V_e: Equivalent lateral force at the base of the structure  representing elastic response

R: Force modification factor that reflects the capacity of a structure to dissipate energy through inelastic behavior
(See Table 1)

U: Factor representing level of protection based on experience (0.6)

v: Zonal velocity ratio = the specified zonal horizontal ground velocity expressed as a ratio to 1 m/s

S: Seismic response factor, for unit value of zonal velocity ratio (See Table 2, Fig. 1)

I: Seismic importance factor of the structure

Seismic importance factor:
 The seismic importance factor I shall equal 1.5 for post-disaster buildings, 1.3 for schools and 1.0 for all other buildings.

F: Foundation factor (See Table 3)

W: Dead load plus 25% of the design snow load plus 60% of the storage load and the full contents of any tanks