Importance Coefficient for Seismic Design Ci
Values of importance coefficient for seismic design Ci (Tbl. 1.0.4 from JTJ 004-89):
| The importance of the motorway | Important coefficient for seismic design Ci | 
| Important Highway and A class motorway | 1.7 | 
| Highway and A class motorway or important B class motorway | 1.3 | 
| B class motorway or important C class motorway | 1.0 | 
| C class motorway or important D class motorway | 0.6 | 
Values of importance coefficient for seismic design Ci (Tbl. 1.0.4 from JTG TB02-01-2008):
| Importance of the bridge | E1 seismic effect | E2 seismic effect | 
| A class | 1.0 | 1.7 | 
| B class | 0.43 (0.5) | 1.3 (1.7) | 
| C class | 0.34 | 1.0 | 
| D class | 0.23 | - |