Rates, Norms & Durations
Chemical Excavation Methods
In the Open Standard
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Open the norms tables →Rock Tunnels
| Task / Description | Slow | Ave | Fast | Units |
| Excavation, non explosive chemical method, cycle time | 8.0 | 6.0 | 5.5 | mins |
| Excavation, non explosive chemical method, Class I Granite | 0.3 | 0.9 | 1.2 | m3/cycle |
| Excavation, non explosive chemical method, Class II Granite | 2.0 | 2.6 | 2.9 | m3/cycle |
| Excavation, non explosive chemical method, Class III Granite | 1.2 | 1.4 | 1.8 | m3/cycle |
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