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  • How to change the stress limits for the intermediate bent cap from normal exposure (=0.19 sqrt(fc) <0.6ksi ) to severe exposure (=0.0948 sqrt (fc)<0.3ksi) in leap bridge concrete

    I need to change the stress limits for the bent cap from normal exposure (=0.19 sqrt(fc) <0.6ksi ) to severe exposure (=0.0948 sqrt (fc)<0.3ksi)
  • Beam properties

    When we try to copy the beam sections (BT-54) without changing any properties, the strands layout is disturbed and few of the rows are disappearing. Original Girder section strand arrangement Name Changed Girder Section strand arrangement Top…
  • Tensile stress at the bottom flange for the Service III load case.

    Document Information Document Type: FAQ Product(s): LEAP CONSPAN Version(s): All Original Author: Bentley Technical Support Group -VM QUESTION: When the user runs a beam design and then changes nothing but the final concrete strength, he…
  • Live Load reactions shown in the output

    Document Information Document Type: FAQ Product(s): LEAP CONSPAN Version(s): All Original Author: Bentley Technical Support Group - VM QUESTION: Are the Live Load reactions in the Conspan output multiplied with Distribution Factor and Impact…
  • Error re-opening file LEAP Bridge Superstructure

    Hello, I need to run a flared girder analysis with two different beam types on the same span. I have been able to do this for a while without any issues, but now any new model I make with different beam types will give me an error when I re-open it…
  • Leap-Bridge Concrete: -nan(ind) error

    I get the -nan(ind) error during final stress check whenever I provide temperature load for the girders. Is there a solution to this issue? I am using LEAP Bridge Concrete CE 19.02.00.33.
  • 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…
  • Horizontal shear method and result

    I don’t know when I use “include beam and slab contribution in Vu” and “Exclude Beam and Slab contribution form Vu” why are V vh-rg values zero?
  • How to add/modify Height and/or # of strands for an existing Beam Section in Precast/Prestressed Girder Module?

    Here are the steps to add or modify strand location for Precast/Prestressed Beam sections: Open Precast/Prestressed Module Open the Beam Section library by clicking on Beam Section on the ribbon or by clicking on Libraries > Beam Section from menu…
  • LEAP Bridge Concrete v19 crashing and wiping model

    I'm working on a two-span prestressed PCEF bulb tee bridge for a state DOT in LEAP Bridge Concrete v19. I'm new to LEAP Bridge Concrete, but I've used other LEAP products. We're at the TS&L stage, and I'm trying to get the preliminary design of the superstructure…
  • LEAP Bridge Concrete DW loads

    How does LEAP Bridge Concrete calculate the reactions for DL-Comp. (DW)? I added up all the DW reactions and compared to a hand calc of utlities and overlay loads. The total DW is nearly 4 times greater than my hand calcs. I have 4 beam lines with 0.05…
  • LEAP Superstructure - Prestressing Development Length

    When calculating the top and bottom stresses at the transfer and bearings, does LEAP take into account the development length? It seems that the stresses its calculating at the bearings and the transfer are higher than what they should be. Does LEAP use…
  • Warning - Negative or 0.0ft beam spacings

    Can anyone help me with this error? I have defined spacing of beam w/o any -ve or zero entity but this error keeps on popping out.
  • Prestressing Tendons in Leap Bridge Concrete

    Is it possible to model a prestessed beam using two different sizes of strands. My top flange has 0.5" tendons pulled to 2000 lbs. However, the main reinforcing strands in the beam are 0.6" 270K LL. Is there any way to accurately model a cross section…
  • LEAP Bridge - Variable Depth Deck

    I am designing an adjacent box beam bridge with a variable depth deck in CONSPAN. I cannot figure out how to input a 4.5" deck thickness at the copings, and a 8.5" deck thickness at the structure centerline. Can someone please assist me with this task…
  • median between highway lanes

    Is there any provision of defining median or divider in a bridge model in leap ?
  • Composite Section for decked bulb tee?

    Hello, I'm designed a decked bulb tee and I notice that the composite section is the same as the beam section. The composite section should include the closure pours, but I can't seem to find a way to make this happen via the program or manual override…
  • LEAP Conspan - Elastic Gains

    In the hand calculations tutorial for elastic gains HC-37 None of the gains listed in my output can be matched when using the equation above. Has the equation changed recently and the tutorial not updated?
  • Conspan 10th points

    From what I understand Conspan calculates 10th point increments from the total precast length and not the bearing to bearing span length. Is there a way to get camber and deflection readouts at the bearing to bearing 10th points? All the DOTs in New England…
  • RE: Conspan Flared Girder

    Hi Rob, For Flared Girder geometry, first you need to toggle ON the Flared Girder option in the Project Tab: Then go to the Geometry tab and click on "Cross Section..." The Cross Section Layout dialog box allows you to define the curb data…
  • Detensioning Failure

    I have a single span bridge using I-girders that I need close to the max amount of strands in. These are all straight strands, and I've had to debond to 4 different lengths from the end. The longest debond is 25' of my ~90' girder. When I look at the…
  • Dimensions in Conspan

    In the GEOMETRY tab in Conspan the dimensions for the various views (cross section, plan ,elevation) are very tiny and cannot be read. Is there a preference setting to make this dimension text larger? Or another way? Thanks.
  • Wind Load Auto Generation

    I have created a Leap Bridge Enterprise file consisting of a 3 span precast girder Conspan Model, and single column bents with bent caps created in RC-Pier. I'm trying to generate WS loads from the Auto Generate feature. I assume the Wind Pressure for…
  • Double Truck in Conspan

    Hi, I'm wondering if CONSPAN considers 90% the truck load when running double truck as per AASHTO LRFD 3.6.1.3 for negative moments or does it take the full truck loads? AASHTO 3.6.1.3: "For negative moment between points of contraflexure under…
  • Leap Conspan V8i and Window 8

    Getting ready to update our system to Windows 8. Any issues with Leap Conspan V8i and Windows 8??