Abstract: Balanced cantilever construction is suited to precast segmental and cast-in-place bridges. The deck is erected segmentally on each side of the pier in a balanced sequence to minimize load unbalance and longitudinal bending in piers and foundations. The deck is self-supporting during construction, and it also supports erection equipment and construction materials stored on the cantilever. Bridges are quite different from buildings regarding their dimensions, structural systems and in general regarding their seismic response. Thus the specialized standards for their seismic design are needed. One of them is Eurocode 8/2 standard (EC8/2), which considerably improved the design practice, and comparative analysis of bridge for the same, This construction method is particularly advantageous on long spans, in marine operations, and where access beneath the deck is difficult.in this research to check balanced cantilever bridge are analysis for different spans under seismic loading by using STAAD PRO.Keywords: Balanced cantilever, STAAD PRO, Time History