• LEAP CIP RC/PT Girder - CONBOX

    Document Information Document Type: FAQ Product(s): CIP RC/PT Girder Version(s): All Original Author: Bentley Bridge Technical Support Group TECH NOTES & FAQ RELATED TO LEAP CONBOX See Also Product TechNotes and FAQs External Links…

  • LEAP Bridge Concrete - CONSPAN, CONBOX, RC-PIER, CONSPLICE, and GEOMATH inside OpenBridge Designer CONNECT Edition

    LEAP Bridge Concrete is a consolidated version of LEAP Bridge Enterprise , plus all LEAP standalone products including CONSPAN, CONBOX, RC-PIER , and GEOMATH. In addition, CONSPLICE is also included as an add-on tool. The following new features have also…

  • Minimum f'c Report

    Minimum f'c Report This report shows the minimum required concrete strength to satisfy the compressive stress requirements. The required concrete compressive strength for top and bottom of the section are reported in separate columns. This report is…

  • Live load application to straddle bent

    I am designing a post-tensioned straddle bent. The superstructure has 6 girder lines. Is it possible to define a design truck using fixed axle spacing so it appears "stationary" to reflect the live load reactions from girders to a post-tensioned straddle…

  • Skew Correction Factor option

    Document Information Document Type: FAQ Product(s): LEAP CONBOX/ CIP RC/PT Girder Version(s): All Original Author: Bentley Bridge Technical Support Group - VM QUESTION: How CONBOX functions internally when Skew Correction Factor option is…

  • Column Design in Conbox

    Document Information Document Type: FAQ Product(s): LEAP CONBOX/ CIP RC/PT Girder Version(s): All Original Author: Bentley Leap Bridge Technical Support Group – VM QUESTION: Can CONBOX be used for column design of multi-column straight or…

  • Axial Forces -- Dead Load case

    Document Information Document Type: FAQ Product(s): LEAP Conbox Version(s): All Original Author: Bentley Leap Bridge Technical Support Group – VM QUESTION: What is the reason CONBOX is calculating the axial forces for Dead Load case? ANSWER…

  • Design of Post-Tensioned X-Beam/Box Beam

    Some state DOTs require x/box beams without CIP concrete deck to be post-tensioned, as illustrated by the image below. The post-tensioned check box in LEAP Bridge Concrete becomes inactive when X-Beam/Box Beam is selected as the beam type. How do I get…

  • UNKNOWN ERROR DUE TO SRPING STIFFNESS

    Hello! In the LAYOUT feature under GEOMETRY tab of CONBOX, I cannot continue the analysis whenever I set one CONNECTION as SPRING (with values). I am always ending up in an "UNKNOWN ERROR" message. Can someone please shed a light on this one? Many thanks…

  • "Load Name Must Be Unique" Error

    Hi, Dear All, After click on "Run Analysis", the error pop-up dialogue tells "loading name must be unique". Did you come across this problem, and how do we fix it? I couldn't figure out what is causing this... Please help. Thanks, Dong

  • LEAP Bridge Concrete CONBOX Live Load Distribution Factor Manual Input

    Hi, Dear All, I have a quick question on CONBOX live load distribution factor manual input. The bridge model has a tapered deck. So I am trying to enter in the linearly varying live load distribution factor. I wonder if I have to enter the LLDF at 10th…

  • LEAP Bridge Concrete CONBOX "Type Of Duct" Update Bug?

    Hi, Dear All, I found a bug when I tried to update "Type of Duct" in the CONBOX model as in the attached picture. I am able to update "Type Of Duct" and the "Friction Coeff" will be updated accordingly. However, after the model is updated and saved…

  • Sudden drop in Vc when providing flared sections in Conbox

    The bridge I'm analyzing has a flared girder and superstructure at the expansion piers. This is the cross section I have defined for this bridge: In order to directly obtain the area of steel required to resist direct shear; I removed the stirrups…

  • Self Weight Reaction

    In Conbox, when we select the Self weight reaction in the analysis model, does it include the self weight of the piers defined as well?

  • LEAP Conbox/Bridge Connect Concrete : Shear Calculation

    LEAP Conbox/Bridge Connect Concrete : How is the area of steel (Av/S reqd)required to resist vertical shear (Vs) calculated in the Detailed Shear Report when no stirrups are provided in a PT Box Girder design?

  • Upgrade to LEAP Bridge Concrete!

    LEAP Bridge Concrete now includes all of the individual LEAP modules that were previously sold separately (CONSPAN, CONBOX, CONSPLICE, RC-PIER, and GEOMATH.) With LEAP Bridge Concrete you can create 3D bridge models, perform analysis, design, and load…

  • Girder cross section in Leap Bridge

    Dear friend, The library of girder section on Leap Bridge or Leap ConSpan is so limited (Super T girder for example). Are there any solution to expand this one; it is a so wonderful if we can down load the extended library file for these program. If…

  • New Release - LEAP Bridge V8i SELECTseries 5 (v12.01.00.57) - now available

    LEAP Bridge v12.01.00.57 Enhancements: Introduced a new analysis option “Integral Abutment Bridge” in the Project tab. This option allows users to analyze and design integral abutments. Support for Pile Bent and Wall Pier Type abutments has…

  • LEAP Bridge V8i (SELECTseries 2) maintenance release v10.00.02.19 now available on SELECT

    LEAP Bridge v8i (SELECTseries 2) v10.00.02 is a maintenance release and incorporates the following fixes to itself and its component programs: LEAP Bridge v10.00.02 Fixes: Fixed an error in LEAP Bridge, where if the user selects EXIT option…

  • Several Question regarding Leap Bridge (Conbox or Conspan)

    Conbox——CB Conspan——CS In the CB/CS, these is no place to fill in the lane info, like width of lane, amount of lane, lane location (eccentricity to the ref line of bridge/center line of bridge), How the Leap CB/CS calculate these parameters?…

  • Re: COnbox: Side-by-side option

    The side-by-side option in CONBOX allows you to apply the provisions of LRFD Art. 4.6.2.2.5 Special Loads with Other Traffic. SBS: Side-by-Side live load responses use the following equations: · LLRsp = LLRsp(PermitLL) * DF1/Z + LLRsp(DesignLL…

  • New Release: LEAP Bridge V8i(SELECTseries 1) v9.0.0

    Release 9.0.0 of the LEAP Bridge Suite is scheduled to be released June 25, 2009. Several outstanding features are included in this release. Here is a brief list of some of the new features for this version : LEAP Bridge v 9.0.0 incorporates the…

  • LEAP Bridge V8i Release Enhancements

    LEAP Bridge v8.1.0 incorporates the following enhancements: • The ABC Wizard can now directly read in alignment, cross-section and profile information from LandXML files. The bridge model can now be generated very accurately directly utilizing…
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