Sn erol35 My suggestions: --Fix the geometry errors, --You can reduce the beam thicknesses to 40 cm phase, --You can reduce the moving loads in the attic, --Give the K14 beam in the mezzanine to support the staircase to the mezzanine, --If the P03 curtain is attached to the floor like you gave it, that's the place in the earthquake. breaks off. Even if it is not a good solution, put a beam that presses the K8 beam at the end of the P03 curtain, -- You do not need to take a live load on the wall. Take it easy Ünver ÖZCAN