C b is a modification factor used in the equation for nominal flexural strength when determining lateral-torsional buckling. The reason for this factor is to allow for non-uniform moment diagrams when the ends of a beam segment are braced. The conservative value for C b can be taken as 1, regardless of beam configuration or loading, but in some cases it may be excessively conservative. C b is always equal to or greater than 1, never less. For cantilevers or overhangs where the free end is unbraced, C b is equal to 1. Tables of values of C b for simply supported beams exist.