Interaction program calculates the Moment - Axial force interaction for hinged columns, different profiles and material properties can be selected. This program give the numerical values, it can plot a schematic diagram of interaction curves in a display monitor. Chen 1971 or Nether cot 1989 capacity curves can be selected.
Note: because the Progress bar version may need an .OCX file installed on your computer then there are two versions, with and without progress bar.
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