November 19, 2015
Battered Retaining Wall Design
The batter dimensions can be set from Wall Footing Definitions:
November 10, 2015
How Do I Define Specific Member Sizes in RISAFloor?
RISAFloor is a design program in which it takes basic shape criteria about your beam or column members and then selects an optimal size to meet strength and serviceability criteria. However, the program can just as easily perform a design check for an as-built condition by defining specific member...
November 3, 2015
How to Investigate the Design Strip Results in RISAFoundation
In RISAFoundation, Design Strips are used to create regions in a slab for reinforcement design. Design strip size and shape is determined by the user, see the Help- Slab- Design Strip Width topic.
October 28, 2015
Tolerance Between SP Joists vs. Normal Joists
Have you been in RISAFloor performing a steel product design and noticed an (SP) extension to a joist designation? The following will discuss when the program designs for these special loading conditions.
September 22, 2015
Why Did the Wood Design Values Drop?
You may notice discrepancies in the wood design values when comparing RISA with the NDS 2012 and older versions of the code. The American Wood Council updated the wood design values in the Addendum, which supersede the values used in the NDS 2012 and previous versions of the Design Values for Wood...
September 16, 2015
How RISA-3D Calculates Member Deflection Ratios
After solving a model, you will see in the Member Deflections spreadsheet the following deflection ratios:
September 9, 2015
Why don’t the Beams in my Frame have axial force?
The beams in a lateral force resisting system, such as a braced frame or moment frame, typically carry a significant axial force. In the example below (with no diaphragms) the beam (M4) carries a significant axial tension.
September 2, 2015
How should I model beams in Revit to make them import into RISAFloor…
Revit offers two options for setting the elevation of beams. The way these are used has a significant impact on how those members are round tripped to RISAFloor, so it is important for you to use them correctly. The Level Offsets are available at each end of the beam. They can be modified through...
August 25, 2015
What does the Include Structure Weight Checkbox Do for Seismic Loads?
In the Seismic Loads dialog there is a checkbox for “Include structure weight in base shear”.