Creation of a vertical rib made by reinforced concrete and placed in AAC mattONE “O-Block” 500, having thermal conductivity λ10 dry equal to 0.12 W / mK and CE marking in accordance with UNI EN 771-4, Euroclass fire reaction A1,size 20, 24, 30, 36, 40, 45, 50 cm x 25 x 62.5 cm (S x H x L), section diameter for reinforced CLS casting 12.5 cm (20 cm sp), 15 cm (sp 24 cm) and 20 cm (sp ≥ 30 cm) (reinforcement calculations and checks to be carried out).