October 25, 2018
ASCE 7-16 Is Now Available!
The 2016 edition of ASCE Minimum Design Loads and Associated Criteria for Buildings and Other Structures (ASCE 7-16) is now available in RISA-3D v17.0, RISAFloor v13.0, and RISAFoundation v11.0!
October 19, 2018
Eurocode C1 Factor for Lateral Torsional Buckling
Eurocode lateral torsional buckling capacity is calculated per equations in Annex F in the ENV 1993-1-1:1992. This calculation uses variables C1, C2 and C3. Since there is no generic formula in the Eurocode to calculate the moment gradient factor, C1, RISA will use the widely accepted López, Yong...
October 18, 2018
Updates to Wood Wall Aspect Ratio Limits in RISA-3D
With the initial implementation of wood wall design in RISA-3D, the wall aspect ratio was calculated as the full height of the wall divided by the width of the region.This was intended to accommodate balloon framed multi-story walls that were drawn as one continuous wall stack. With recent...
October 11, 2018
Wood Wall Panels - Straps vs Hold-Downs
With the recent release of RISA-3D v17 the program now offers 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...
October 8, 2018
RISA Completes Office Renovation
RISA recently completed renovations to their Foothill Ranch, CA office. The renovations include a new kitchen and coffee bar, new conference rooms and updated open office concept that allows various departments to easily work collaboratively together.
October 4, 2018
Drawing Grid and Other Modeling Improvements
RISAFloor v13 includes a variety of modeling features which allows users to quickly create and manipulate geometry. These features include construction lines, saved selections and copy elements from floor to floor. Overall, these features can be used to help engineers streamline their modeling...
October 4, 2018
Partial Fixity End Releases in RISA-3D
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...
October 2, 2018
Wood Design per AWC NDS 2018 Wood Code
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 Model Settings.
September 28, 2018
Analysis Offsets now Available
RISA-3D v15 includes "analysis offsets" which moves the centroid of the member for analysis allowing for flexibility in how members are designed. Let's use a WT brace to demonstrate how this feature can be utilized. When you model a WT brace it exists at the member centroid, which means that no...