| CONSTRUCTION WORK AND CONSTRUCTIONS: LAND | SECTION 5 | | | |
| CONSTRUCTION WORK | DIVISION 51 | | | |
| Pre-erection work at construction sites | 511 | | | |
| Site investigation work | | 5111 | 51110 | 4510 |
| Demolition work | | 5112 | 51120 | 4510 |
| Site formation and clearance work | | 5113 | 51130 | 4510 |
| Excavating and earthmoving work | | 5114 | 51140 | 4510 |
| Site preparation work for mining | | 5115 | 51150 | 4510 |
| Scaffolding work | | 5116 | 51160 | 4520 |
| Construction work for buildings | 512 | | | |
| For one- and two-dwelling buildings | | 5121 | 51210 | 4520 |
| For multi-dwelling buildings | | 5122 | 51220 | 4520 |
| For warehouses and industrial buildings | | 5123 | 51230 | 4520 |
| For commercial buildings | | 5124 | 51240 | 4520 |
| For public entertainment buildings | | 5125 | 51250 | 4520 |
| For hotel, restaurant and similar buildings | | 5126 | 51260 | 4520 |
| For educational buildings | | 5127 | 51270 | 4520 |
| For health buildings | | 5128 | 51280 | 4520 |
| For other buildings | | 5129 | 51290 | 4520 |
| Construction work for civil engineering | 513 | | | |
| For highways (except elevated highways), street, roads, railways and airfield runways | | 5131 | 51310 | 4520 |
| For bridges, elevated highways, tunnels and subways | | 5132 | 51320 | 4520 |
| For waterways, harbours, dams and other water works | | 5133 | 51330 | 4520 |
| For long distance pipelines, communication and power lines (cables) | | 5134 | 51340 | 4520 |
| For local pipelines and cables; ancillary works | | 5135 | 51350 | 4520 |
| For constructions for mining and manufacturing | | 5136 | 51360 | 4520 |
| For constructions for sport and recreation | | 5137 | | |
| For stadia and sports grounds | | 51371 | | 4520 |
| For other sport and recreation installations (e.g. swimming pools, tennis courts, golf courses) | | 51372 | | 4520 |
| For engineering works n.e.c. | | 5139 | 51390 | 4520 |
| Assembly and erection of prefabricated constructions | 514 | | | 4520 |
| Assembly and erection of prefabricated constructions | | 5140 | 51400 | |
| Special trade construction work | 515 | | | |
| Foundation work, including pile driving | | 5151 | 51510 | 4520 |
| Water well drilling | | 5152 | 51520 | 4520 |
| Roofing and water proofing | | 5153 | 51530 | 4520 |
| Concrete work | | 5154 | 51540 | 4520 |
| Steel bending and erection (including welding) | | 5155 | 51550 | 4520 |
| Masonry work | | 5156 | 51560 | 4520 |
| Other special trade construction work | | 5159 | 51590 | 4520 |
| Installation work | 516 | | | |
| Heating, ventilation and air conditioning work | | 5161 | 51610 | 4530 |
| Water plumbing and drain laying work | | 5162 | 51620 | 4530 |
| Gas fitting construction work | | 5163 | 51630 | 4530 |
| Electrical work | 5164 | | | |
| Electrical wiring and fitting work | | 51641 | | 4530 |
| Fire alarm construction work | | 51642 | | 4530 |
| Burglar alarm system construction work | | 51643 | | 4530 |
| Residential antenna construction work | | 51644 | | 4530 |
| Other electrical construction work | | 51649 | | 4530 |
| Insulation work (electrical wiring, water, heat, sound) | | 5165 | 51650 | 4530 |
| Fencing and railing construction work | | 5166 | 51660 | 4530 |
| Other installation work | | 5169 | | |
| Lift and escalator construction work | | 51691 | 4530 |
| Other installation work n.e.c. | | 51699 | 4530 |
| Building completion and finishing work | 517 | | | |
| Glazing work and window glass installation work | | 5171 | 51710 | 4540 |
| Plastering work | | 5172 | 51720 | 4540 |
| Painting work | | 5173 | 51730 | 4540 |
| Floor and wall tiling work | | 5174 | 51740 | 4540 |
| Other floor laying, wall covering and wall papering work | | 5175 | 51750 | 4540 |
| Wood and metal joinery and carpentry work | | 5176 | 51760 | 4540 |
| Interior fitting decoration work | | 5177 | 51770 | 4540 |
| Ornamentation fitting work | | 5178 | 51780 | 4540 |
| Other building completion and finishing work | | 5179 | 51790 | 4540 |
| Renting services related to equipment for construction or demolition of buildings or civil engineering works, with operator | 518 | 5180 | 51800 | 4550 |