3D BIM

Although 3D is a generic term used, BIM models vary greatly from the traditional surface based models. They are required to carry certain amount of information to be considered as BIM Models.

3D-BIM Models are object based models developed with components representing the real world building elements like walls, doors, windows etc.

The models should contain accurate sizes (length, width & height) for certain design defining components . Some of the information can be incorporated into the model using parameters or by representing on 2D drawings based on the project BIM use.

Depending on the purpose of the models, an LOD Matrix should be developed to help guide the modeling team to decide 3D vs. 2D information required in the models.

Visualization

3-D BIM Models in majority are used for visualization purposes. However, to successfully generate quality output from the models are required to contain accurate geometry and high-quality material assignment wherever needed.

Coordination

BIM Models used for coordination are more complex and require information beyond accurate sizes. The BIM coordinator must be able to categorize the model elements into various disciplines and groups easily. This will help with prioritizing and color coordinating the models during design coordination.

Quantity Take-off

BIM Models developed for quantity take-off exercises require the files to be organized and elements broken down in a certain way. The modeling methodology and naming conventions are the two important things to consider during this activity.