Tree Tower Lipno, Czech Republic

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Model and deformation of tower in RSTAB (© WIEHAG)

Tree tower with connected tree-top walk (© WIEHAG)

View into inside of tree tower (© WIEHAG)

Customer Project

9 January 2013

Czech Republic RSTAB Towers and Masts Timber Structures

Structural Engineering	Structural Analysis of Tower WIEHAG GmbH Altheim, Austria www.wiehag.com Office for Structural Engineering Ing.-Büro Wolf GmbH Passau, Germany
Architect	Architect Josef Stöger Schönberg, Germany www.architekt-stoeger.de
Investor	Stezka korunami stromu s.r.o. Lipno nad Vltavou, Czech Republic www.stezkakorunamistromu.cz

In summer 2012, the first Czech tree-top walk was opened in Lipno in the presence of Václav Klaus who is President of the Czech Republic. A path with a length of 675 m leads to the major tourist attraction: the tree tower.

On the top platform at a height of 40 m, visitors can enjoy the wonderful view from the wooden look-out construction over the Šumava National Park and the Lipno Dam on the Vltava River. In its center, the tower includes a playground slide of 52 m length representing the longest closed slide in the Czech Republic.

Tree Tower

The tower construction consists of an external circular ring based on nine glued‑laminated timber columns which have been arranged in rotational symmetry and set up with an angle difference of 40° each, thus forming a polygonal, spatial structure.

Inside the tower, a steel pylon made of a round pipe has been built. 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: at 24 m and 40.175 m.

Visitors have access to the tower by either coming along the tree‑top walk ending at 24 m above ground or climbing the spiral stairway. Then, they can reach the viewing platform by climbing a spiral timber construction which 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. Furthermore, four horizontal ring constructions consisting of steel pipes have additionally been arranged in the lower part of the tower.