In order to avoid numerical problems, the stiffness of a rigid member is adapted to the rest of the structure. This member type is used for rigid nodal constraints, which also allow for nonlinear restraints, eccentricities, member elastic foundations, and member nonlinearities in contrast to the "Coupling" member type. Furthermore, it is also possible to apply a load on rigid member.
Rigid members are ofter used to replace an eccentricity, to connect member elements with surfaces, and as "spoke wheels" of a FEA connection.