Draft

2.3LateralLoads 41

Figure2.8:Vibrationsof a Building

36 Thehorizontalforceat each level is calculatedas a portionof thebaseshearforceV

V =

ZIC

RW

W (2.8)

where:

Z: ZoneFactor: to be determinedfromFig.2.9andTable2.10.

Figure2.9:SeismicZonesof theUnitedStates,(UBC1995)

I: ImportanceFactor: which was givenby Table2.8.