Lumber is a term used to refer to wood that has been cut into boards or other shapes for use in construction and other building projects. It is one of the most common materials used in building, and is often used for framing, flooring, and other structural components. LUMBER is typically made from softwood trees such as pine, fir, and spruce, but can also be made from hardwoods such as oak and maple. It is an essential material for any building project, and is often used in combination with other materials such as concrete and steel.