Avoirdupois is a measure of weight customarily used for agricultural products and nonprecious metals. An avoirdupois ounce is lighter than a troy ounce; there are 16 ounces in an avoirdupois pound.
A Gross Ton (GT) is a unit of weight commonly used in the United Kingdom and United States for measuring heavy masses, equivalent to 2,240 pounds in the Avoirdupois system, traditionally employed in shipping and heavy industries.
