STEEL BEAM WITH ORDINARY CROSS-PROFILED WALL WITH TRAPEZOIDAL SHAPE WITH CHORDS OF CHANNEL BARS

摘要

A steel beam with ordinary cross-profiled wall with trapezoidal shape with chords made of channel bars comprises bearing ribs, chords as channel bars, connection of the wall with trapezoidal shape is arranged with self-cutting screws. It has ordinary profiled wall and lower number of self-cutting fixation screws, this provides substantial decrease of consumption of material.