Depreciation of assets is determined
using the straight-line method over the estimated useful lives of such assets as follows:
| | |
Years |
| | |
|
| Buildings and other construction: | |
|
| Minor installations related to buildings | |
Between 10 and 35 |
| Administrative facilities | |
Between 20 and 51 |
| Main production structures | |
Between 20 and 56 |
| Minor production structures | |
Between 20 and 35 |
| Machinery and equipment: | |
|
| Mills and horizontal furnaces | |
Between 24 and 45 |
| Vertical furnaces, crushers and grinders | |
Between 23 and 36 |
| Electricity facilities and other minors | |
Between 10 and 35 |
| Furniture and fixtures | |
10 |
| Transportation units: | |
|
| Heavy units | |
Between 5 and 15 |
| Light units | |
Between 5 and 10 |
| Computer equipment | |
Between 3 and 10 |
| Tools | |
Between 5 and 10 |
|