RE: New 2mm & 4mm Coroplast Supplier!
Depends on what you're building I guess, but if you're folding up an all 2mm wing and you're getting a 2x4 piece, you'd want the flutes running the 2' direction. If you're making an RNAF wing you can get two pieces out of a 2x4' piece unless you've got a big ol' fat chord.