| Civil Construction - 3 Years |
| Commerical Construction - 1 Years |
| Concrete Construction - 7 Years |
| Demolition - 1 Years |
| Electrical Construction - 30 Years |
| Petrochemical/Oil Refinery Construction - 30 Years |
| Petrochemical/Oil Refinery Maintenance - 2 Years |
| Pipeline Construction - 5 Years |
| Steel Erection - 1 Years |