Universal Beams, otherwise known as I-beam, UBs, I section, RSJs, rsj beams, h beam, steel lintels steel girder and load bearing steels. Universal beams are essential for any major support or structural integrity in building construction. These steel beams are hard-wearing and strong. RSJ or Rolled steel joists are very popular in the building trade used mainly for steel lintels. Small medium and large scale structural steel projects all use a variety of steel sections such as I beams, H columns and pfc channels.