The paper presents preliminary results of analytical investigations concerning an axially compressed closely spaced element, verified experimentally. The investigated tentative element consists of three branches, made of cold-bent steel sheet. Two branches with a channel-bar cross-section are strengthened by the third branch with a tubular crosssection, the walls of which adjoin the webs of the channel bars. The walls of the three branches forming a bisymmetric cross-section are connected with each other flexibly by means of blind bolts. The tubular branch takes over more than 30 % of the entire load of the complex tentative element, as has been proved both by analytical and experimental results.
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