Pakistan [
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The total design base shear need not exceed the following:-------------- (a)
The total design base shear shall not be less than the following:-------------- (b)
In addition, for Seismic Zone 4, the total base shear shall also not be less than the following:-------------- (c)
where-------------- (d)
Cv = seismic coefficient, as set forth in Table1.
I = importance factor given in Table2.
R = numerical coefficient representative of the inherent over strength and global ductility capacity of lateral force-resisting systems, as set forth in Table3 or Table4.
W = the total seismic dead load defined in Table5.
Ca = seismic coefficient, as set forth in Table6.
Z = seismic zone factor as given in Table7.
Nv = near-source factor as given in Table1-2.
T = elastic fundamental period of vibration, in seconds, of the structure in the direction under consideration.