Definitions for "DIMENSION LUMBER"
Framing lumber that is nominal thickness.
Standard commodity lumber ranging from 1 x 3's to 2 x 12's, in varying lengths.
Refers to the standard sizes for framing lumber. joists for example are about 2 inches thick by 8, 10, or 12 inches wide, depending on where they're used. Wall studs are usually either 2X4 or 2X6 inches.