• Live Load Surcharge

    How exactly should the vertical component of LL surcharge on the footing be input? I have a 100 ft long footing (x dir) with a 9.75 ft heel (z dir). Per AASHTO, I'm using the equivalent of 2 ft of soil for the surcharge. There's 80 ft of clear roadway…

  • RC Pier

    When entering loads manually for a wall type pier, what is RC Pier referring to as cap loads? Is this the pile cap? Some load screens also have a tab for footing, so this does not seem to make sense. Is it the top of the pier even though a wall type pier…

  • RC Pier - Strength II Load Factors

    Why does the default load combination for Strength II have beta factors set to zero for LL+IM, CE, and BR? Shouldn't they be set to 1.35 per AASHTO 3.4.1-1?

  • RC-PIER Live Load Auto-generation verification

    Does anyone have calculation verification for the live load auto-generation function in RC-PIER? Or has anyone else had problems verifying the LL output from RC-PIER?

  • RCPier crashes on open

    I am using Leap Bridge Enterprise v14.00.00.09 in a Win7 environment. When I open the Geomath and Conspan modules, they work fine. When I open RCPier, it gets to a screen which says "Loading Project File" and then crashes, and it sometimes gives me a…

  • RCPier Cap design - shear and torsion

    The attached file shows the output from the cap design module of RCPier v14. Can you tell me why there is a point where phi*Vn=504 and Vu=72.5 yet phi*Vn < Vu? Is this result spurious or is there a reason for this? Also, how can I tell what the most…

  • LEAP RC-Pier Rotated Column on Pile Footing

    We are working a substructure design in which, due to the geometry of the roadway, it may be necessary to have the column rotated at an angle from the orientation of the pile footing on which it sits. In the past we've had to handle this via calculation…

  • Rigid link in RC-PIER

    A new feature of using rigid links in the structure model in RC-PIER has been added in LEAP Bridge Enterprise v14 per the request from Michigan DOT. Below are some basic facts about the new feature. A rigid link, simply put, is one which does not…

  • 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…

  • Load Factor applied to self weight

    In RC Pier, is it possible to apply a load factor to the self weight of concrete (for cap self weight in particular)?

  • RC-Pier Shear Design Checks

    Am I correct in assuming RC-Pier does not check columns for shear capacity? Why is this? Also, when checking footings for one-way and two-way shear, does RC-pier only check Vc? I'm being told footing stirrups are required, but don't see an option to…

  • 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…

  • RE: Solid Wall Pier

    Hi, I'm also trying to model a solid wall pier using LEAP RC-Pier V12.01.00.57. This version has the 'Wall Pier' option, however the generated wall design is coming up with rather impractical reinforcement layouts (#18 @ 12") oriented parallel to the…

  • Solid Wall Pier

    What is the best way to model a solid wall pier using RC Pier? I am thinking there are two possibilities: 1) Model short cap (1' height or less) and one column (non-tapered in x and z direction) centered on footing 2) Model short cap (1' height…

  • Auto-generation of wind load on structure (WS) per FDOT Structures Design Guidelines (SDG) 2013

    One of the new features added to the latest RC-PIER is the comprehensive auto-generation of WS loads and load combinations per the FDOT SDG 2013: An option for WS load auto-generation is now offered under the “Loads” tab. FDOT strength and service…

  • How to obtain the out-of-plane governing load case in the report of pile lateral resistance

    A few RC-PIER users recently asked questions about the two analysis options in the abutment design and the related footing design reports. Here is some clarification. In abutment design, when "Cap as continuous beam" is selected for the frame analysis…

  • Integral Abutment Feature in LEAP Bridge Enterprise

    Primary benefit of integral abutments is to offer joint-less bridges to improve the durability of the structure. The most common integral abutment type is the pile bent abutment. The connectivity with the abutments causes the structure to move as a whole…

  • Frame Analysis Method for pile cap abutment and pile bent in RC-PIER

    In general Frame Analysis method, cap is modeled as a beam and piles/stem walls are modeled as columns. In the “Cap as continuous beam” option, the cap is analyzed as a continuous beam. To mimic the continuous beam” analysis for the cap, the axial stiffness…

  • SELECTsupport TechNotes And FAQs

    Key: CS – Client Server Article FAQ – Frequently Asked Questions TB – Technical Bulletin TN – TechNote VID – SELECTsupport Video Bridge Design And Engineering Licensing General LEAP Licensing FAQ Bentley…

  • RC-Pier: Best way to input vertical wind loads on pier.

    I'm trying to apply vertical wind loads on a pier per AASHTO LRFD 3.8.2. The problem I have is with the load combination generation. This load shoud only be applied during Strength III and Service IV limit states. Is there a way to specify this for the…

  • RC Pier Column Design

    I cannot match the values that RC Pier generates for the column's moment magnification calculation for the Bd value (Ratio of Perm. Moment/Total Moment from AASHTO LRFD eqn 5.7.4.3-2). I have tried the minimum eccentricity from the AASHTO LFD code. I…

  • RCPier Navigating Windows

    In RCPier "Main" window, if I click "Diagrams", how do I get back to the "Main" window?

  • Re: RC-Pier Load Input

    This feature has already been added in RC-PIER and will be in v09.00.00.xx scheduled for release in May 2009. Users will be able to specify a text file from which the values can be read in from. This feature will be available for both LFD and LRFD, and…

  • LEAP bridge problems

    Hello all: I am having an extremely difficult time getting through my bridge design on LEAP bridge. Especially while working in GEOMATH and RC PIER. In GEOMATH: Problem #1: Back when I was trying to make minor adjustments to the geometry of the…

  • Cannot specify Lane Loads in RC-Pier

    When manually inputting live loads into RC-Pier, how do you specify a lane load. According to the help.... "For manually input live loads in AASHTO LRFD, this screen behaves slightly different. When a live load case is added in LRFD mode and edited, the…
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