Now the default connection time board of Revit deducts walls, columns and beams. And other deductions, but this default can not be changed on the project, causing some trouble, such as the masonry wall to the bottom of the plate, the bottom of the beam, and the structure wall to the top of the plate. If completed through the third party plug-in, it will lead to the increase of project files and slow response of software, resulting in project editor Caton. If you do not use third party plug-ins, you can only modify the connection mode one by one while creating the model. This is a very time-consuming way. The way of connection and the deduction rule directly affect the quantity in the list of Revit, which has great influence on the accuracy of the quantity. There should also be deductions and connections between buildings and structures, such as building walls (not involved in force analysis) and structural walls (participating in force analysis) should not be connected, and the wall should be deducted from the structure. The priority of the structure is greater than the priority of the building, such as the building members can not form the connection and deduction of the structural members, for example, when the wall of the building passes through the structure column, the structure column automatically deduct the wall of the building. It also cuts into the surface of the material, such as plastering and surface with the same material as the wall column, so the surface layer is sheared. The same building wall is the same as a structural wall. Where is the bottom and side surface of the frame structure (beam)? If Revit can add a family of ornamental systems (this proposal I mentioned before) the problem has been solved, and the connection and shear relationship can also be formed with the other surface layers. At the same time, it is also hoped that the surface layer can be added to the hole (wall entrance and plate opening). So the surface of the doors and windows can also be counted. It is also suggested that the display procedures can be set up in the family's visibility settings and in what procedures. Thus, doors and windows, furniture and so on will not be displayed in the structural regulations.