IPC Subgroup
E21D 11/38 Waterproofing; Heat insulating; Soundproofing; Electric insulating
Introduced: July 1974
Last revised: January 2006
Full Title
Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings , e.g. by assembling > Waterproofing; Heat insulating; Soundproofing; Electric insulating
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS