Considerations When Creating a 3D Project Drawing

The following are the key points to be taken into account by the author responsible for design tasks while developing 3D projects to be used in Design, Construction, and Operation processes, in order to ensure the healthy execution of BIM processes:

1. During the design process, design software that allows export in IFC file format should be used.
2. It is expected that regions and disciplines are defined within the design file. The elements within the model should also be defined in the same manner. This approach makes the workspace more understandable and enables more efficient use of the model. If necessary, these regions and disciplines can also be modeled in separate design files. For example, A Block Architectural – B Block Structural – C Block Facade…
3. In models containing elements like blocks, stations, disciplines, etc., a connection should be established with the main model. Then, coordinates should be assigned to the models according to the site plan, or the design should be carried out with all disciplines based on the same starting point. Otherwise, the IFC exports obtained from the program will have incorrect coordinates.
4. During modeling, parameters such as Type Mark, Position Number, Mark ID, etc. of the elements need to be entered in a suitable manner for the project. If necessary, as the work schedule and material selections are determined, new parameters can be added to the model. Detailed definition of parameters for elements within the model will facilitate the management of processes. It is important that these definitions use a common code system across all disciplines (see: BEP – BIM Execution Plan).
5. In tasks such as flooring, facade walls, excavation, landscape elements, etc., elements within the model should be designed with minimum size, considering different construction methods. For instance, a 500m3 floor slab can be poured all at once according to the concrete pouring plan, or it can be poured in multiple phases. In this case, if there is a possibility that the contractor might not pour the entire floor slab at once, the floor slab should be designed with the minimum size.
6. In the BIM model, floor parameters hold significant importance for proper task tracking. The correct functioning of filters depends on the compatibility of floor parameters across different disciplines. It is important that these definitions use a common code system across all disciplines (see: BEP – BIM Execution Plan).

Eray Burukoglu & Nesrin Akın Oztabak