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PCE
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DIFF Main Group
E21D 17/00

Caps for supporting mine roofs

Introduced: September 1968

Of 5 combined children, 3 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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  • E21D 17/003 CPC only CPC only
  • E21D 17/006 CPC only CPC only
  • E21D 17/01 characterised by the shape of the cap, e.g. of specified cross-section IPC+CPC Available in IPC and CPC
  • E21D 17/10 Details of mine caps for engaging the tops of pit-props, with or without retaining-plates; Retaining-plates IPC+CPC Available in IPC and CPC