Early on when we first moved to our current land, we cobbled together an open sided equipment shed to keep our things out of the rain. We used round logs that came from clearing a space for our solar panels. Since we weren't planning to use the shed more than 2 or 3 years at most, we didn't even bother to debark the logs, nor set them up in a foundation of any sort. No. The upright support posts were set directly on the ground. The tree species is ohia. We don't have oak, locust, or Osage orange here in Hawaii, but we have plenty of a hardwood called ohia.
Using old metal roofing we snagged on its way to the dump, we cobbled this shelter together for less than $100. We did buy spikes, construction connectors, plumbers tape, and nails.
So time went by. We were busy and didn't give this shed much thought. So here we sat, 15 years later. Recently we had a heavy storm dumping 7 inches of rain overnight along with gusty strong winds. 5 of the 10 upright posts snapped, succumbing to dry rot. Sitting directly in the ground, they were frequently wet and fungus spread upwards from the soil.
After salvaging most of the equipment from under the severely sagging and wonky roof, we considered what steps to take next. Tearing down the whole thing was an option. It was old. But after determining that the horizontal logs were still sound, we decided to try repair. The roof was jacked up at each post site and a new 4x4 set in place, and placed upon a concrete foundation block. The structure was saved. Afterward I checked each upright log post and found all were dry rotted. It's amazing it stood for so many years.
We opted to use store bought 4x4s. Why? They were already on the farm, thus immediately available. We did not have any seasoned logs on hand.
I wish I had a before photo to show you, but I accidently deleted it. Sigh. So you'll just have to image the sagging, wavy roof. Oh by the way, the old metal roofing is still functional. Yes, it rusty and corroded. Edges were eaten away by the vog. But it still has enough sound metal to be an effective roof for a number of years to come. Not pretty, but functional.