Originally Posted by Frank Reiner:
Thank you Mr. Corky!
Ironically, the cross sectional area of the 1.25-.095 tubing is greater than that of the now required 1.375-.083.
True, the cross sectional area of the 1.25 tube is greater by 2%.
But, the section modulus (measure of strength) of the 1.375 tube is 12% greater and the moment of inertia (measure of stiffness) of the 1.375 tube is 13% greater.
Therefore, the 1.375 tube is stronger and stiffer.