Pressure-treated wood has a very specific pattern and color. It's usually substantially greener or browner depending on the treatment. And there will be small c

Pressure-treated wood has a very specific pattern and color. It's usually substantially greener or browner depending on the treatment. And there will be small cuts on the surface of the wood in a regular checker pattern. The pressure treatment just injects the preservative deeper into the wood. It's different from glue-lams or engineered joists, which are just regular old wood that's been glued together.