rsjs what you need to know guide an rsj and a universal steel beam rolled steel joist uses of rsj in steel beam design worked example rc encased steel joist beams webstructural free steel beam design custom fabricated structural steel steel beam splice design en1993 structural steel joist beam columns steel beam design spreadsheet steel beams according to bs 5950 custom steel joists fabrication steel beam splice design en1993 frontend optimal beam steel joists