Abstract: A construction profile (1) with a polygonal cross-section and edge portions provided with slots formed between adjacent polygon faces (7) and extending in an inclined direction relative thereto, a construction profile kit with said construction profile and joint profiles, and an fixing system for ventilated claddings with a supporting frame of construction profiles (1). The fixing system further comprises a supporting element (21) for supporting a frame profile (1) to a facade (87) and a holding plate (26) for holding facade plates (83), the elements (21, 26) being formed so as to be slid longitudinally or plugged circumferentially into the slots (5) of the construction profile (1).