Ernest Christley wrote:
I can't figure this one out.

I want to add a retractable step that will stick out of the fuselage at
a 40 degree from vertical angle. It sticks out 10" and is made of 3/4"
square, .065 thick, 4130 tube. Assuming no weakness in the support,
will this support a 300lb man (me with all my luggage on my back), and
how can you tell?


I think it's the "assuming no weakness in the support" part that has
everybody tongue tied.

The square tube sees healthy enough.

It's the "rest of the story" that will make a difference.