• Beam Slab (P/S or RC Concrete Girders):
  • LEAP Concrete — A list of the standard precast beam profiles included with LEAP Bridge Concrete. These shapes cannot be spliced.
  • Custom — A list of standard precast beam profiles from OpenBridge Modeler
• Beam Slab (Steel Girders):
  • Rolled Shapes — Select from the Section Property Catalog list of AISC wide flange shapes.
  • Built-Up — Define a built-up plate girder with optional cover plates. Tapered web depth and flange widths may be used.

In order to position the prestressed concrete beams accurately, and subsequently obtain accurate elevations for all substructure components, including bearings, bearings seats and piers, OpenBridge Modeler allows you to input the beam haunch at the center of the beam for both the start and end of each beam. If no bearings are input, the haunch thickness is modeled at the start and the end of the beams. However if the bearings are input, the haunch thickness input is considered at the bearing lines instead.

If the Compute option is checked, you can input a minimum clearance value and a residual camber value at erection, and the program will automatically compute the Haunch thickness values at both start and end of the beam. Minimum clearance is measured at the edge of the beam flange, and is verified all along the beam length.

Options to copy the values from one beam to others is also available.

Diagram showing location of measurement of Beam Haunch at along beam at start and end

Beam Haunch is measured at the center of the beam

Type a Minimum Haunch height. Minimum Haunch Height is measured at the CL of beam (in beam cross section). For both the left and right haunches of each beam, define the left and right extensions, and the edge type (Chamfered or Normal). For exterior beams, you can chose the option to "Follow Deck Edge" in which case, the haunch width automatically extended to follow the respective deck edge, to facilitate the modeling of thickened deck edges. An optional value for Deck Edge Vertical Offset can also be input, so the thickened portion of the deck can be modeled.

Click Insert Row After () or Delete Row () to control the rows added to the table.

If the Different End Template option is checked, you can specify a different beam section, and OpenBridge Modeler will loft the solids linearly for the section Length. Both start and end templates need to have the same number of points and start location of points for the loft to be created.

If a section is nonprismatic, you can use the slider control to select a point along the section length.