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Revolutionary Tools for Concrete Bridge Engineering and Design


LEAP CONBOX Latest Release 


New Features in CONBOX v.8.0.0

  • Create designs according to Caltrans Amendments v3.06.01, requirements unique to the California Department of Transportation (Caltrans) that include some of the AASHTO LRFD 2008 Interim and proposed 2009 Interim revisions.

  • Major Caltrans amendments include:
    • Special STRENGTH II Limit State related to P5-P15 trucks
    • FATIGUE Limit State related to infinite fatigue life of concrete subjected to HL-93 fatigue truck
    • Revised resistance factor for tension-controlled, cast-in-place, prestressed concrete sections subjected to flexure and axial load.

  • Base the calculation of P-Jack on stress checks at the face of columns.

  • Report on secondary moments due to prestressing.

  • Perform analysis based on reduced effective moment of inertia for columns.

  • Calculate non-iterative, closed-form equations for beta and theta with the Modified Compression Field Theory based shear design procedure as prescribed in the 2008 Interim revisions.
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