This document outlines the analysis of complex cylindrical shell structures using both analytical and finite element methods. It will analyze simply supported single barrel, continuous, and multiple barrel cylindrical shells analytically and using SAP2000 software. The objectives are to observe structural parameters from both approaches, evaluate responses to loads, and check the precision and limitations of the finite element software. The methodology is to analyze the structures analytically, compare the results to SAP2000, increase complexity, analyze with a program code, perform finite element analysis with SAP2000, and draw conclusions.