Basic Steel Frame Structure
Center Column Joint at Top


A simple, four bay office building is being considered for additional equipment
storage facility at the construction company where you work. The company would
like to use the steel Ibeams currently in storage at the company for
the center columns. The list of available Ibeams are given in the table at the left.
What is known:
 Young's modulus, E, is 200 GPa.
 Dead load on the roof is 300 kg/m^{2}.
 Live load on the roof is 250 kg/m^{2}.
 A factor of safety of 2.5 is required for all loads.
 Columns are rigidly fixed to the ground.
 Columns are assumed to be fixed at the top due to the rigid beams.
 Yield stress in compression is 250 MPa.
