Abstract
This chapter discusses briefly the ACI code used for gravity analysis and stepwise methodology. The considered structure for this analytical study is a reinforced concrete structure, consisting 15 storys each having a height of 10 ft. The different range of gravity and thermal loads may be applied for seismic analysis. In this analytical work lateral loads considered are automated UBC, IBC 2000 and NBCC seismic and wind load. ETABS software was used to carry out the seismic analysis considering two different combinations of loads. The results obtained from the ETABS analysis were cross validated using the manual calculations for a single column with the approximate catchment area technique. The analysis yields reliable results, as the estimated load is almost 90 % of the load calculated by the software.