OBM- Beam Definition- Girder Placement – Haunch Thickness & Minimum Clearance.


Document Information

Document Type: FAQ

Product(s): OPEN BRIDGE MODELER

Version(s): All

Original Author: Bentley Technical Support Group -VM

QUESTION: In Beam Definition - what is haunch thickness and Minimum Clearance?

ANSWER:

 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.