| Includes | maintenance, repair, rehabilitation, replacement, restoration, preservation, etc. of metals. |
| Level 4 Numbering Recommendation | one Level 4 title for metals is provided as an example for user's creation of more detailed titles for other subjects as required. following Level 4 numbering is recommended: .51-.59 for maintenance. .61-.69 for repair. .71-.79 for rehabilitation. .81-.89 for replacement. .91-.99 for restoration. |
| See | 02 25 23 for existing metals assessment. |