V = horizontal seismic base sher

Z : seismic zone factor from Table 1 and Fig. 1
K : structural factor from Table 2
C : dynamic factor (see Fig. 2)

T : fundamental natural period of the structure

h_N : structure height above the base in meters
D : dimension of the structure in the plane of vibration under
       consideration in meters

S : site-structure resonance coefficient from Table 3
I : building importance factor from Table 4
W : total dead load of the building