Look-Out Tower Krkonoše, Czech Republic
Erlebnis Akademie AG
Stezka korunami stromů Krkonoše
Architecture office Josef Stöger
|Planning, Structural Engineering, Construction||
|Structural Analysis of Foundations||
STATIKA Jihočeská stavebně konstrukční kancelář s.r.o.
The tree-top trail in the Giant Mountains (Czech: Krkonoše) is the second experience path of eak (Erlebnis Akademie AG) in the Czech Republic.
Over a length of 1500 m, it twists through the treetops of the mixed mountain forest. It ends at a look-out tower with a height of around 43 m, and its platform offers a breathtaking view over the Krkonoše National Park.
It is possible to descend from the tower by using the barrier-free ramp or the 80 m long tunnel slide.
The unique feature of this project is the artificially created root cave below the tower, which offers insight into the world of the national park beneath the earth's surface.
As with all five previously built look-out towers of eak, WIEHAG GmbH from Altheim, Austria was again in charge of the planning, structural engineering, construction and assembly.
The look-out tower has the shape of truncated cone that opens out upwards. The outer diameter amounts to about 23 m at the bottom and about 37 m at the top.
The structure consists of an outer ring made of twelve curved glued‑laminated timber beams. They are rotationally symmetrically arranged at the same distance from each other.
The tower can be accessed from the tree-top trail, which leads through the cave beforehand. You can climb up to the viewing platform on a helix structure made of wood with a maximum gradient of 6 %. It is attached to the timber supports by steel cantilever beams. Between the individual steel cantilever beams, three glulam stringers covered with a wooden plank floor are fixed.
In the centre of the tower is a steel pylon made of a round tube, fixed at the bottom. A spiral stair made of steel and a tunnel slide are attached to it. The spiral stair serves as an emergency and escape staircase.
The look-out tower is stiffened by a circumferential web made of steel diagonals and ring structures.
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Programs Used for Structural Analysis
The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions
Timber design according to Eurocode 5, SIA 265 and/or DIN 1052
Stress analysis of steel members
Design of steel members according to Eurocode 3
Dynamic analysis of natural frequencies and mode shapes of member models
Stability analysis according to the eigenvalue method