| E | SK | SECTION E — FIXED CONSTRUCTIONS |
| E01 | USK | BUILDING |
| E01 | KL | CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES (of tunnels E21D) |
| E02 | KL | HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING |
| E03 | KL | WATER SUPPLY; SEWERAGE |
| E04 | KL | BUILDING (layered materials, layered products in general B32B) |
| E05 | KL | LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES |
| E06 | KL | DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS, IN GENERAL; LADDERS |
| E21 | USK | EARTH OR ROCK DRILLING; MINING |
| E21 | KL | EARTH OR ROCK DRILLING; MINING |
| E99 | KL | SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01] |