Member cross-section symbols are used in the Structure task.
All section tables delivered with the software use a specific set of cross-section symbols. Some section tables use all the cross-section symbols in the set; some tables only use a subset of the cross-section symbols. Each cross-section symbol has its own set of properties. When looking at a section table workbook, you can determine the cross-section symbol that is being referenced by that particular sheet by looking at the SymbolDefinition entry at the top of the sheet.
The cross-section symbols are delivered with the reference data software in the [Reference Data Folder]\SharedContent\CrossSections folder. You can create your own custom cross-section symbols, sometimes referred to as arbitrary sections, using the 2D Symbols utility that is delivered with the software.
The software uses the simple physical representation of the cross-section symbol to display the member geometry in the model. You can change the display representation using the Selected Aspects option of Format > View.
The delivered symbols contain a detailed physical representation. This representation is available only for marine models, and is not used for plant and materials handling models.
The delivered symbols also contain a production physical representation. This representation is available only for marine models in the Structural Manufacturing task, and is not used for plant and materials handling models.
For more information, see Cross-Section Symbol Representations in the 2D Symbols User's Guide.