LE neg. (effective length for lateral-torsional buckling)

This parameter is for hogging moment regions. This length is related to the length of the compression flange between restraints; see Section 4.3.5 of the Code. If LE = 0 the program will adopt LE = L (flexural length between nodes). In members with I-sections and one flange laterally restrained, the flag “Restrained flange” should be enabled to adopt Annex G in the out-of-plane stability calculations. In this case LE should consider the distance between intermediate restraints.

LE neg. is the unbraced length of the flange in the negative side of local axis 2. The program uses the appropriate distance for each load case or combination depending on what flange the compression is caused by the correspondent bending moment.