1888 Lockwood's Dict. Mech. Engin. 89Core Irons, or Core Rods, rods of wrought iron from 1/ 8 inch or 1/ 4 to 1/ 2 inch in diameter, according to the size of core.
1960 R. ListerDecorative Cast Ironwork 225Core Irons, bars of iron built into cores to reinforce them.