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[–] cptmonk 0 points 1 point (+1|-0) ago 

Use to work on the railways in Australia. We would mainly do this on the older tracks in remote areas. Where tracks were normally sectioned. they were joined by plates every 30 feet or so. (Can't remember the exact length) . Welding them together made a longer single track which lead to a smoother, safer ride fo the trains, not to mention required less maintenance.. This shit burns so hot it was amazing,. If a thermite bag was a bit light, we would put in railway dogs/spikes, anchor points, etc to have enough material to complete the job. They would melt in seconds. You have to be careful of not getting caught in the cloud of fumes if the wind change as it would burn your lungs. The two welders on our crew both died of lung cancer at quiet a young age.