[Steeveedee]

I'd check into the longevity that you can expect with red oak. I think that white oak would be a better choice, personally. The General used southern yellow pine (SYP). The important criterion for wood exposed to the weather is porosity. Pores in the end grain are like soda straws and can wick moisture way up inside the wood, leading to mold and deterioration. White oak and SYP are pretty much sealed up on the ends, so will live longer.