Abstract: A composite bar section for furniture and interior fittings is formed by two or more section bars and connecting elements, the connecting elements being inserted between two adjacent section bars, shaped and so undetachably interconnected, that on two opposite sides of the composite bar longitudinal slots are formed for housing randomly positionable connecting members of further components. As a function of the requirements, while using the same section bars, varyingly wide connecting elements can be used and consequently the cross-sectional shape of the sections can be varied.