Hi Kazdel
A platelayer laid and maintained railway tracks, my grandfather and his father were platelayers living in lincolnshre. They laid the tracks and then afterwards there would be gangs of workers who would walk the tracks looking for faulty rails and sleepers, then these would be replaced with new rails or sleepers.A lot of this work was done while the trains were still running, and had to be done after one train had gone bu and before the next one came along. Now adays they close the whole track of and repair or replace faulty track,
ricky