The cross section of a column built up of two steel I-beams (S 150 ( 25.7 sections) is shown in the figure. The beams are connected by spacer bars, or lacing, to ensure that they act together as a single column. (The lacing is represented by dashed lines in the figure.)
The column is assumed to have pinned ends and may buckle in any direction. Assuming E = 200 GPa and L = 8.5 m, calculate the critical load Pcr for the column.

Transcribed Image Text:

S6 x 17.25 4 in.