| Owner: | Martin Marietta Materials Incorporated |
| Type: | Open Hopper |
| AAR Class: | GB: Open top car, having fixed sides, fixed or drop ends and solid bottom. |
| AAR Type: | G119 |
| Detail Info: | Unequipped Gondola, Inside length less than 48ft, Steel Floor, solid ends, Inside height: 60-167 inches, Load Limit: 205,000 and greater |
| Plate: | B |
| Max Gross Weight: | 286000 |
| Load Limit: | 235300 |
| Dry Capacity: | 2480 |
| Ext L/W/H: | 42' 0" / 10' 8" / 11' 1" |
| Int L/W/H: | 37' 2" / 7' 5" / 7' 4" |
