TIE BEAM TABLE 1 design in AutoCAD 2D drawing. In order to increase the overall rigidity and balance of the structure at the foundation level, a tie beam is a beam that links two or more columns or rafters in a roof or roof truss or at any height above the floor. Tie beams are typically provided at the floor level, plinth, and roof truss. For more knowledge and detailed information download the AutoCAD 2D dwg file.