the supporting parts being composed of two or more materials; Composite steel and concrete constructions (of reinforced concrete E04B1/20)

Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs > Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons > the supporting parts being composed of two or more materials; Composite steel and concrete constructions

Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs (scaffolds, shutterings E04G; structures specially adapted for buildings for special purposes, general layout of buildings, e.g. modular co-ordination, E04H) > Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons (E04B1/32 - E04B1/36 take precedence; elongated load-supporting parts as elements, trusses, truss-like structures E04C3/00) > the supporting parts being composed of two or more materials; Composite steel and concrete constructions (of reinforced concrete E04B1/20)