Railroad rails are different weghits. The heavier rail is used primarily on moder main line trackage, with lighter rail in spurs, sidings, yards, etc.
Most main line rail is 139 pound rail. This means three feet of it weighs 139 lbs. Divide by three and you will find that a 12" section weighs 45.33 lbs. The same applies to 80 pound rail. 90 pound rail, etc.
So, you must know the rails "weight", as it was manufactured.
Most rail used in heavy curveature is carbon steel, and requires an oxy-acetelene torch or diamond saw to cut the stuff. It is very expensive and very tough stuff.
If you have a piece of rail long enough, its weight, manufacturer and date of manufacture on the "web" of the rain, which is the thinner part of the rail under the rail's head, you can determine the rail's weight. If you have a 12" section already, you will not see all of the information on it, as it takes much longer length to reveal this info. It's not in small print.
In addition, after the manufacturing date of the year produced, you will see "hash" marks, which is a number of verticle marks, numbering from one mark up to twelve marks. These marks indicate the month of the year in which the rail was made.
If you go looking for something similar, be very aware of your surroundings and watch out for any rail traffic. Any time you are aroung railroad cars or engines, you can expect it to move at any time, on any track, in either direction without warning. BE SAFE.


