OpenBridge Modeler

To create a custom deck template

To create a custom deck template for use with the US301 over RR bridge, do the following.

  1. On the Utilities ribbon tab, select the Decks tool from the Libraries group.

    The Template Creation dialog opens.
  2. Click the [+] (plus sign) next to the Standard Templates entry to expand the list.
  3. Right-click on the Deck Slabs folder and select Add Template from the pop-up menu.
  4. Type US301 over RR and click OK. The Template Creation dialog minimizes to clear space to start drawing your deck template.
  5. Click anywhere inside View 1. The view is opened and labeled OBM-TemplateEditor-temporary. The working point (WP) is clearly identified in the view.
  6. Draw a 62 ft wide by 9 in thick deck shape —center-top on the WP— to represent the deck cross-section.
    Note: It is important that you draw separate, 31 ft lines on either side of the WP. Do not draw dimensions in the template view (those below are for illustration purposes only).
    Tip: Expand the Drawing workflow in the Quick Access toolbar to display the MicroStation drawing tools.
  7. Select the Import template from model tool in the View 1: OBM-TemplateEditor-temporary window toolbar.
    The 2D drawing is imported back into the template library. The six points around the rectangle are labeled P_0 through P_5.
    Note: If prompted, click Yes to accept the changes.
  8. In the Template Creation dialog, set the slope for the left side of the deck:
    1. In the Point Details table, select the point name corresponding to the bottom, left corner of your deck (labeled P_4 in this example).
    2. Click the Mode button (currently labeled None+None). The Constraint Mode dialog opens.
    3. Select Horizontal in the left column and Vertical in the right column and then click OK. The Mode button and the Type fields are now labeled Horizontal and Vertical, respectively.
    4. Select top, left corner (labeled P_5 in this example) as the Parent point for both Constraints. There is no need to change the values as they default to the current distance between the two points, which we want to keep constant.
    5. Click Save.
    6. In the Point Details table, select the point name corresponding to the top, left corner of your deck (labeled P_5 in this example).
    7. Click the Mode button (currently labeled None+None). The Constraint Mode dialog opens.
    8. Select Horizontal in the left column and Slope in the right column and then click OK. The Mode button and the Type fields are now labeled Horizontal and Slope, respectively.
    9. Select Working Point (WP) as the Parent for both Constraints and type 0.0408 in the Slope Value field. Leave the Horizontal Value field -31.0000 as we want to leave that constant.
    10. Click Save. The left points shift down by approximately 0.5 in. The slope is exaggerated for clarity in the graphical view.
    Tip: The order of assigning constraints can be done in any order, but if the vertical constraints between the left-most points had not been assigned first, the deck edges would initially cross due to the slope exaggeration. Therefore, it is helpful to constrain any points that should have the same slope together first, then apply the slope. The similar approach applies to other constraint types.
  9. Repeat the process in Step 8 for the right-hand points, this time sloping up by 0.0408 ft (0.5 in).
    Tip: OpenBridge Modeler uses the convention that positive slopes to the right of the Working Point are up and to the left of the Working Point are down.
  10. Click Close.
Your deck slab template is now ready. You can now place this template by choosing US301 over RR in the Deck Template Selection.