What do the different grades and types of lumber mean ... Also, the methods in which the lumber is handled, treated and finished have a huge impact on which type is best for various applications ...
The wood is structurally stable and available in grades from select which means no knots or blemishes to knotty. You seldom need expensive select boards for decking. Lumber expert Josh Kou ...
The main concern with treated wood is the chemicals used to preserve it. For many years, chromated copper arsenate (CCA) was the standard treatment for wood, especially in outdoor settings.
Most fall somewhere in between. The success of treatment can vary with the condition. Autism is often treated with behavioral therapies. The most widely used is called Applied Behavioral Analysis ...