| Relationships | Role | Relationship Start | Relationship End |
| Essroc Corp. | Parent | 12/31/1991 | 3/4/1998 |
| Axim Concrete Technologies Inc. | Subsidary | 12/31/1991 | 12/30/1992 |
| Relationships | Role | Relationship Start | Relationship End |
| Essroc Corp. | Parent | 12/31/1991 | 3/4/1998 |
| Axim Concrete Technologies Inc. | Subsidary | 12/31/1991 | 12/30/1992 |