1 Nirjharâs interest is to know different technology and process engineering. 2  Raw iron is found in earthâs crust, as an ore. 3  Iron ore mostly found as Fe 2 O 3 (the form of iron oxide found as the mineral hematite). 4  At present, blast furnace is most commonly used furnace to produce iron.
The weight of a railroad tie depends on their size and specifications. They can range anywhere from 100 to 300 pounds.
Gauge Is thickness. The higher the gauge number the thinner the metal. The chart below shows approximate gauge thickness for metal to give a relative idea of different gauges. It is in American Standard Gauge of thickness. Standard heavy weight Sheet metal for larger craft work, roofing and range hoods etc. In copper sheet it is 1 pound per square foot approximately.