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May 16, 2019

When using semi-rigid diaphragms in a RISAFloor/RISA-3D model, it is possible to see negative moments at the ends of pinned beams as a result of the link between the semi-rigid diaphragm and the beam-column connection. In RISAFloor, semi-rigid diaphragms utilize internal rigid links to create a 12in by 12in “rigid zone” around the column location […]

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January 17, 2019

RISAFloor is the RISA Building System’s floor design software which allows users to design with composite decks, elevated concrete slabs and more.  When paired with RISA-3D, the two create a complete solution for the analysis and design of multi-story structures, including two buildings on the same podium. Equivalent Lateral Force/Static Force Procedure After the definition […]

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October 15, 2015

This video will show you how to layout wood diaphragms in RISAFloor and get the design and deflection results in the lateral model in RISA-3D.

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April 15, 2015

New in RISA-3D V13 is the ability to detach a wall panel from a diaphragm. In the Wall Panel Editor there is a button to Toggle Diaphragm Attachment.

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March 10, 2015

RISAFloor Concrete Floor Slabs can design be transferred into RISA-3D for lateral design using either a Rigid Diaphragm or Semi-Rigid diaphragm. In RISA-3D, the wind and seismic loads are calculated and then applied into the diaphragm level to distribute the forces to the Lateral Resisting System. For example, looking at the plan view of a […]

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Posted in Technical Solutions, What's New | Comments Off on What is a Semi-Rigid Diaphragm?