Explain the detailed steps involved how elements are created in STAAD Pro and how are the inputs for sectional properties assigned?

To create elements in STAAD Pro and assign inputs for sectional properties, follow these detailed steps:

1. Launch STAAD Pro software and open a new or existing project.

2. Define the geometry of the structure by specifying the coordinates of the nodes. This can be done by using the graphical user interface or by entering the coordinates manually.

3. Once the nodes are defined, create members by connecting the nodes. Select the appropriate member type, such as beam, column, or truss, and specify the start and end nodes for each member.

4. After creating the members, assign the appropriate section properties to each member. This is done by selecting the member and accessing the properties dialog box. In this dialog box, you can specify the section type (such as I-section, T-section, or rectangular section) and enter the dimensions and material properties.

5. If the section properties are not readily available, you can define custom section properties by selecting the "User Defined" option in the section properties dialog box. This allows you to enter the moment of inertia, area, and other relevant properties manually.

6. Once the section properties are assigned, you can further refine the member properties by specifying additional parameters such as offsets, releases, and end conditions. These parameters affect the behavior of the member in the structural analysis.

7. Repeat steps 3 to 6 for all the members in the structure, ensuring that the appropriate section properties are assigned to each member.

8. After assigning the section properties, you can proceed with the structural analysis and design of the structure using STAAD Pro's analysis and design modules.

By following these steps, you can create elements in STAAD Pro and assign the necessary inputs for sectional properties, allowing for accurate structural analysis and design.