# Development of Railway Infrastructure BIM Prototype Libraries
## 6 Library Development and Test  
### Library Development  
The libraries were created based on railway standardized drawings, which are the basis for the work scope, so that the 3D models that could be applied to actual tasks could be implemented. Practical applicability was secured by enabling the creation of various shape models and the reuse of BIM models through the definition of the attribute items and parameters for each facility type. In addition, modeling was performed on a level at which the libraries and construction costs could be managed by linking the related items, such as the classification codes and construction costs.  
In accordance with the railway standardized drawings of KR, the libraries were created for the geometries of roadbeds, earthwork, bridges, tunnels, secondary work, and tracks. As explained earlier in the construction scope, for the formation level of the geometry of roadbeds and for tracks, one library is created for each task or type, and a drawing number is given to each file. As such, libraries for the ballasted track were created.  
Depending on the library type, the 2D-cross-section-based 3D type was constructed using Civil 3D while the 2D-profile-based and single-object 3D types were constructed using the two software versions of Revit and AECOsim. The libraries that used Civil 3D contained a total of 237 types in 43 files; the libraries that used the Revit software contained 525 types in 320 files (including the steel reinforcement model); and the libraries that used the AECOsim software contained 517 types in 312 files, resulting in a total of 762 types in 363 files. Table 7 shows the library status by standardized drawing task and facility type.  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multicolumn{2}{c}{**Standard Drawing**} & \multicolumn{4}{c}{**Form Number**} & \multicolumn{2}{c}{**Type Number**} \\ \hline \multicolumn{2}{c}{**Group**} & \multicolumn{1}{c}{**Drawing Name**} & \multicolumn{1}{c}{**Civil3D**} & \multicolumn{1}{c}{**Revit**} & \multicolumn{1}{c}{**AECO-sim**} & \multicolumn{1}{c}{**Civil 3D**} & \multicolumn{1}{c}{**Revit**} & \multicolumn{1}{c}{**AECO-sim**} \\ \hline \multirow{3}{*}{1. Geometric structure} & Gravel roadbeds & 12 & - & - & 84 & - & - \\ \cline{2-8}  & Concrete roadbeds & 5 & - & - & 34 & - & - \\ \hline \multirow{4}{*}{2. Civil engineering} & Standard cross-section and drainage & 8 & 8 & 6 & 17 & 28 & 26 \\ \cline{2-8}  & Rockfall prevention & - & 8 & 8 & - & 8 & 8 \\ \cline{2-8}  & Soundproof wall foundation & - & 3 & 2 & - & 8 & 7 \\ \cline{2-8}  & \multirow{3}{*}{3. Bridge} & Waterproofing and drainage & - & 2 & 2 & - & 2 & 2 \\ \cline{2-8}  & Common pipe channel & - & 2 & 2 & - & 2 & 2 \\ \hline \multirow{4}{*}{4. Tunnel} & Tunnel cross-section & 12 & - & - & 34 & - & - \\ \cline{2-8}  & Electric railcar & 4 & - & - & 56 & - & - \\ \cline{2-8}  & Drains and conduits & - & 6 & 4 & - & 8 & 6 \\ \hline \multirow{4}{*}{5. Retaining wall} & Gravity retaining wall & - & 2 & 2 & - & 9 & 9 \\ \cline{2-8}  & Semi-gravity retaining wall & - & 2 & 1 & - & 10 & 9 \\ \cline{2-8}  & Reverse T-shaped & \multirow{2}{*}{-} & Reverse training wall & - & 2 & 1 & - & 16 & 15 \\ \cline{2-8}  & L-shaped retaining wall & - & 2 & 1 & - & 16 & 15 \\ \cline{2-8}  & 6. Subsidiary works & - & 5 & 5 & - & 23 & 23 \\ \cline{2-8}  & Total & 41 & 42 & 34 & 225 & 130 & 122 \\ \hline \multirow{4}{*}{Track} & 1. Gravel roadbed & - & - & - & - & - & - \\ \cline{2-8}  & 2. Concrete roadbed & 2 & - & - & 12 & - & - \\ \cline{1-1} \cline{2-8}  & Total & 2 & - & - & 12 & - & - \\ \hline \hline \end{tabular}
\end{table}
Table 7: Developed building information modeling (BIM) libraries.