A colleague and I were having a disagreement in regards to the 0 direction of a material. i have always followed the rule of the longest side of the material is 0 and all orientation is taken from that side. ie length of roll.
The material is a Biax with Fibres running at 45 to what I regard as the 0 instead of length and width like most materials.
our disagreement comes from how our plys should be orientated in relation to the drawing and the material.

what are people thoughts?