Results for the elastic (bifurcation) stability analysis of cubic spac
e frames composed of bisymmetrical cold-formed steel sections are pres
ented. The influences of flexible connections and partial warping rigi
dity are considered. Calculation of the critical load is based on a fi
nite element eigenvalue algorithm which combines a secant iteration, d
eterminant search routine with a 'shifted' inverse iteration strategy.
A parametric study on the effect of connection and warping rigidity f
or the frames subjected to gravity and lateral twist loading is presen
ted. Effects of column orientation and member stiffness on frame stabi
lity are discussed.