HackerTube / Video
Why Railroads Don't Need Expansion Joints
Practical Engineering
Practical Engineering explains how continuous welded rail copes with thermal expansion by restraining it, using the relationship between temperature, stress and strain. The video is part of a series on railways.
Linked in rail and heat-related threads as the clear explanation of why railroads need no expansion joints and how heat problems are handled.
4 Hacker News mentions · 2024–2026