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.
Size, symmetry and shape can vary greatly from knot to knot and all should be taken into consideration. Thick ties often necessitate the use of smaller knots like the Four-in-Hand or the Simple knot. Thin ties generally benefit from larger knots like the Pratt or Windsor. Every knot has a distinct character.