bouriquet on Nostr: Railway can range in temperature from below freezing to over 100 degrees F or 40 C. ...

Railway can range in temperature from below freezing to over 100 degrees F or 40 C. That means every mile of steel rail wants to be more than 2 feet longer on the hot days than the cold ones. Part of the secret is to install the rails when it’s hot. Welded rails today don’t have the frequent joints that allow expansion and contraction.