The structure consists of an outer ring made of nine glulam columns, which were set up rotationally symmetrically with an angle difference of 40° each, thus forming a polygonal spatial structure.

A steel pylon made of a round pipe was built inside the tower. Steel spiral stairs with steel grids and a tunnel slide are attached to the pylon, which is connected to the tower at two height levels: The pylon is connected to the tower in two places, at a height of 78.74 ft and a height of 131.81 ft.

Visitors have access to the tower either by coming along the treetop walk ending at 78.74 ft above ground, or by climbing the spiral staircase. From there, they can reach the viewing platform by climbing a spiral timber construction that is attached to the timber columns by means of cantilevered steel beams.

The construction has been stiffened by a close mesh of diagonal steel members anchored in the timber columns. In the lower part, four horizontally extending ring structures made of steel pipes were additionally arranged

WIEHAG GmbH
Altheim, Austria
www.wiehag.com

Model and Deformation of Tower in RSTAB (© WIEHAG)