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Subclass TH
| TH1-9745 | Building construction | |
| TH845-895 | Architectural engineering. Structural engineering of buildings | |
| TH900-915 | Construction equipment in building | |
| TH1000-1725 | Systems of building construction Including fireproof construction, concrete construction | |
| TH2025-3000 | Details in building design and construction Including walls, roofs | |
| TH3301-3411 | Maintenance and repair | |
| TH4021-4977 | Buildings: Construction with reference to use Including public buildings, dwellings | |
| TH5011-5701 | Construction by phase of the work (Building trades) | |
| TH6014-6081 | Environmental engineering of buildings. Sanitary engineering of buildings | |
| TH6101-6887 | Plumbing and pipefitting | |
| TH7005-7699 | Heating and ventilation. Air conditioning | |
| TH7700-7975 | Illumination. Lighting | |
| TH8001-8581 | Decoration and decorative furnishings | |
| TH9025-9745 | Protection of buildings Including protection from dampness, fire, burglary | |
