3502001 Bridges, heavy steel
3502002 Bridges, light alloy
3502005 Bridges, metal, suspension
3502006 Bridges, metal, swing
3502007 Bridges, metal, transporter
3502008 Bridges, metal, bascule
3502010 Bridges, metal, prefabricated unit
3502011 Bridges, metal, pipe
3502014 Bridges, metal, railway and road
3502015 Footbridges, metal
3502016 Utilities bridges, temporary, steel
3502017 Walkways, suspended, catwalks, metal
3502019 Trestle-work, metal
3502020 Lock and sluice gates, metal
3502021 Spillway gates, steel
3502022 Flood barriers, metal, mobile
3502025 Masts and pylons, steel
3502026 Masts and pylons, light alloys
3502027 Masts, metal, telescopic
3502028 Masts and towers, metal, for communication systems
3502029 Masts, metal, controlled triggering of avalanches
3502030 Electric transmission line towers and electricity pylons, metal
3502031 Poles, metal, for telephone and electricity power lines
3502032 Cableway towers, metal
3502033 Towers, floodlighting or aircraft beacon, metal
3502034 Street standards, tramway and trolleybus, steel
3502035 Wind generator towers, steel
3502036 Stanchions and lattice stanchions, metal
3502038 Bridge bearings, metal
3502039 Arch centres, metal, for tunnels
3502041 Expansion joints, metal, for roads and bridges
3502043 Flooring sheets, metal, drawn, for bridges
3502045 Roads and runways, portable, prefabricated metal
3502047 Structural steelwork for hydroelectric plant
3502048 Offshore structures, metal
3502049 Steelwork, prefabricated, for ships
3502050 Prefabricated superstructures, metal, for ships
3502051 Pipe support systems, metal
3502052 Avalanche barriers, metal
3502053 Air raid shelter elements, metal
3502054 Pipe racks, metal, for the petroleum industry
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