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Why don't railroads need expansion joints?
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this post was submitted on 01 Jan 2025
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Yeah in Melbourne several years back we had a heat wave that fucked up a bunch of the train tracks.
Isn't the thunk-thunk as you're travelling the wheels of the carriage passing over the expansion joints?.
You should probably watch the video. It's informative and answers your question.
Nowadays there are no thermal expansion joints, the rails are welded. Any thunk thunk left is at switches.