September 15, 2020
CD Factor for Wood Hold-Downs
If you have utilized Hold-Down's in RISA-3D, you have mostly likely noticed that a value of CD is reported for each selection in the database. However, it may not be clear how it is being used?
September 10, 2020
Understanding Node Reactions for Wall Panels
In the Node Reaction spreadsheet, all reactions from node-based boundary conditions are reported. If you look closely at some models, there may be wall panel labels in the Node Reactions spreadsheet as well. This may cause users to ask the question:”what are these reaction values for a...
September 3, 2020
Precompression in Two-Way Post-Tensioned Slabs
Introduction In the design of two-way post-tensioned slabs, whether it be by use of unbonded or bonded tendons, precompression or “average minimum precompression,” is a critical serviceability requirement in ACI318. It is used to serve as a means for selecting a prestressing force and/or quantity...
August 27, 2020
VIDEO: Creating Custom Shapes in RISA-3D
Learn how to build custom steel and concrete shapes using RISASection and then import them into RISA-3D to incorporate them in analysis and design.
August 19, 2020
Tips & Tricks for Modeling in ADAPT-Builder
Modeling complex structures in any structural analysis and design software can be cumbersome. ADAPT-Builder provides users with straightforward modeling operations and functionality within an easy to navigate user interface which allows for efficient model creation. The resources below outline the...
August 19, 2020
Steel Joist Design now Available in RISACalc
Open web steel joist design is now available in RISACalc per the SJI 43rd/44th and 42nd Editions! The available joist series include K-Series, LH-Series, DLH-Series, SLH-Series (42nd Edition only), and KCS joists.
August 18, 2020
Determining Masonry Wall Compression Block Depth Value "a"
When determining the Depth of Compression Block value of ‘a’ in a Masonry Wall design based on the equation a = (As * fy)/(0.8 * fm * b) in a RISA-3D model, it is possible to see a small variance in the program results versus a traditional hand calculation using this typical equation. The reason...
August 12, 2020
WEBINAR: Basics of Dynamics Analysis in RISA-3D
Modeling and analyzing structures for dynamic conditions is essential to understanding how a structure will react to loading such as wind and seismic. These analysis types can include simple free vibration analysis as well as more advanced response spectra and time history analysis. RISA-3D is...
August 10, 2020
Video: Mat Slab Design in RISAFoundation
In this video, we’ll take a look at the modeling and analysis of a mat slab in RISAFoundation. We’ll specify design parameters and soil properties to be able to obtain reinforcement design and view soil pressure contour diagrams.