Critical Issues in CONSPAN v12.01.00.57

Critical Issues in CONSPAN v12.01.00.57

A couple of critical design issues have recently been identified in CONSPAN v12.00.01.57. Users should review these two issues carefully and verify the impact on prestress girder designs. These issues are being fixed, and the fixes will be included in a new release which will be available on SELECT at the end of July. If you have any questions or need additional information regarding these issues, please start a thread in the Bridge Design community forum.

1. Vertical Shear: When the option to use Simplified Shear procedure (LRFD article 5.8.3.4.3) is used, the design shear Vu was incorrectly using the shear corresponding to the maximum moment
   rather than the maximum shear. Since this could lead to potentially underestimating the shear reinforcement required, users should not use this option, and should use the other options available under Design Parameters / Moment and Shear Provisions tab, i.e. the Beta Theta Tables or the Beta Theta Equations method.
2. Live load distribution factor for multi-stemmed beams: When using Lever Rule the distribution factors were computed incorrectly by considering the distance from the edge of curb to the center of exterior web rather than to the center of the beam. This issue only affected exterior beams, and could be critical if the exterior beam governed the design.