IS 4880 : Part 6 : 1971 Code of practice for design of tunnels conveying water: Part 6 Tunnel support
| UDC 624.191.1 : 624.196 : 624.023.9 | WRD 14 |
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| Reaffirmed 2020 |
1. Scope
1.1 This standard ( Part VI) covers the criteria for design of steel supports and roof bolts for tunnels and shafts in rock and soft strata.
NOTE- This standard should be used in conjunction with IS: 5878 (Part IV)-1971,