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  • RAM Frame Enhancement Request - Pseudo Flexible Diaphragms

    In RAM Frame, when assigning the load percentages for Pseudo Flexible diaphragms it will not recognize a frame number if that frame does not have a column in a particular diaphragm. Can we either get an enhancement to assign a column to multiple frames…
  • End Moments for Joist Girder Moment Frames

    We are designing a large warehouse type building with joist girder moment frames in both directions (however no columns are acting biaxially in frames). This is a large footprint building and thus lots of frames. We need to extract end moments (dead…
  • RAM Frame and NBCC 2015 4.1.8.11 4)

    Hi, Based on NBCC 2015 4.1.8.11 4) single storey buildings with steel or wood deck as diaphragms can have a higher fundamental period compared to 4.1.8.11 3) as seen in the snap below. However, in the current RAM frame the Ta is only based on clause…
  • RAM Structural System - Parapet Height in each direction

    How hard would it be to implement an X-Direction and Y-Direction parapet height? We work on many projects where we'll end up creating two models b/c the height differences can be pretty drastic between the two and using the higher of the two would be…
  • Building Weight for seismic calculation in RAM

    I have a concrete building with roof at different level acting as a rigid diaphragm. I am getting less building weight (7000kips) in RAM frame compared (10000 kips) to vertical reaction summary for dead load in RAM concrete analysis. II have hand calculated…
  • Stress and Internal Force Contours grayed out in RAM Frame

    Hello! I'm working on analyzing a simple structure in RAM Frame. The structure consists of 4 concrete walls and two stories. The concrete material specified is supposed to mimic hempcrete. I have analyzed the structure in RAM Frame and the deflections…
  • RAM Frame Response Spectra Eccentricity & Rotate Axes

    G'day, If you define a Response Spectra (Custom or Code) with a rotated axes do the eccentricities get similarly translated, perhaps rotated about the COM? I seeking to confirm that I am offsetting the mass by 0.1b perpendicular to the direction of…
  • ASCE 7, AISC 360, and the Effective Length Method in the RAM Structural System

    Note: This is a companion to the article, ASCE 7, AISC 360, and the Direct Analysis Method in the RAM Structural System . 27 June 2023: Corrections made in Step 4 for structures in Seismic Design Category B and Seismic Design Category D, and clarification…
  • ASCE 7, AISC 360, and the Direct Analysis Method in the RAM Structural System

    Note: This is an updated and expanded wiki based on the requirements of ASCE 7-16 and AISC 360-16. The wiki previously was based on older versions of those documents. 18 July 2022: Corrections made in Step 4 for structures in Seismic Design Category…
  • RAM Structural System - Load Distribution on Lateral Walls

    In RAM SS, how does the program distributes the lateral load (seismic and wind) in a rigid and non-rigid diaphragm? What are the differences in outcome with the different diaphragm types specified? My problem: In the picture below, I am showing a…
  • Controlling Fundamental Building Period

    I am running the seismic analysis for a 3 story structure and have questions about how to determine the appropriate building period to use for the seismic analysis. Gravity system is typical steel frame, with composite slab/framing at 2nd and 3rd Floors…
  • Moment Not Transferred To Beam Ends Correctly

    Hello, The moment in my frame does not seem to be correctly transferring to the fixed ends of the steel beams. All of the moment connections are set to a fixity of "XXX" and are lateral members. The ends do have moment values but seem to be way smaller…
  • Combined footing tutorials

    Hello Everyone Please share with me the tutorials about a combined footings
  • RAM Frame - Gravity Loads on Frame Members

    I have a system of "Other" walls that I'd like to pull line load reactions from. What is the difference between DL1 and DL2/ LL1 and LL2?
  • Mton/Cm to Kn/m

    How do I change Mton/Cm to Kn/m
  • movement joint modelling in ram ss (vertical load capacity without tension capacity)

    I'm modeling a concrete two-way slab structure including multiple permanent "movement joints" with Ram SS. In my model, movement joints are mostly located at the middle of spans and if I develop completely separated edges at each side of the joint,…
  • UC Ratio problem

    warehouse.zip wind calculation also in that folder.... try to fix this probem guys
  • how to get the loadings details in report????

    I have got my report, but there is no loading details like dead load, Wind loads and all... In report settings i have added Loadings, but its not showing.... Wt to do???? i want to see other load details. How to get that details?
  • UC Ratio problem

    Actually i need all members UC Ratio values. How to get all values???? Please guys guide me New folder (2).rar
  • how to reduce deflection????

  • Unbraced Length of Lateral Columns in RAM SS

    How shall we assign the unbraced length of lateral columns in a building with a mix of lateral and gravity columns supporting a flat slab? The building does have shear walls as well as a part of MWFRS. I know for gravity columns, it will be safe to…
  • RAM Frame crashes during analysis (wind load crash - seismic works)

    I have a pesky model that I've been working through. Originally having issues with a sloped semi-rigid diaphragm at the high roof, I eventually changed it to be flat in order to get a first pass on the model. Dead, Live, Roof, Seismic, COR, Eigen Solution…
  • RAM Frame Reactions for an "Elevated Building"

    I am designing the top level of a structure. I modeled a dummy structure below to ensure I was getting the correct wind loads. I need to get the reactions from my top level on the structure below. Using the reaction envelope feature doesn't work because…
  • Modeling and Analysis of Diaphragms

    Bentley Success Factors Webinar: Modeling and Analysis of Diaphragms Webinar Q&A Webinar Date: October 2017 Webinar Description Building structure behavior in response to earthquake or wind is heavily dependent upon the nature, extent and stiffness…