The term "2x6" refers to a common dimensional lumber size used in construction. It indicates a piece of wood that is approximately 2 inches thick and 6 inches wide. However, the actual dimensions are typically smaller due to the milling process, often measuring about 1.5 inches by 5.5 inches. This size is popular for framing, flooring, and other structural applications. In construction, 2x6 lumber is valued for its strength and versatility. It is often used in building walls, roofs, and decks. The use of 2x6 lumber can provide better insulation compared to thinner boards, making it a preferred choice in energy-efficient building practices.