The fully adjustable long-span multi tier shelving system is designed for storage of light to medium heavy loads. It lends itself to use in almost any situation: shelving racking, long span shelving, multi tier and high rise installations. The system offers the benefits of quick assembly, good stability and low cost. Multi tier rack is dedicated for the storage of hand loaded heavy products, such as machinery equipment and tools. The system is also suitable for the construction of multitier constructions.