In this work, an experimental study on a new composite column system is developed. It consists on a double I section column connected by the webs and filled with reinforced concrete between the I sections. It also includes stud bolt connectors welded to the webs, allowing a higher steel-concrete interaction and avoiding web buckling. Throughout this work, details on the best way to fabricate the system will be provided and also project recommendations will be given. An experimental programme was developed at the Structures and Materials Laboratory of PUC-Rio. The objective of this programme was to evaluate the structural behaviour of the proposed system when submitted to a bending test, determining its load vs displacement behaviour, the ultimate plastic load, the difficulties of fabrication and the cost-benefit after considering all of the steps developed.