Creating Thin-Wall Sections - PDS - Help

Interactive Section Tables Help

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This section type is used to create cross-sections for thin-wall members and add them to the active section table. IST calculates the engineering properties of the thin-wall sections you create and stores them in the active table. The cell file that is created of the cross-section is stored in the active cell library.

During the creation of arbitrary sections, thinwall sections, and volumes, the user can choose to create a designator. A designator is a symbol (triad) that is associated with the graphics used to create the section. Designators can be labeled with the section name. The properties associated with the designator can be reviewed by simply selecting the designator. When a designator is created, it is placed at the center of the section and indicates the directions of the principle axes of the section.

FrameWorks Plus does not support Thin-Wall sections.

Before Using This Option

  • Use MicroStation and draw the thin-wall section. You can use lines, arcs, line strings, or complex strings.

    IST does not check the elements that make up the section to see if they are closed --- it assumes that the elements are open.

  • You can create the graphics in 2-D or 3-D, in any view, on any level, using any weight and color.

  • Place a fence around the graphic. If you are in a 3-D design file, you must place the fence in the view in which the graphic was created.

Displaying Thin-Wall Sections

For a thin-wall section to display properly, the components that make up the section must follow these rules.

  • The components must form one continuous chain.

  • The components must be in order. For example --- the first component highlighted must be the start of the chain. The last component highlighted must be the end of the chain. All other elements in between must be in successive order.

  1. Click Section > Create Section.

  2. Select the thin-wall icon from the Section Type option.

  3. Type in a name for the thin-wall section to be created. The name can be up to 40 characters long.

  4. Click the Create Area Designator check box if you want to include this option.

    When a section is associated with an area designator, it is considered to be locked. To unlock the section, you must use the Designator - Disconnect command.

  5. Click Create.

    IST prompts: Place Fence Block Enter First Point

  6. Place a fence around the MicroStation graphics you have created to define the cross-section.

  7. Click Create.

    The first element of the selected graphics is highlighted.

    IST prompts: DB: 0.250 KEY: thickness

  8. Type in the thickness (in SU units) of the highlighted element of the selected graphics.

    The next element in the fence is highlighted. This step is repeated until there are no more elements in the fence to define a thickness for. The message Processing Thin-wall Section is displayed. When this process has been completed, the message Thin-wall Section Complete is displayed.

  9. Click data point to accept the displayed active thickness.

    The next element in the fence is highlighted. This step is repeated until there are no more elements in the fence to define a thickness for. The message Processing Thin-wall Section is displayed. When this process has been completed, the message Thin-wall Section Complete is displayed.

  10. Right-click reset to reject the highlighted element.

    The next element in the fence is highlighted. This step is repeated until there are no more elements in the fence to define a thickness for. When this process has been completed, the message Thin-wall Section Complete is displayed.