Pedestrian and Cycling Bridge in Neckartenzlingen, Germany
Customer Project
The S‑shaped pedestrian and cycling bridge across the Neckar river in Germany has a total length of 316 ft and a width of 10 ft with a straight middle part.
Investor |
Town of Neckartenzlingen, Germany www.neckartenzlingen.de |
Building and Structural Planning |
Ingenieurbüro Miebach Lohmar, Germany www.ib-miebach.de |
Traffic Planning |
Ingenieurbüro Blankenhorn Nürtingen, Germany www.ing-blankenhorn.de |
Construction |
Gottlob Brodbeck GmbH & Co. KG Metzingen, Germany www.g-brodbeck.de Schaffitzel Holzindustrie GmbH + Co. KG Schwaebisch Hall, Germany www.schaffitzel.de |
Dimensions
Model
Both foreland areas are bent in the ground plan and have a radius of approximately 214 ft. In this way, the course of access roads is considered in the ground plan.
Superstructure
The bridge superstructure consists of two stepped glued‑laminated timber beams coupled to each other and drilled to blocks. It spans three bays with individual spans of about 85 ft / 146 ft / 85 ft and a total length of 316 ft over the Neckar river.
For efficient material utilization, the cross‑section height is graduated from 31 1/2 inches up to 82 inches according to the loading. Due to the continuous structure, zero moment distributions result in the main bay. These were modeled as hinge (Gerber) joints. In this way, a reasonable transport size and a simplified assembly of the wooden structural elements were achieved.
Wood Protection
The supporting structure is optimally protected from weather conditions by its geometry (lateral stepping) and the top cover made from precast concrete panels (with lateral overhang, drainage channels below the structural joints, and an additional sealing level on the timber beams). In order to verify these wood protection assumptions, a moisture monitoring system was arranged in the area of the highest cross‑section.
Substructure
The substructure consists of reinforced concrete abutments with a bored pile foundation as well as the intermediate supports comprised of reinforced concrete columns built on shallow foundations. In the bridge structure extension, the path continues to a ramp with a trough-shaped supporting structure made of reinforced concrete.
Project Location
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New
Saving Models as Blocks in RFEM 6
In RFEM 6 it is possible to save selected objects, as well as whole structures, as blocks and reuse them in other models. Three types of blocks can be distinguished: non-parameterized, parameterized, and dynamic blocks (via JavaScript). This article will focus on the first block type (non-parameterized).

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Timber Design | Strength and Stability | Cross-Section Resistance Features
- Design of tension, compression, bending, shear, torsion, and combined internal forces
- Consideration of a notch
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- Design of curved and tapered members
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Programs Used for Structural Analysis