• non-linear material analysis in RM Bridge

    Hi all. How is non-linear material analysis n RM Bridge understood? Best regards.

  • the effect of cable sag

    Hi all. How does RM Bridge consider the effect of cable sag? Best regards.

  • allowable displacement of towers under live load

    Hi all. In the design of a cable-stayed bridge, what is the allowable displacement of the A and H shaped towers under live load? Best regards.

  • short-term and long-term composite cross-section

    Hi all. In composite steel girder bridges with concrete decks (continuous span bridges), does RM bridge automatically Calculator effective width of deck to calculate short-term and long-term composite cross-sections? best regards.

  • Steel composite bridge

    Hi all. I hava some question about steel composite brige as follows: 1. To calculator stress point of section, Rm Bridge automatic use short-term section for live load and load case type Non-permanent and use long-term section for load case type Permanent…

  • upward deflection of the continuous bridge structure

    Hi all. In continuous beam structures, the allowable downward deflection of the bridge under HL93 load is L/800. So may I ask what is the upward deflection of the continuous bridge structure under HL93 load? best regards.

  • Use No tens and ReloadSup functions in RM Bridge

    Hi all. in steel girder bridges combined with concrete decks (continuous span girder bridges). If the concrete deck is not in tension and the combination of internal forces according to the Service limit state is service.sup, then use the ReloadSup function…

  • Prestress Beam Design Mu-p/r Ration Greater Than 1.00 But Beam Failed

    I am designing a prestressed slab-beam bridge and the design output shows Mr/Mu ratio of 1.06, but the value is shown in red with asterisk next to it indicating the design is not acceptable (see screenshot below). I have not been able to figure out why…

  • Circular reinforcement pattern on Square Column

    Hi I am looking to design a square column on a drilled shaft/Caisson however the square column size is larger than the caisson and would like to introduce a circular longitudinal reinforcement pattern in the column, so it sits well into the drilled…

  • "RateF" improved for Imperial Units

    In OBD CE 2021 Release 2 and RM Bridge v11.13 was improved “ RateF” schedule action for Imperial Units. “RateF”, evaluates the load rating factor for the bridge structure according to AASHTO code. This action is currently only applicable for steel and…

  • RM Bridge Codes & Standards

    RM Bridge has many features from the specific national codes and standards inside its implementation that allows for the creation of: Materials Loads Load Trains Traffic Loads superposition with specific rules depending on the number of Lanes…

  • Spread footing design according to AASHTO 10.6.1.3 with multi column pier

    Hi, I am designing a multi column pier on spread footing in LEAP 20.00.00.58. I noticed that the option in A/D parameters of designing footing per AASHTO 10.6.1.3 disappears once multiple columns are specified in the model. Is this a bug, since 10…

  • allowed deflection of the bridge under the effect of live load

    Hi all. Nice to meet you. I have a model steel composite cable-stayed bridge with 6 span continuos by Rm Bridge V8, 2 side span have 150m, 4 main span is 300m. I don't known about allowed deflection of the bridge. I use AASHTO LRFD standard. If you…

  • Reinf crack for prestressed concrete

    Hi all. I have a question about Reinf crack for prestressed concrete as follows: If you calculator stress bot of section beam in MinMz_Service exceeding allowable stress tension limit is 0,5 x sqrt(f'c), you can calculator reinf area to control crack…

  • RCPIER deletes strut-and-tie model for hammer head piers upon return to main LEAP Bridge Concrete screen.

    When using RCPIER and the strut-and-tie model for hammer head piers my strut-and-tie model deletes after I exit RCPIER to the main LEAP Bridge Concrete screen even after saving and generating reports. How can I preserve my model upon exiting RCPIER? …

  • Can LARS Bridge load rate ACROW Truss?

    Can LARS Bridge load rate ACROW Truss?

  • Post-tensioned integral pier cap

    Hello, I was wondering if there is a way to design a post-tensioned integral pier cap for a steel I-girder bridge in Leap Bridge Concrete or any other LEAP software? Thank you for your help, Olya

  • Leap Bridge Steel Deflection Calculations

    Hello, I am new to Leap Bridge Steel and have a few questions: 1) What method is used to determine the deflections of girders for the HL-93(Deflections per AASHTO)? I am comparing the deflections for 2 girders with the same properties and the same…

  • LEAP Steel Load Case HL-93 vs HL-93 (Deflection per AASHTO)

    I am looking for the difference between Load Case "HL-93" vs Load Case "HL-93 (Deflection per AASHTO)". When running the reports, I see two parameters: HL-93, and HL-93 (Deflection per AASHTO). What is the program doing differently to these two cases…

  • What edition of AASHTO does LEAP Bridge Concrete use?

    Hellow, I need to use AASHTO LRFD Bridge Design Specs - 7th edition with 2015 & 2016 interim revisions for my project. I have following options and want to know the version which is appropriate for the project. 15.01.00.05 16.01.00.10 16.02…

  • AASHTO Code Verification

    Hello, I was wondering what edition of AASHTO is LEAP Bridge Concrete v16.00.00.24 using? I was unable to find it in the software itself so if it's possible to describe to me how I can find this within the program as well I would appreciate it. Thanks…

  • Post-Tensioning of AASHTO I Girder Type LEAP Bridge Concrete

    June 24, 2017 Dear Engineers, Greetings for all structural engineers in the world. I'm a bridge engineer from the Philippines and currently connected in a consulting firm. I'm using Leap Bridge Concrete for less than a month and find out that it…

  • LEAP Bridge Substructure/RC-Pier LFD Live Loads in the Negative Moment Region

    I am using the LEAP Bridge Substructure module to design a pier for a continuous 4 span structure using HS20 LFD loads. In the AASHTO Standard Specifications, it gives you a few options for the loading. One is that you can use a lane load with one concentrated…

  • Out-of-plane reactions distributed to pier columns for AASHTO LRFD with California option in Substructure

    A feature has been added in RC-PIER per the request from Caltrans. This feature is about how the out-of-plane reactions to external loads from superstructure are distributed to pier columns in an integral pier. For those loads which have both vertical…

  • 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…
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