| E: | FIXED CONSTRUCTIONS |
| E01: | BUILDING; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES |
| E04: | BUILDING |
| E04B: | GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001}) |
| E04B1/00: | Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs (scaffolds, shutterings E04G; structures specially adapted for buildings for special purposes, general layout of buildings, e.g. modular co-ordination, E04H) |
| E04B2001/0053: | . Buildings characterised by their shape or layout grid |
| E04B2001/0061: | . . Buildings with substantially curved horizontal cross-section, e.g. circular |
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