Analyze by choosing the "semi-rigid diaphragm" modeling.

The Complete Message:

Analyze by selecting the "Semi-rigid diaphragm" modeling method in the analysis settings.


Solution:

Using the Analysis Settings / TBDY 2018 Analysis Settings Wizard , select the appropriate structural system, slab type and then select the semi-rigid diaphragm option.

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Next Topic

Select "Use seismic combinations for slab design".