete foundations of 24tonnes.The <strong>tower</strong> is fastened to the four pillar elementsby means of anchor bolts. The mountingto the foundations and the loading of the <strong>tower</strong>have been tested by the Tampere University ofTechnology. The <strong>tower</strong> with its base weighs almost40 tonnes. There are a total of 17 conductors onthe <strong>tower</strong>: 9 phase conductors in the 400 kilovoltline and 6 in the 110 kilovolt line. There also 2overhead ground wires. The heaviest of these isthe 400 kilovolt conductor, which weighs 2 kilosper metre.The material efficiency of the foundations andsteel structure is also an environmental asset. Thework stages related to the erection and maintenanceof the <strong>tower</strong>s have been minimised, and thegoal is to schedule them at times when they causeleast harm to the farmer.The functioning, durability andsafety of the field <strong>tower</strong> have beensecured through a variety of tests.The test assembly of the <strong>tower</strong>revealed that the details certainlyfit into place.Harmony of shapein the landscapeFin<strong>grid</strong> is an international trailblazer in combininghigh-quality industrial design and technicalconstructions. Special-design <strong>tower</strong>s intended forbuilt-up areas and delicate landscapes are prominentexamples of the company’s approach whichrespects the environment. The oldest of these socalledlandscape <strong>tower</strong>s date from the 1990s.The field <strong>tower</strong> carries on the same open-mindedapproach which has also attained internationalacclaim.The new <strong>tower</strong> is transparent and airy. It has alesser impact on the landscape than the traditionallattice design. This is of importance when thereare many <strong>tower</strong>s in an arable landscape.Fin<strong>grid</strong>’s partners in the design of the new<strong>tower</strong> type have comprised the design agencyMuotohiomo Oy, Empower Oy which specialises inconsulting services in the energy industry, and theconcrete producer Betroc Oy.7