DIFF Subgroup
E21D 11/14 Lining predominantly with metal
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings , e.g. by assembling > Lining predominantly with metal
CPC:
Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling (E21D15/00 - E21D23/00 take precedence; specially for shafts E21D5/00; ; lining pressure water galleries, linings therefor E02B9/06) > Lining predominantly with metal
IPC and CPC are identically structured here. All 6 subcodes exist in both systems.
3 shared codes have differing titles between IPC and CPC.
Child Classifications
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- E21D 11/15 Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members (insulation E21D11/38) since 1974 +3 CPC IPC+CPC Available in IPC and CPC
- E21D 11/34 Joints between vertical props and horizontal top bars (end caps forming part of the props E21D15/54 ) IPC+CPC Available in IPC and CPC
- E21D 11/36 Linings or supports specially shaped for tunnels or galleries of irregular cross-section since 1974 +3 CPC IPC+CPC Available in IPC and CPC