
Factory Building and Entrances: Construction of a steel-frame factory, based on a project plan, begins with excavating and leveling the foundation. Flanges are placed on the foundation to support the steel columns according to their locations in the project. Factory construction continues with the erection of the steel columns. A system commonly known as an A-frame is applied to the steel structure, and the steel factory roof is placed and assembled on-site using a crane. Other roof systems are also available.