| f1 |
Percentage of critical damping for the 1st response spectrum (Default 5%) |
| f2 |
Optional percentage of critical damping for the 2nd response spectrum (Default is zero) |
| f3 |
Optional percentage of critical damping for the 3rd response spectrum (Default is zero) |
| f4 |
Optional percentage of critical damping for the 4th response spectrum (Default is zero) |
| f5 |
An integer corresponding to the site class as described in the following table. The default value is 4 (i.e., site class D):
| Site Class |
Value of f5 |
| A |
1 |
| B |
2 |
| C |
3 |
| D |
4 |
| E |
5 |
|
| f6 |
Spectral acceleration at short-period, Ss |
| f7 |
Spectral acceleration at one-second period, S1 |
