Primary members are the main load carrying and support members of a pre-engineered building. The main frame members include columns, rafters and other supporting members. The shape and size of these members vary based on the application and requirements. The frame is erected by bolting the end plates of connecting sections together. All the steel sections and welded plate members are designed in accordance with the applicable sections as per the latest international codes and standards such as AISC, AISI, MBMA and IS to meet all the customer specifications.