Storage racks are the most commonly preferred type of structure in warehouses. These structures are assembled from cold-formed steel sections and are subjected to massive gravity loads of pallets. The behaviour and hence the design of these structures is quite complex due to the presence of perforations in the uprights, their sensitivity to buckling, and the semi-rigid nature of the connections. Additionally, there is a wide variety in the cross- sections of uprights used in the industry by various manufacturers. Because of these reasons, standardized design guidelines cannot be formulated and the design has to be assisted by testing of components and systems in the laboratory. The present work is aimed towards experimental and numerical studies on the storage rack system. The first part of this research work covers the testing of components of the storage rack, namely stub columns, upright frames and beam-to-upright connections and numerical studies on the connection. The moment-rotation relation has been experimentally studied by cantilever tests on the connections per EN15512. From the experimental results, a Ramberg-Osgood type model has been developed to represent the moment-rotation relation of the connections. The second part of this work is aimed at studying the natural period of the storage racks with and without spine bracings. The natural period of one bay two storey storage racks has been obtained through sweep sine tests using the shake table. The rack is also subjected to base excitation to study the performance of racks under the seismic conditions. The rack has also been in Mastan2, an advanced analysis package, to numerically obtain the natural period and peak displacements subjected to base excitation.