| Relationships | Role | Relationship Start | Relationship End |
| Calcitherm Nederland N.V. | Parent | 12/31/1984 | 12/30/1986 |
| Dixie Line And Stone Company | Subsidary | 12/31/1980 | 12/30/1986 |
| Southern Material Company | Subsidary | 12/31/1980 | 12/30/1986 |
| Amcar Texas, Inc. | Subsidary | 12/31/1980 | 12/30/1986 |
| Tank Products, Inc. | Subsidary | 12/31/1980 | 12/30/1986 |