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June 20, 2019

When modeling building structures using steel or composite steel floors, engineers typically utilize rigid diaphragms to distribute lateral loads (wind and seismic) to lateral load resisting elements such as shear walls, moment frames and braced frames.  Rigid diaphragms represent a plane of very high rigidity and distribute load to elements which connect to them solely […]

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Posted in Education | Comments Off on Understanding Wall Panel Forces with Rigid Diaphragms

October 11, 2018

With the recent release of RISA-3D v17.0.0 the program now offer the user the option to use Chord Straps between floors of a wood shear wall building in lieu of using hold downs. Chord Straps are a great option for transferring tension load between floors of a multi-floor building and can be installed without accessing […]

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Posted in Technical Solutions, What's New | Comments Off on Hold Downs or Straps? You choose.

March 22, 2018

In RISA-3D we now have the ability to design concrete shear walls for seismic forces. There are 3 main aspects to concrete shear wall design. We will explain them here. Pier Design: ACI 318-14 Section 18.10.8 defines the wall pier design parameters. Coupling Beam Design: ACI 318-14 Section 18.10.7 defines the coupling beam design parameters. […]

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Posted in Technical Solutions, What's New | Comments Off on Concrete Wall Design for Seismic Forces Now Available