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A one-bay one-storey steel planar frame is constructed from rolled I-profile elements consisting of universal columns and a universal beam. The buckling strengths of the columns and beam according to Eurocode 3 (2002) constitute the design constraints. The beam and column profiles are optimised to minimise the structural mass subject to the design constraints for both a flush-end-plate bolted (semi-rigid) structure and a welded (rigid) structure. For the specific numerical case considered the structure is subject to a horizontal force and a uniformly distributed vertical load. Comparing the costs of these optimal solutions shows that the bolted frame is 7% or 14% cheaper than the welded frame on the base of British and South African cost data respectively.

Optimum Design and Cost Calculation of a Simple Frame with Welded or Bolted Corner Joints