P. To open the Earthquake workflow

You must perform an analysis on a model with a load cases including an EC8 response spectrum load.

Perform a successful analysis.
Select Earthquake in the Workflows panel.

The EC8 Stiffness page opens along with the Floors dialog, Storey Stiffness table, and Soft Storeys table.

Tip: You can nominally use the pages in the Earthquake workflow in any order. However, it is recommended that you work through the checks in a left-to-right order (i.e., EC8 Stiffness, EC8 Plans, and then EC8 Elevations).