Read the model open in ETABS straight into the calculators.
A small, free Windows program. Run it beside ETABS and the calculators with a live from ETABS option read the open model directly — joints and their reactions, columns, piers and their forces, the grid, and ETABS's design results — with no tables to export and paste.
It runs on your own computer and answers only there (on http://localhost:5051). The model goes from the bridge to the calculator in your browser; nothing is sent to our server unless you save a calculation.
It only reads, but for one thing: from version 1.9.0 the torsional irregularity check can write the amplified accidental eccentricity back into your seismic load patterns. The bridge window then shows what it will write and which page asks, and writes nothing unless you click Yes.
Two ways to run the same bridge. Start with the program; if it says “Couldn't attach to ETABS”, use the plugin.
Runs beside ETABS, nothing to install in ETABS. Needs ETABS's API registered on the PC, as it usually is.
EtabsWebBridge.zip: The program with a short read-me, zipped · 202 KBSHA-256 0a30575078088922d20269edcd41ef470871b9d8444671686afd4192d854c3b3
EtabsWebBridge.exe: The program alone · 421 KBSHA-256 ef1682bb3a94ec8495a499efad2d23d696db3373e577cc5202f88befc9ab094a
The same bridge running inside ETABS: no registration, no administrator rights. Use it if the program can't attach.
The ETABS plugin (EtabsWebBridge.dll) with its read-me, zipped · 89 KBSHA-256 15fcb6dc288350fd5ba729cc5e371efcaa647b4f80f9cde2a33d4687c9f6ef8b
Once
Documents\EtabsWebBridge.Each time
Version 1.10.0, built 2 November 2026 against ETABS's API (CSiAPIv1 2.12.0's published signatures; the calls of 1.2.0 also against 2.10.0.0). The first line in its window says which version is running.
Read the whole model once and keep it: Saved ETABS models saves its joints and reactions, columns, walls, grid, design results and story tables in your browser and as a file — from version 1.10.0 every column's, pier's and beam's too, each in one read. While one is in use, every calculator's live from ETABS reads it, with ETABS closed.
The bridge carries no copy of ETABS's API: when it starts it finds the running ETABS and loads that version's own CSiAPIv1.dll from its program folder, so it talks to your ETABS in its own terms. It then checks itself against it and lists in its window any call your version doesn't have — the parts of the calculators that use those calls say so, and everything else works.
It needs an ETABS that comes with CSiAPIv1.dll (recent versions do). If yours doesn't, the bridge says so when it starts. Where that API can't reach the running ETABS (as on some ETABS 22 computers), the bridge calls ETABS by name instead, as an Excel macro or a Python script does, and says so in its window. If it still says “Couldn't attach to ETABS”, ETABS's API isn't registered on that PC: use the plugin. It was built and checked against CSiAPIv1 2.12.0's published signatures; the calls of 1.2.0 also against 2.10.0.0; the calls that differ most between versions (design results, stories, section shapes) are read in a way that costs only that value, with a note, if a version names them differently.