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2013-03-04

Skywalk Allgäu Treetop Walk in Scheidegg, Germany

Skywalk Allgäu is a path leading through the treetops of the Allgäu Alps in Southern Germany.

The steel and timber structure of the path about 1,000 m (3,281 ft) above sea level consists of cable-stayed and suspension bridge structures.

The dimensions shown below indicate the dimensions of the entire system.

Length: ~ 222 m (728 ft) | Width: 162 m (531.5 ft) | Height: 79 m (259 ft)
Number of Nodes: 1,578 | Members: 3,878 | Finite Elements: 4,625 | Materials: 7 | Cross-Sections: 51

The structural analysis of the entire steel structure was carried out using RFEM by the Dlubal Software customer Meyer+Schubart.

Structure

The 50 m (164 ft) high lookout tower has a triangular floor plan and pipe columns with a diameter of 508 mm (20 in), which are coupled with tubular cross bars and bracing in several planes.

At a level of 30 m (98 ft), the tower is additionally stabilized by full locked PV 150 cables manufactured by the German company Pfeifer. Visitors can access the path using the staircase or the glass-paned elevator.

Another, smaller tower structure, with a height of approximately 40 m (131 ft), is also based on a triangular floor plan (on the right in the image above). The tower is significant for stiffening the structural system and represents a fixed point for the connected access to the stairway (bridle path). The bridle path is a cable-stayed structure with three pylons that is less prone to vibration compared to the suspension bridge structure, which is especially important for safe use of the staircase.

Depending on the span lengths, the suspension cables of the suspension bridge have a diameter of 28.3 mm (1.1 in) to 26.3 mm (1.4 in). To prevent the guy lines with a length of up to 68 m (223 ft) from oscillating due to aerodynamic effects, they are partially stabilized with auxiliary cables, which are thinner than the main cables.

Finally, it is worth noting that the German company Biedenkapp Stahlbau won the M&T Metal Construction Prize in 2011 in the category for steel constructions.

Structural Engineering Meyer+Schubart, Wunstorf, Germany
www.meyer-schubart.de
Construction Biedenkapp Stahlbau GmbH, Wangen im Allgäu, Germany
www.biedenkapp-stahlbau.de
Architect Karlheinz Thurm, Stetten, Germany
Investor Skywalk allgäu gemeinnützige GmbH, Scheidegg, Germany
www.skywalk-allgaeu.de


Project Specifications

Model Data

Number of Nodes 1578
Number of Lines 2965
Number of Members 2965
Number of Load Cases 42
Number of Load Combinations 252
Number of Result Combinations 6
Total Weight 306.084 t
Dimensions (Metric) 223.329 x 163.456 x 79.420 m
Dimensions (Imperial) 732.71 x 536.27 x 260.56 feet
Program Version 5.01.00

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