Seite - 96 - in Nikola Tesla and the Graz Tech

96 The interior is 35 metres long, 25 metres wide and has a clearance height of 21 metres. Behind the interior larger chamfered corners there are climbing aids and installations. For acoustic reasons, the laboratory hall is lined with acous- tic elements on the inside. On the western narrow side of the hall, a large two- leaf hydraulically controlled gate with a height and width of 14 metres enables the installation of large and heavy equipment. A single firmly anchored truss frame girder, similar in design to the hall frames, located at a distance outside this hall gate, has the function of a portal crane. Rails lead from the outer por- Fig.: High-voltage hall – interior view (photo: H. Tezak).