Code 7855 applies to employers engaged in the laying of rock, ballast on the grade, the laying of ties, and the laying of track.  This classification applies to such operations on new roads, and also to the re-laying of track or ties for old roads.  There is no classification distinction for work on main lines, side tracks, or spurs to industrial properties.  Includes such work as the installation of crossover frogs and switches, the erection of switch stands and switch mechanism, erection of cattle guards, the placing of grade crossing planking, and similar operations directly incidental to the laying or relaying of tracks. 

This classification is also applicable to the maintenance of the right-of-way or tracks and contemplates such operations as the placing of additional ballast on the right-of-way and the replacing of worn ties and rails.  It covers the type of work which is normally undertaken by a section crew of a railroad in those cases where the railroad prefers to have contractors perform its maintenance work rather than to employ direct labor.  Some types of maintenance extend to such operations as the cutting of weeds from the right-of-way, the repairing of fences along the right-of-way, the digging of small drainage ditches, and the filling in of small washouts caused by heavy rains.  This classification is also applicable to the removal of railroad ties.