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I am using AASHTO LRFD and IDOT does not have conventional longitudinal reinforcing in their PPC IL-Beams, but IDOT does consider bonded prestressing strands as sufficient in resisting the temporary tensile forces in prestressed concrete before losses…

Hi If we define bar length, is leap bridge software have capability to deduct development length based on dia of bar and calculate flexure check at that point.

I am analyzing a pier supporting 2 simple spans that are 45 degree skewed. 1. I am confused what offset needs to be entered in superstructure definition? 2. How is this offset playing a role in LL generation? I noticed that changing offset is changing…

I am performing a load rating of concrete box girders. The rating factors/tons is not displayed since the Inventory Design Load Rating Factor > 1. Is there an option to make the program display the factors even if the RF is greater than 1 or is that information…

Hello, I have 95 ft long and 12 ft wide abutment footing on 2 rows of piles. Abut stem is 88 ft long. How is the Leap program calculating Dist (ft) , dv, Vu and Phi Vc for X and Z ? I will appreciate the response. Thanks,

How does LEAP Conspan apply multiple presence factors if live load distribution factors are entered manually? If distribution factors are entered manually, is it up to the user to apply the multiple presence factor to the manually inputted distribution…

Hi, I am trying to design prestressed concrete 78" Girder with 8.25" Slab thick. my Prestressing steel centroid is Ypg=9.88 in and total section height H=86.25" so my dp=H- ypg=86.25-9.88=76.37". I have no mild reinforcement in the girder, so dp=de…

How does leap concrete bridge calculate the deflection due to live load on prestressed concrete girders below cast in place slab. I tried all types of presence factors, aashto... etc . Could reach to similar results

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…

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.

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…

Hello, I am designing a multi-column pier substructure for a bridge. The substructure model is connected to the superstructure so I am able to auto-generate the superstructure dead load, Braking load, and Permit Live Loads. However, the button to generate…

Hi I am designing 2 span continuous bridge with FIB 54 beams by opting full continuity, disregards restraining moments option. After analyzing and iteration of strand pattern and providing huge negative steel, i am not able to reduce tension stress…

Occasionally when I print beam design results, I will get zero camber and deflection values reported in the design summary. I have to go back and rerun the analysis and that clears it up. Is this bug documented and is there a fix?

What is the difference between the stresses given for the depression point in the "Release Stresses" box and the "Release Lifting Loops" box?

I'm running a curved bridge in LEAP Concrete. The begin and end bents have different skews resulting in variable girder lengths. LEAP suggests running the, "Girder-by-Girder" analysis. However, when running this analysis my girder is failing, miserably…

I hope this is an easy question regarding the shear stirrup spacing... Does the program insert a stirrup at the start location specified? For example, in the image below, is there a #3 2-legged stirrup provided at 0.00', 0.25', etc. or do the stirrups…

We've run into an issue where files created in the Precast/Prestressed Girder module in LEAP Bridge Concrete sometimes are not able to be opened after we save and come back to our work. We attempt to open the file and it will begin to load, then it stops…

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…

In the Shear/Moment Envelope (&Reactions) Design output what is the difference between live load Max, Truck, and Lane? Is the max HL-93 including truck and lane loading? I have a 6 span continuous concrete superstructure.

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…