Hello. My suggestions; --Take the Boton value as C30, --make the inner 40/35 beams 60/35, --Remove the moving loads in the attic floor, --10 in the wizard. In flooring type You should choose mixed or limited floor slab in one direction, as if it is valued according to the ground safety load, it should be less than 15 t/m2 and approximately 2.5 times more than the floor bearing capacity. --Make the L curtain a curtain group. , -- Since the size sign in the item 4.3.2.4.b check in the account output is reversed, the tipping check may not be correct.