Tips & Tricks

December 29, 2025

What’s New for IBC 2024 in RISA: A Closer Look

With RISA’s latest release of RISA-3D v23.0.1, we’re continuing to expand support for IBC 2024, helping engineers stay aligned with the latest building code requirements as adoption accelerates across the U.S.—including federally funded projects. This release builds on v23.0.0 ASCE 7-22 enhancements and adds key material design updates that move RISA further into full IBC 2024 compliance. New Material Design Updates Supporting IBC 2024 The upcoming release introduces several important design code updates referenced by IBC 2024, including: Steel Seismic design per AISC 341-22 Prequalified connections per AISC 358-22 Continued support for AISC 360-22 (16th Edition) steel design Ongoing updates to the hot-rolled shape database, including compatibility with both 15th and 16th Edition steel manuals These updates support modern seismic detailing requirements and ensure consistency with current steel industry standards. Masonry Masonry design per TMS 402-22, aligning with the latest strength and serviceability provisions adopted by IBC 2024. Key updates include: Revisions to shear design equations, including clarified definitions of shear area as outlined in Table 4.4.5, improving consistency and transparency in shear capacity calculations. Updated strength reduction factors for flexure and combined flexure + axial. Unlike previous editions that used a fixed ϕ-factor of 0.9, TMS 402-22 introduces tension-controlled,…

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New Features in RISACore v22.0 Release
February 20, 2024

New Features in RISACore v22.0 Release

New features are now available in the recent release of RISACore (RISA-3D v22.0, RISAFloor v18.0, and RISAFoundation v16.0) . We are working hard to add the features and functionality that our customers have requested as soon as they become available. With that in mind, we have prepared a new...

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New Features in RISACore v21.0.1 Release
June 8, 2023

New Features in RISACore v21.0.1 Release

New features are now available in the recent release of RISACore (RISA-3D v21.0.1, RISAFloor v17.0.1, and RISAFoundation v15.0.1) . We are working hard to add the features and functionality that our customers have requested as soon as they become available. With that in mind, we have prepared a new...

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Updated Shear Contribution for Concrete (Vc) per ACI 318-19
October 29, 2020

Updated Shear Contribution for Concrete (Vc) per ACI 318-19

The new ACI 318-19 code has been implemented into RISA-3D v19, RISAFloor v15, and RISAFoundation v13. One of the biggest changes between the ACI 318-14 code and the ACI 318-19 code is the shear contribution provided by the concrete, Vc.

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RISA Acquires ADAPT Corporation
May 13, 2020

RISA Acquires ADAPT Corporation

RISA is excited to announce the acquisition of ADAPT Corporation. Over the past 30 years, both RISA and ADAPT have focused on developing best in class solutions that directly respond to the needs of our customers and the market, while also maintaining the highest level of customer support. As a...

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Long Term Deflection in RISAFloor ES
April 26, 2018

Long Term Deflection in RISAFloor ES

RISAFloor ES has the ability to check the Long Term Deflection with Creep and Shrinkage. The program uses an iterative method to adjust the plate stiffness until it converges upon a solution. You can setup all the necessary coefficients and factors in the Model Settings (as shown below).

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2018 IBC Coming Soon!
November 8, 2017

2018 IBC Coming Soon!

The International Code Council just released the 2018 International Building Code (IBC) in August 2017.

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What is a Semi-Rigid Diaphragm?
March 10, 2015

What is a Semi-Rigid Diaphragm?

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.

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