Steel sheets; Steel pipes; Building boards of metal; Stop collars of metal; Stop of metal; Strap-hinges of metal; Brackets of metal for building; Framework of metal for building; Reinforcing materials of metal for building; Fittings of metal for buildings; Buildings of metal; Hardware of metal; Joists of metal; Linings of metal; Nuts of metal; Pillars of metal for buildings; Poles of metal; Posts of metal; Props of metal; Sheet piles of metal; Sheets and plates of metal; Trellis of metal; Tubes of metal; U-Shaped steel dampers for seismic isolation buildings

Building construction; building insulating; building sealing; damp-proofing (building); demolition of buildings; construction of airports; construction of aquatic facilities; construction of telecommunication towers; harbour construction; pier construction; residential and commercial building construction; road construction; earthworks or concrete construction; construction of base-isolation and vibration-control device for building; steel structure construction; warehouse construction; construction of artificial islands; construction of tunnels; construction of stadiums; construction of storage tanks; drilling of wells; factory construction; industrial furnace installation and repair; machinery installation; pipeline construction and maintenance; plumbing; riveting; underwater construction; underwater repair; construction of natural oil drilling platforms; construction of natural gas drilling platforms; bridge construction; construction of offshore structures; construction of coastal structures; construction; construction information; building construction supervision; installation in the field of electrical power plants; installation, maintenance and repair in the field of chemical plants; installation, maintenance and repair in the field of steel plants; installation in the field of waste treatment plants; installation in the field of polychlorinated biphenyl treatment plant; installation in the field of recycling plants; installation in the field of energy plants; installation in the field of liquefied natural gas plants; air conditioning apparatus installation and repair; installation, maintenance and repair of computer hardware; telephone installation and repair; electric appliance installation; boiler cleaning and repair; burner maintenance and repair; pump repair; construction consultation; repair or maintenance of chemical processing machines and apparatus; repair or maintenance of metalworking machines and tools; repair or maintenance of industrial furnaces; repair or maintenance of storage tanks