Cladding panels of metal for building; modular wall panels of metal and ceiling paneling of metal; building materials, namely composite panels composed primarily of metal for walls; doors of metal; door sections of metal, namely, pre-coated galvanized steel and stainless steel door frames, door hinges, spring-loaded door closers and door handles; metal window frames; door locks of metal; structural parts and fittings for all the aforesaid goods