Colorado

Beam shapes and LRFD configuration for Colorado DOT

PGSuper Professional Only

This PGSuper configuration is included with PGSuper Professional and implements beam shapes and LRFD settings as per the Colorado Bridge Design Manual, in addition to the AASHTO LRFD Bridge Design Specifications - 9th Edition, 2020).

Implemented Girder Shapes

  • Bulb T
  • Colorado Bulb T (all shapes)
  • Box Girder
  • Slab Girders
Colorado CBT Beams

CBT Beams
BT Beams

BT Beams
Box Girders

Box Girders
Slab Beams

Slab Beams

Assumptions and Limitations

  • Based on CDOT Bridge Design Manual, January 2020.
  • As per above, project criteria is set to the AASHTO LRFD Bridge Design Specifications, 9th Edition, 2020
  • Railing, sidewalk, and pedestrian load are distributed evenly to all girders
  • Colorado Permit Vehicle applied in the Strength II limit state
  • Concrete unit weight for girders set to 163 pcf
  • Average Ambient Relative humidity set to 55%
  • Losses computed using the LRFD Refined Estimate (5.9.3.4)
  • 5.5.1.3 Concrete Stresses - Girders shall be designed such that there is no tension in the concrete under dead load acting alone, at service limit state, and after losses. This provision applies to top and bottom of girders in precompressed tensile zones only. This is implemented in PGSuper
  • Rating criteria has not yet been input. Users needing to perform rating analysis must input parameters manually in order to perform rating analyses. Feedback on recommended rating parameters is appreciated. 
  • Checking and automated design for lifting and hauling is disabled
  • Strand slope check is disabled
  • Harped strand hold down check is set to 4.0 kip per strand per CDOT criteria

PGSuper Set Up Instructions

This configuration is included in PGSuper Professional and its use is restricted to licensed users only. PGSuper Professional users can access the configuration as follows:

  • Open PGSuper Professional
  • Click File | Configure PGSuper
  • Select the PGSuper Professional sever
  • Select the Colorado library

References

Revision History

  • January 1, 2021 - Initial Release

Developer

  • BridgeSight Staff

Disclaimer

IN NO EVENT WILL WE BE LIABLE TO YOU FOR ANY DAMAGES, INCLUDING ANY LOST PROFITS, LOST SAVINGS, OR OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OR THE INABILITY TO USE THE SOFTWARE (EVEN IF WE OR AN AUTHORIZED DEALER OR DISTRIBUTOR HAS BEEN ADVISED OF THE POSSIBILITY OF THESE DAMAGES, OR FOR ANY CLAIM BY ANY OTHER PARTY.

SOME STATES DO NOT ALLOW THE LIMITATION OR EXCLUSION OF LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.