Eurocode 8 Seismic zones in France
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Values of the periods and soil factor describing the shape of the horizontal response spectra | Ground type | Zones 1 to 4 | Zones 5 |
| S | TB(S) | TC(S) | TD(S) | S | TB(S) | TC(S) | TD(S) |
| A | 1,0 | 0,03 | 0,2 | 2,5 | 1,0 | 0,15 | 0,4 | 2,0 |
| B | 1,35 | 0,05 | 0,25 | 2,5 | 1,2 | 0,15 | 0,5 | 2,0 |
| C | 1,5 | 0,06 | 0,4 | 2,0 | 1,15 | 0,2 | 0,6 | 2,0 |
| D | 1,6 | 0,1 | 0,6 | 1,5 | 1,35 | 0,2 | 0,8 | 2,0 |
| E | 1,8 | 0,08 | 0,45 | 1,25 | 1,4 | 0,15 | 0,5 | 2,0 |
Values of parameters describing the shape of the vertical response spectra | Seismicity zone | avg / ag | TB(S) | TC(S) | TD(S) |
| Zones 1 to 4 | 0,8 | 0,03 | 0,20 | 2,5 |
| Zones 5 | 0,9 | 0,15 | 0,4 | 2,0 |