| 83310 | Structural installation appraisal of tunnels | |
| 83310 | Structural installation appraisal of waterways | |
| 83310 | Structural installation appraisal of waterworks | |
| 88711 | Structural metal product manufacturing services | |
| 88533 | Structural non-refractory clay building materials manufacturing services | |
| 54550 | Structural steel erection services | |
| 54550 | Structural steel, erection of | |
| 53129 | Structures for indoor swimming pools | |
| 42190 | Structures, aluminium (complete or incomplete), whether or not assembled (excl. floating structures) | |
| 38704 | Structures, complete or incomplete, prefabricated or sectional, of concrete | |
| 38702 | Structures, complete or incomplete, prefabricated or sectional, of metal | |
| 38703 | Structures, complete or incomplete, prefabricated or sectional, of plastics | |
| 38701 | Structures, complete or incomplete, prefabricated or sectional, of wood | |
| 53232 | Structures, hydromechanical | |
| 54232 | Structures, hydromechanical, general construction of | |
| 83449 | Structures, magnetic testing of | |
| 54310 | Structures, other, demolition of | |
| 54310 | Structures, other, wrecking of | |
| 42190 | Structures, parts of, of aluminium | |
| 42190 | Structures, parts of, of iron or steel | |
| 41602 | Structures, parts of, of magnesium | |
| 42999 | Structures, parts of, of nickel | |
| 54400 | Structures, prefabricated, assembly of | |
| 54400 | Structures, prefabricated, erection of | |
| 54400 | Structures, prefabricated, installation of | |
| 83449 | Structures, radiographic testing of | |
| 83449 | Structures, ultrasonic testing of | |
| 42992 | Struts, lid, of base metal, for travel goods | |
| 42190 | Struts, roofing, of aluminium | |
| 31600 | Struts, roofing, of wood | |
| 35250 | Strychnine arsenate, not put up as medicaments | |
| 35250 | Strychnine hydrochloride, not put up as medicaments | |
| 35250 | Strychnine nitrate, not put up as medicaments | |
| 35250 | Strychnine phosphate, not put up as medicaments | |
| 35250 | Strychnine phosphinate, not put up as medicaments | |
| 35250 | Strychnine salts, not put up as medicaments | |
| 35250 | Strychnine sulphate, not put up as medicaments | |
| 35250 | Strychnine, not put up as medicaments | |
| 49129 | Stub-axles for road motor vehicles | |
| 54720 | Stucco work, exterior, construction of | |