Interstorey Drifts (NTC-18)

According to section 7.3.6.1 of NTC-18, for the cases of the limit states of operational level (SLO) and damage limitation (SLD) the damage caused from the seismic action should be limited to non-structural elements and should be assured that no structural damage will be caused that would make the structure temporarily unusable.

This target is achieved when the values of interstorey drift are below the limits indicated in the following table: