R Coefficient - Y
The appropriate type of carrier system is selected from the list according to the ductility level you choose and the type of bearing system in the Y direction. According to the previous selections, some building types are not allowed to be selected at this step within the scope of the principles specified in TDBY 2018.
![](../__attachments/1089438448/image-20221025-075045.png?inst-v=e297b259-93ee-4526-bee7-06170d782e4d)
How the building behavior coefficient is determined is shown in the flow diagram below.
![](../__attachments/1089438448/image-20200603-125128.png?inst-v=e297b259-93ee-4526-bee7-06170d782e4d)