Primary Member Structures



Primary Frames are the main load-carrying structural steel components. The stability of the building is important for protection. Structural frame members are separated into two different categories, primary and secondary members. Main framing structure is made up of three rigid rolled plates of equal or varying thicknesses welded together to form an I-Section. This frame comprises of tapered columns and tapered rafters. The columns and the rafters may be either uniform depth or tapered.

Columns: The main purpose of the columns is to transfer the vertical loads to the foundations. Columns are made up of I sections which are most economical than others.

Rafter: A rafter is one of a series of sloped structural members (beams) that extend from the ridge or up-to the wall-plate, and that are designed to support the roof deck and its associated loads.

In pre-engineered building concept, the complete designing is done at the factory and the building components are brought to the site and erected directly. These components are made in modular or completely knocked condition for transportation. These materials are transported to the customer site and are erected. Welding and cutting process are not performed at the customer site. No manufacturing process takes place at the customer site.