[Zeke]

I can believe the elevator and HVAC but concrete saws on wood? That likely would start a fire in an old house.

But I do know hard. We had some RR ties that were used in landscaping and they would not cut. They would ruin a chain on a CS right now. Sawzall blades got cooked. Circular saws the same. What worked to the dismay of us was a nasty old hand saw with about 4 teeth per inch.

Maybe they were mahogany, IDK.