| A | B |
|---|
| Flat Spots - (pass. car) | Single spot 1 inch or more in lenghth or two adjoining spots that are each 3/4 or more inches in length |
| Flat Spots - ( Sub. Loco.) | Single spot 2 1/2 inches or more in length or two adjointing spots that are each 2 or more inches in length |
| Shell Out - (pass. car) | Single spot 1 inch or more in length two adjoining spots that are each 3/4 or more in length |
| Shell Out - (Sub. Loco) | Single spot 2 1/2 inches or more in length or two adjointing spots that are each 2 or more inches in length |
| Tread Build Up - (pass. car) | 1/8 inch or higher than tread |
| Thin Flange - (pass. car) | Worn 1- 1/16 inch in thickness or less |
| Thin Flange - (Sub. loco) | Worn 1-1/16 inch in thickness or less. (FRA 7/8) |
| Thin Rim - (pass. car) | Rims less than 1-1/16 inches |
| Thin Rim - (Sub. loco.) | Rims less than 1 inch |
| High Flange - (pass. car) | 1-7/16 inches or more from the tread to the top of the flange |
| High Flange - (Sub. Loco.) | 1-7/16 inches or more from the tread to the top of the flange. (FRA 1-1/2) |
| Groved Tread - (pass. car) | 1/8 inch or more in depth |
| Vertical Flange - (pass. car) | Flat vertical surface extending 1 inch or more from the tread |
| Rolled Rim - (pass. car) | If it extends into the rim or tread it is a defect |
| Thermal Cracks- (Loco & Car) | Any crack in flange, rim or tread |
| Flange Chip or Gouge- (Sub. Loco.) | More than 1-1/2 inches in the length and 1/2 inch in width |
| Broken Rim - (Sub. Loco.) | If the tread measured from the flange at a point 5/8 inch above the tread is less than 3-3/4 inches in width |
| Hollow Tread - (Sub. Loco.) | Worn hollow 5/16 inch or more |
