RAM SS Concrete Beam Design Criteria

I am having trouble telling RAM where to put a secondary layer of longitudinal reinforcement. If I assign a different value to 2 Layers in the Beam Criteria it appears to assign my values under 2 Layers just to my top bars. I have attached a screen cap of my Beam Criteria and a sheet from my Beam Design Summary to illustrate the issue. I am afraid I might have a fundamental misunderstanding that I can't find a clear answer for in the manual. 

Thank you.PDFPDF

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  • Thank you for your response.

    So that makes sense that it's just the dt for the two layers and I assume that the 2 layers are then separated by the code minimum. This was not something I inferred from reading the Concrete Beam FAQ before or after your response. 

    But then why would the program apply the 2 layer criteria to my top bars, but only the 1 layer criteria for my bottom bars? Does RAM look at the beam's deflection and override the 2 Layer criteria for bars located in the tension face?

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  • Thank you for your response.

    So that makes sense that it's just the dt for the two layers and I assume that the 2 layers are then separated by the code minimum. This was not something I inferred from reading the Concrete Beam FAQ before or after your response. 

    But then why would the program apply the 2 layer criteria to my top bars, but only the 1 layer criteria for my bottom bars? Does RAM look at the beam's deflection and override the 2 Layer criteria for bars located in the tension face?

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