Merchant bar refers to carbon steel used in light commercial construction, joist manufacturing,
and industrial and commercial fabrication. This document refers to all carbon flats, hexes,
rounds, squares, and special sections that do not meet the definition of SBQ (special bar quality)
They come in flats, rounds, steel angles, squares, strips, channels – almost any form.
A merchant bar is generally used in structural applications that involves welding, bending,
punching and forming and are commonly found in floor and roof joists, walkways, and railings