Download transparent Bed PNG for free on PNGkey.com. All Bed images with no background can be in persnal use and non-commercial use. , Page 6 Nordic Copper is the product range for architectural solutions and applications, like. facades and roofs. The unrivaled patented range of factory-applied surface treatments provides copper with various stages of oxidation and patination immediately. The thickness of sheet and strip copper is measured by its weight in ounces per square foot. For example, the thickness of 12 ounce copper is such that every square foot weighs 12 ounces. The thicknesses commonly used in construction are between 8 and 32 ounces.