|This article is about an older version of DF.|
A bar is a sub-type of building material (interchangeable with a block for that purpose), and is the base individual unit of metal, charcoal, coke, potash, ash, pearlash, and tallow soap. All metals are created as bars at a smelter, whether smelted from ores or melted down from existing metal items.
Most bars are not an end-product, but are then used to produce something else:
"Bars" of adamantine metal are referred to as "wafers", but when used as building material they function the same as any other bars.