|Convicted||Federal motorway 71|
|Subjugated||Wipfra , Wiesenbach, Landesstrasse 2272 Ilmenau– Schmerfeld|
|construction||Composite steel bridge|
|overall length||450 m|
|width||2 × 14.25 m|
|Longest span||85 m|
|Construction height||2.5 m to 4.0 m|
|building-costs||29 million DM|
|start of building||2000|
The Streichgrund viaduct is a 450 m long girder bridge . It is located on the BAB 71 in the Thuringian Forest between the Ilmenau -Ost and West junctions and spans a valley with the natural biotope of the Streichtich, the Wiesenbach and the L2272 between the Ilmenau districts of Unterpörlitz and Heyda at a maximum height of 27 m.
The bridge is curved in plan, has a transverse gradient of 2.5% and rises towards Schweinfurt. It was built with two separate superstructures between 2000 and 2002. The cost was 29 million DM.
The span of the eight-span north superstructure is 35 m + 45 m + 55 m + 65 m + 85 m + 70 m + 54 m + 40 m, the south superstructure is 37.6 m + 48 m + 57 m + 70 m + 85 m + 65 m + 50 m + 37.4 m. The three middle bridge fields with the large spans above 57 m are haunched over two supports and have a maximum cross-sectional height of 4.0 m. The shorter edge fields have a constant height of 2.5 m. The superstructures of the steel composite bridge have a 5.5 m wide steel trough at the bottom and a 14 m wide haunched reinforced concrete deck connected with headed dowels .
- DEGES: Bridge structures in the new federal states . Ernst & Sohn, Berlin 2004, ISBN 3-433-01700-X .