Railway Clips in Railway Fastening SystemRailway clips are made of spring steel and must be pressed into position by machinery or an accurate blow with a sledgehammer. A tracklayer can also use hand tools to install them.
There are several types of elastic fasteners. Some have failed and some have succeeded. Rail is in the category of true success. Rail fasteners have been around since 1950 in Europe and came to the U.S. in about the 1970s. I remember when we first started using these and had to trade in our spiking maul for a sledgehammer. Until we got the hang of it, we experienced a lot of bruises on our ankles and shinbones. Rail has several types of elastic fasteners (clips). They can be engaged in line with the rail with the “e-clip” or perpendicular with the “fast-clip.” Both serve very well in attaching the rail to the base plate and most importantly controlling those longitudinal forces. Each railway clips could hold about 2,500 pounds of force. That is good for about a 2 degree temperature change in the larger rails when two clips are used. Temperature fluctuations generate about 2,200 pounds of force for each degree of change, depending on the rail size.
Railway clips make it easy to install new rail or thermally adjust the rail to a neutral temperature, ensuring that the track does not buckle. The invention of the elastic fastener has revolutionized rail fastening systems with respect to continuous welded rail. Without these types of fasteners there would be more derailments and potential loss of life with each one. Since Rail is good at what it does, many “copycats” have entered the field, and engineers must use caution when buying elastic fasteners from foreign or domestic sources.
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