As you said, Mr. Hakan, I have a floor at a different level due to the entrance of the apartment on the 1st Basement ceiling, and I have some floors with low floors on the ground floor ceiling. but I don't have a floor that has a different elevation on the 1st floor. But the height of h is shown differently on it.I wonder if the floors at different elevations affect both the downstairs and the top floor when calculating the 2nd order effects?"HakanŞahin":2xyavuxc" said:The floor height is used in controls such as the 2nd order effects, but the floor heights we enter in the floor general settings are not absolute. Since the concept of floor height is related to the effect of the floor on the system as a diaphragm, it will also be related to the elevation of the floors. This is what the program does Actually, an effective (average) floor height value is taken into account according to the different floor levels entered.