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QUESTION 1 Given in the table below is a sample of design information for the compressive resistance of a particular steel column for different effective lengths. The graph is of this data is also shown. 800 700 600 . 500 Effective Compressive Length Resistance (mm) (kN) 2400 680 2800 602 3200 529 3600 462 4000 404 4400 353 4800 310 5200 273 5600 242 6000 215 6400 192 Compressive Resistance (kN) 400 300 200 100 0 1000 2000 6000 7000 3000 4000 5000 Effective Length (mm) Using the tabulated data in the example given on the previous page, find the following. a) The compressive resistance of the column if the length is 4000 mm: KN b) The length of a column that would have a compressive resistance of 273 kN: mm c) Estimate the compressive resistance of the column if the length is 3500 mm: KN