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Why are the bolts that hold steel rails together in oval holes?
Wiki User
∙ 14y ago
It has to do with the design of the bolts. The reason that head of the bolt is oval in shape. The head of a bolt fit flush into the bar and set in opposing sets is so that a piece of dragging equipment will not shear off all the bolts in a joint but rather the just the nuts one side. As a result if the hole is not oval on one side there would be no way to tighten or loose the bolts in a joint.
Second Answer: They would be oval shapes so when contraction or expansion happens they wont snap.
Wiki User
∙ 14y ago
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Steel wool... Or maybe just steel with many holes in it...
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The steel wheels run along the steel rails. The Rails themselves used to be bolted together with plates, and each section of rail was 39 feet long. Modern welded rail still occasionally has bolted joints, but pieces of rail can now be more than a mile in length. The clickity-clack sound occurs when the steel wheel rolls across the small gap between each section of rail at the joint that's bolted together.
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