Input can be further abbreviated when the normalized basis weight of a material is desired. Edit file ECT.BSE to look like the data below. Two

single wall boards and one triple wall board are specified. Triple wall specifications follow the same ordering of input as double wall, but on three lines.

Material High is specified for board code 275-C1. The basis weight specification is left blank because it is desired to use the normalized weight of the material, known to be 42.1 lbm/1000 ft², as it might exist in inventory. For board code 275-C2 the basis weight of the single face linerboard is added to see what benefits there might be to purchasing material High at a higher basis weight.

The triple wall example demonstrates another combination of abbreviated input. Material Arch is a high strength corrugating medium available in a variety of basis weights. Material Arch90 has the properties of Arch when tested at 73^o and 90% RH. Board 900TW is for long term storage where moisture is apt to penetrate the interior corrugated fiberboard components and a hypothetical moisture condition in the board is therefore analyzed. When program ECT is executed it will be shown that the abbreviated input get displayed with the output.

The ECT examples have utilized the data bases of stress-strain properties stored in transparent files PAPERC.PRN and PAPERM.PRN. Output from program ECT generates stress-strain input to program RSC. Flute profiles are read from file FLUTE.BSE. The A-, B-, and C-flute profiles used here are default geometries. Before examining how to specify other flute profiles the next step is to examine how program PPR is used to create the data bases of material stress-strain properties.