In the program generations RFEM 5 and RSTAB 8, an intermediate lateral restraint describes one or more additional restraints that can be defined between supports. These are crucial for calculating the elastic critical buckling moment Mcr for lateral-torsional buckling.
In general, it is possible to enter a lateral support (in the y‑direction), a restraint (about the x‑axis), and eccentricity (in the z‑direction) as rigid supports or springs.
In the program generations RFEM 6 and RSTAB 9, you can model intermediate lateral restraints for the boundary conditions in the form of intermediate nodes with support properties.