+A **2b4** (two-by-four) is a common nominal dimension for [Lumber](/wiki/Lumber) used extensively in [Construction](/wiki/Construction). Typically made from softwood, it forms a foundational component for wall framing, floor joists, and other structural elements.
+## See also
+- [Wood](/wiki/Wood)
+- [Framing](/wiki/Framing)
+- [Building Material](/wiki/Building_Material)