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2018-03-08

Lookout Tower at Treetop Path, Steigerwald

The lookout tower, with a height of more than 131 ft, is located in Ebrach (Upper Franconia), in the heart of the Steigerwald.

After the Spessart, the Steigerwald is  the second-largest deciduous forest area....

After walking along the 165-foot-long treetop path, visitors can use the spiral ramp to climb the tower. Once at the top, visitors can enjoy a unique view over the world cultural heritage site of Steigerwald.

Structure

The lookout tower has the shape of a truncated cone that opens outward as it increases in height. At the tower base, the outside diameter amounts to about 66 ft and at the top, to about 105 ft. The main supporting elements form 12 curved glulam timber trusses which are rotationally symmetrically arranged in an angular difference of 30°.

The outer spiral structure, made of timber, is fixed by steel cantilever beams to the timber supports. At a height of about 39 ft is a half-pace, which is supported on diagonal braces made of steel.

The viewing platform at the top consists of steel cantilever beams, protruding to the inside, and longitudinal glulam timber stringers lying in between, with planking.

The structure is stiffened by a circumferential web made of steel diagonals and ring structures.

Investor Bayerische Staatsforsten AöR
www.baysf.de
Architect Architectural office Josef Stöger
stoeger-koelbl.de
Planning, Structural Engineering, Construction WIEHAG GmbH
www.wiehag.com
Structural Analysis of Foundations Ing.-Büro Wolf GmbH
D-94036 Passau, Germany


Project Specifications

Model data

Number of Nodes 1245
Number of Members 1957
Number of Load Cases 10
Number of Load Combinations 157
Number of Result Combinations 8
Dimensions 125.76 x 123.92 x 135.6 feet
Program Version 8.13.01

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