EtabsWebBridge

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.

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. It was built and checked against CSiAPIv1 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.