Standard-sized wood boards used to frame walls, floors, and roofs in construction.
Dimensional lumber is standardized, kiln-dried softwood lumber cut to specific nominal dimensions such as 2x4, 2x6, and 2x8, used extensively in wood-frame construction for walls, floors, and roofs. The actual dimensions are slightly smaller than the nominal dimensions due to drying and surfacing. Dimensional lumber is graded for strength and appearance.
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