The app takes the number of stories, ground acceleration, ground type, spectrum type and the pushover curve in units "mm - kN" as well as first mode shape and calculates the target displacement based on Eurocode 8 (2004 version), Annex B (i.e. the N2 Method). The pushover data can be copied from email or a spreadsheet. Here is an example how the data should look like for the app to work:

0 0
10 100
20 200
30 300
40 350
50 320
60 190

The first number is displacement at first step (in mm). The second number is the force at first step (in kN). The third and fourth items in the list represent the second step and so on. Data is directly formatted in the correct format if copied from a spreadsheet.

The solution is also shown graphically for a better understanding of the results.