Finite element analysis of the crane secondary truss of top-blown oxygen vessel plant with the span of 36m is considered in the paper. Analysis of crane secondary truss is quiet difficult because of necessity of taking into account actual stiffness of its joints and also because of the fact that lower belt of truss made of thin-walled closed profile is experiencing restrained torsion because of eccentrically crane load acting. For these reasons modeling of crane secondary truss with the use of beam finite elements not allows to obtain correct results. That is why the shell finite elements should be used to model crane secondary truss. The required finite element mesh is determined in the paper. Participation of the truss into work of entire building skeleton is analyzed and the design scheme of the framework that allowed to obtain reliable results is selected.