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Basic Training, Episode 1 - Rail Joiners
rail joints are the bread and butter of track. one problem with these joints when you install them the rail can go over joint and the rails won’t be line up (David calls this high riding) if this happens not only will the trains derail you can have shorts and the train win’t run.
when using plastic joiners they need to be placed where you have a block or where spurs and sidings end plastic joiners should be placed on the frog side of a turnout and before structures like signals and spur bumpers.