I cut wood shavings off of a joist, and a foundation board. I performed a three tests on each batch of shavings to determine if they are treated.
1. I tested to see the color underneath the shaved sections. If the raw wood is yellow/white in color, it is supposed to be non-treated.
2. I went to my backyard and lit each shaving on fire. If chromated copper arsenate is in each piece, it should have a green flame. It did not for either set of shavings.
3. Finally, I soaked a bit of each of the shavings in test tubes, then used pH paper to test. If the wood is treated, it should make the water alkaline. It did not, both tests had a neutral pH of around 7.0.
So, I apologize, I do NOT think my wood is treated now. The wood is from 1977, the printing on the wood is "Weyehaeuser 4- Square Lumber Kiln-Dried"
Should they have used treated wood for the basement ceiling/first floor joists? What about the foundation boards at the edge. The foundation boards are against cement, but it appears there is a thing layer of insulation separating the board from the cement...something called a "sill plate"?
What should I do now? It seems as if I can just install galvanized whatever into the joists, but I am worried because the 1977 carpenters didn't install treated wood.