finding 11/32 pushrods
And bending stiffness if a function of the fourth power of OD and ID, not a squared power. The area will aid with compression stiffness, but this is likely not an issue since the weakest link is bending.
It's really cool you knew about the fourth power vs the second power. We've seen that even on concrete. The code calculations all use the square root of the compression strength, but empirically, we've seen it correlates better to fourth power. Although, good luck changing the codes, right?
