The is a fundamental structural steel section, commonly known as an "H-beam" or RSJ (Rolled Steel Joist). The designation specifically refers to its nominal dimensions and weight, with 46.1 kg/m being its standard weight per linear metre. Key Specifications and Properties
The 46 kg/m version is lighter, making it easier to handle and cheaper per metre, but with lower bending and axial capacity than heavier UC sections. 203x203x46 uc weight