## Education Archive

September 13, 2018

### Steel Design per AISC 15th Edition Steel Manual

The new AISC 360-16 15th Edition changes have been implemented into RISA-3D v17.0 and RISAFloor v13.0. To select this code for your design, simply choose them from the Codes tab within the Global Model Settings. A few notable changes in RISA between the 14th Edition and 15th Edition of the AISC code include: Updated shape database […]

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August 16, 2018

### Modeling Cables in RISA-3D

One of the support questions we get most often is, “How can I model a cable element in RISA-3D?” Cables that are straight and experience only axial loading can be easily modeled.  When modeling structures with cables (such as guyed structures) the cables can be modeled as tension only and doing so will ensure that the member […]

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August 2, 2018

### Governing LC for Shear in Concrete Columns

For concrete column members, the load combination producing the maximum shear code check is reported in the Detail Report and corresponding Results spreadsheet. Since concrete is evaluated based on a batch solution, this can be useful when shear governs the design. RISAFloor Concrete tab of the Column Results spreadsheet: Column Detail Report: RISA-3D: Concrete Columns […]

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June 28, 2018

### A Deeper Understanding of Deflection and Member Deflection Ratios

There are many different types deflection values calculated by RISA-3D.  Let’s take a deeper dive into each. Absolute deflection is the maximum absolute value for deflection in the member local lateral y- and z-axis. In engineering terms, this value is also commonly referred to as global deflection since it encompasses the entire movement of a […]

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June 14, 2018

### How Can I See My Applied Decks in RISAFloor?

RISAFloor does not record the applied deck in a spreadsheet.  To simplify modeling, it instead assumes a default deck is drawn within the entire diaphragm edge.  If you have an area that will be a different deck or a different span direction, then you are free to draw in over the default.  Whatever is drawn […]

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