Steel is gaining in popularity across the nation as the building material of choice because of the many options that it offers. The primary advantages of steel are its strength and its affordability. Pre-fabricated steel storage buildings are becoming the structure of choice for storage facility owners and investors alike. Steel storage buildings are seen in one-car garages to jumbo jet airplane hangars. The most popular use, in the 21st Century, for steel storage structures is seen in self-storage units. These units are popular because they are secure, provide ample space, are made of a very strong material, and have virtually no maintenance.