The pre-engineered metal building system is a building enclosure system that always includes a structural system and often includes roof and wall cladding. The general idea of the system is represented in the diagram below. The structural system consists of rigid frames that are fabricated from plate steel and “cold formed” into an “I” shape through a manufacturing process. These rigid frames consist of roof beams and columns that are field bolted together. These frames can span large distances without intermediate supporting columns. The frames are spaced at intervals between 15’ and 60’ and can span, column-free, up to 300’ across a building.