## 4 Potentials and Challenges
### Comparison of the Concepts
\begin{table}
\begin{tabular}{l c c c} \hline \hline
**Citerion** & **TD** & **BD** & **Description** \\ \hline Small number of variants (individual components) & \(\bullet\)\(\circ\)\(\circ\)\(\circ\) & \(\bullet\)\(\bullet\)\(\bullet\)\(\circ\) & Compared to the BD, the TD uses a comparatively large number of different individual parts which are to be manufactured. \\ \hline Low complexity & \(\bullet\)\(\bullet\)\(\circ\)\(\circ\) & \(\bullet\)\(\bullet\)\(\bullet\)\(\bullet\) & The large number of individual parts in the TD results in them having to be precisely matched to one another during assembly. The BD uses less parts, but they are more complex to manufacture. \\ \hline Usage of commercially & \(\bullet\)\(\circ\)\(\circ\)\(\bullet\)\(\bullet\) & Due to the necessary inner height of the hollow profiles of the TD, the use of a conventional trolley is not possible. In this case, a special design is required in which the chassis is adapted accordingly. A conventional trolley can be used for the BD. \\ \hline Low manufacturing effort & \(\bullet\)\(\bullet\)\(\bullet\)\(\bullet\)\(\circ\)\(\circ\) & The production of the individual parts of the TD is less complex compared to the welded segments in the BD. Although more individual processes are required (e.g., cutting, edging and wedling), these are easier to implement. \\ \hline Easy component handling & \(\bullet\)\(\bullet\)\(\bullet\)\(\bullet\)\(\bullet\) & Due to the smaller dimensions of the TD components, they are easier to handle, i.e., they can be moved and mounted without additional equipment. The components of the BD, on the other hand, require additional handling equipment for larger dimensions. \\ \hline Short assembly time & \(\bullet\)\(\circ\)\(\circ\)\(\circ\)\(\bullet\)\(\bullet\) & The large number of individual parts in the TD results in a longer assembly time. \\ \hline Low assembly effort & \(\bullet\)\(\bullet\)\(\bullet\)\(\circ\)\(\circ\) & The smaller dimensions of the components in the TD allow them to be mounted more easily. The assembly of the components in the BD is more challenging and requires more effort. \\ \hline Transportation & \(\bullet\)\(\bullet\)\(\bullet\)\(\bullet\)\(\bullet\) & Both concepts allow the transportation of parts on EUR pallets. \\ on EUR pallets & \(\bullet\)\(\bullet\)\(\bullet\)\(\bullet\) & The weld seams on the TD are favorably positioned with regard to the load that occurs, since the wheel load is introduced directly into the weld of the Up-profile. In case of loss of the frictional force connection, however, the weld seam on the web plate of the bottom flange of the BD is subjected to particular stress ratings at the joints. \\ \hline Ensuring elastic stability & \(\bullet\)\(\bullet\)\(\bullet\)\(\bullet\)\(\bullet\)\(\circ\) & Both the web plates and the plates of the upper and bottom chord in the BD are exposed to high compressive stresses and can not to buckle. For this reason, they must be designed accordingly. In the TD, on the other hand, the hollow U-profines are designed robustly; only the compressive stresses in the web plates have to be taken into account separately. \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Qualitative assessment and comparison of the truss design (TD) and the box section design (BD) with respect to defined criteria; the number of filled points represents the fulfillment of the respective criterion.