| Owner: | Union Pacific Railroad Company |
| Type: | Flat Car |
| AAR Class: | MWF: Flat Car. Used for transporting rails, ties or ballast and for storage of wrecking trucks, or gathering scraps along right of way. These cars are at times equipped with low sides, about 10 or 12 inches high. |
| AAR Type: | M150 |
| Detail Info: | Misc Cars |
| Plate: | B |
| Max Gross Weight: | 220000 |
| Load Limit: | 156600 |
| Ext L/W/H: | 57' 11" / 10' 7" / 5' 1" |
| Int L/W/H: | 53' 6" / 9' 4" / 0' 0" |
| User Notes: | Pile Driver Support Car |
