In the design of Tat Bank in Fereshteh Street, shade blades are considered that enter the interior space from the outside of the building. These blades, which move on the ceiling, in addition to inviting people into the bank, can guide them to the counters. 

Each of these blades increases in length and height inside the bank space and finally passes over the counters and the distance between each defines the border between two counters. With the help of these blades, the outside and inside of the building are well connected. 

Spatial divisions are planned in such a way that the main hall of the bank is in the center of the entry point of the blades, and the service and support spaces and departments related to employees are placed around the main hall of the bank to connect well with the bank counters.