The tower which is easy-to-install usually functions as a support to elevators and flow pipes. It is made of galvanized sheet. Its dimensions and heights vary depending on the project and requirement. It can be used for many years if positioned accurately and installed with good workmanship. Machinery room has the same function as the tower but is preferred for more complicated projects. It is a complex structure that can embody 2 or more elevators, optional initial cleaning unit for a high-rated crop distribution, flow pipes and distributors. Designing is important and shows structural differences according to customer needs.