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Technical Solutions Archive

October 4, 2018

RISA-3D v17.0 now has the ability to model partial fixity member end releases. Partial fixity end releases can be utilized in RISA to model the behavior of a partially restrained or semi-rigid connection that cannot be idealized as fully fixed or pinned. Partially restrained connections are common in seismic moment frame systems and their semi-rigid […]

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Posted in Technical Solutions, What's New | Comments Off on Partial Fixity End Releases in RISA-3D

October 2, 2018

The new AWC NDS 2018 code has been implemented into RISA-3D v17.0 and RISAFloor v13.0. To select this code for your design, simply choose this code from the Codes tab within Global Model Settings.   After solution, the results are available in the Design Results spreadsheet. You can also verify the code selection used in […]

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Posted in Technical Solutions, What's New | Comments Off on Wood Design per AWC NDS 2018 Wood Code

September 20, 2018

RISAFoundation v11.0 now includes the added ability to enter a passive pressure for slabs. The passive pressure represents soil pressure along the perimeter of the slab and will contribute to the sliding resistance of the slab. RISAFoundation will multiply the passive pressure by the vertical area along the slab’s perimeter in both the slab’s local […]

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Posted in Technical Solutions, What's New | Comments Off on Passive Resistance for Mat Slabs

August 23, 2018

“Why am I receiving a P-Delta instability error when I run my DL + LL load combination? I don’t see this error when I run my lateral load only combination.” This is a very popular question that we receive in technical support and it is quite understandable. Why would the model solve with a lateral […]

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Posted in Technical Solutions | Comments Off on P-Delta Instability with Gravity Only Loads

July 26, 2018

Have you ever received error message 2054 when modeling in RISAFloor? This error means that the program has detected an unsupported deck edge, but often there is confusion about what this means.  RISAFloor expects that you have either a beam or a wall parallel to every deck edge in your model. This allows for the […]

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Posted in Technical Solutions | Comments Off on How to Troubleshoot an Unsupported Deck Edge