80. The outer edge of a wheel tread may not contact the gauge side of a spring wing rail.
The toe of each wing rail must be tightly bolted. Each spring must have a tension sufficient to hold the wing rail against the point rail.
The clearance between the hold-down housing and the horn may not be more than 0.63 cm (1/4 in.).
Each frog with a bolt hole defect or head-web separation must be replaced.