Use a text editor to view the Table of Corrugated Fiberboards in file ECT.BSE and edit the data to appear like the left hand side shown below. The

input data are abbreviated compared to the data in Example 2.1. Material codes are not specified. The result of not specifying material codes is that the default linerboard and the default corrugating medium will be assigned. Execute program ECT. The dimensionless buckling stress of each microplate element (figure 3) of the short column structure is compared with the values from the calibration data base. In this example board code 150A has yielded a too flexible component, outside the calibration range, and the output for C.D. short column strength is, thus, surrounded by braces, i.e. { }.

Nominal 150 lbf/in² and 200 lbf/in² CD short columns are shown to fail by local buckling in the single face components; the basis weight values of the single face components are surrounded by brackets, i.e., [ ]. However, failure switches to corrugating medium in the 275 lbf/in² short columns.

Observe the ordering of short column strength from B- to C- to A-flute construction. When failure initiates in the facing components strength decreases from B- to C- to A-flute, opposite of the trend for fiber consumption. The largest A-flute structure is most prone to local buckling. The ordering of strength is shown to be less significant when failure initiates in the corrugating medium. Compare the ordering of strength observed here with the order for boxes in Example 1.1