I finished fabricating my pier. It’s made from a 7’ section of thin walled 6” tubing. With my tractor auger I dug a 48” deep hole 12” in dia. This will give me 3” around the tubing for concrete, which will tie to a 4” thick 2’ dia pad. The pad is for stability only.

Online I found an engineering website which computes the deflection angle of a hollow cyl, given material, wall thickness, diameter and anchored length also the force applied. Cool! On CloudyNights I found a discussion about deflection angles on piers and it’s basicly anything an arc-second or less is good and slamming the pier with a 5# hammer is a good simulator. So I gave it the dimensions of my tubing and did the math for a 5# hammer swung at arm’s length, gave a ballpark estimation on acceleration (faster than gravity) and found the deflection angle was well below the threshold.

The soil conditions bother me so I went nearly twice the recommend depth and lots of concrete. Also, I welded a car battery tray to the tubing. Mount runs off 12v DC. When the cement cures I begin building my roll-off shed.