At a length of 4,921 ft, it winds through the treetops of the mountain mixed forest. It ends at a lookout tower with a height of around 141 ft, and its platform offers a breathtaking view over the Krkonoše National Park.
It is possible to descend from the tower using the barrier-free ramp or the 262-foot-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 lookout towers from eak, WIEHAG GmbH from Altheim, Austria was again in charge of the planning, structural engineering, construction, and assembly.
WIEHAG GmbH
www.wiehag.com
3D model of the lookout tower in RSTAB (© WIEHAG GmbH)
Lookout Tower
Number of Nodes | 1078 |
Number of Members | 1751 |
Number of Load Cases | 22 |
Number of Load Combinations | 200 |
Number of Result Combinations | 11 |
Dimensions (Metric) | 40.142 x 40.142 x 41.103 m |
Dimensions (Imperial) | 131.7 x 131.7 x 134.85 feet |
Program Version | 8.09.01 |
![Dlubal Center | Blocks](/en/webimage/028609/3237291/1_en.png?mw=512&hash=fd421b3f2c85d04e163841c3e5995f948391dd20)
![Creating Cross-Sections](/en/webimage/008719/1979290/01-en.png?mw=512&hash=65e98cfe859ce35a3e3e9da47a0ef9335401520e)
![Defining Nodes 1 to 4](/en/webimage/008816/769085/01-en.png?mw=512&hash=65e98cfe859ce35a3e3e9da47a0ef9335401520e)
![2.1 Effective Lengths - Truss Members](/en/webimage/007036/1590022/000280-en-png-png.png?mw=512&hash=69021112f394ffcd1320fcf7598e68a868b98df3)
After generating the effective lengths, the results are displayed in clearly arranged tables. You can modify the effective lengths manually there.
The Export function transfers the effective lengths to the RF-/TOWER Design add-on module for further calculation. The complete module data are part of the RFEM/RSTAB printout report. The report contents and the extent of the results can be selected specifically for the individual designs.
![Tower Model in RFEM](/en/webimage/007029/1589859/000269-en-png.png?mw=512&hash=bc1927fc2e9e38687a17f0857b06a720c45945bb)
Finally, it is possible to export the generated model to RFEM/RSTAB with a single mouse click.
The complete module data are part of the RFEM/RSTAB printout report. The report contents and the extent of the results can be selected specifically for the individual designs.
![2.2 Design by Cross-Section](/en/webimage/007039/1590107/000284-en-png.png?mw=512&hash=d15dc15c18c35113e29c373302e82142ae24c1df)
The results are displayed in clearly arranged module windows. In addition to the design data, the results include all design-relevant parameters. A parts list is generated automatically during the calculation.
The complete module data are part of the RFEM/RSTAB printout report. The report contents and the extent of the results can be selected specifically for the individual designs.
![Detailed Settings for Lattice Tower](/en/webimage/007038/1590084/000283-en-png.png?mw=512&hash=59fe2a3f1cb6b31e7a31fdfa7ddb5d8ff2e00962)
When performing the design of tension, compression, bending, and shear loading, the module compares the design values of the maximum load capacity to the design values of the actions. If the components are subjected to both bending and compression, the program performs an interaction. You can determine the factors according to Method 1 (Annex A) or Method 2 (Annex B).
The flexural buckling design requires neither the slenderness nor the elastic critical buckling load of the governing buckling case. The module automatically calculates all required factors for the bending stress design value. RF-/TOWER Design determines the effective critical moment for lateral-torsional buckling for each member on every x-location of the cross-section.