I've always wanted to generate a parametric structural analysis model and I figured why not do it up big with one of my favorite towers, the Regis Tower in Chicago.



The form …
It's been awhile since I have posted, but I have a fun "new" tool released on the website.
You can take it for a spin here:
https://www.re-tug.com/concretedesign/
The github repo is here:
https://github.com/retug/concJS
and a how-to-use …
Before we hop into the updates, I owe (3) people a very thankful shout out for assistance on this update.
The MVTs (Most Valuable Testers)
First, Celt, who is a friend from eng-tips and fellow programmer. His website is awesome, check it out here …
Unfortunately from my research, a capacity based design module for BRBs in ETABs does not exist. See snip below.

Given this glaring missing feature, I figured I would outline how I have …
After the development of R2R, RAM Structural to Revit connection tool, I wanted to make an E2R, ETABS to Revit connection tool. Below are some screenshots of the newly developed tool.
I made a youtube video on how …
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- fpsstructures on ETABs Parametric Building
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Really impressive work combining Three.js with ETABS for a parametric workflow. The ability to quickly generate and analyze multiple tower forms can be a huge advantage during early-stage design exploration. I also like how the structural logic still feels clean and efficient despite the complex geometry. Parametric modeling paired with …
- Toni on ETABs Parametric Building
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How do you assess the fineness of the mesh required? More scale or load based?
- retug on Transfer Diaphragm Design
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@316Jq, The way I understand, the diaphragm design force (inertia force) per 12.10.1.1 is the inertia force.
Using the blog example numbers let's say this is 1392 kips.
The transfer diaphragm force could be estimated to be the delta in shears above and below the transfer level ~ (1500 - …






