The aim of this course is to explore the design, mechanical behavior and calculation (pre dimensioning) of the structural systems based on assembling either steel or wood; mainly articulated knots. The student will deal with: steel frame structures; steel decks and steel spatial structures. Students will get to know the different connection mechanisms: bolted and welded. The course is focalized on steel and so this material will have a deep approach; nevertheless wood structures -platform frame and CLT- are also covered. The course analyses the different ferrous alloys and their life-cycle assessment. The student will deal with parametric design/pre-dimensioning using BIM.